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WO2020196973A1 - Air purifier having movable fine dust filter mounted thereon - Google Patents

Air purifier having movable fine dust filter mounted thereon Download PDF

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Publication number
WO2020196973A1
WO2020196973A1 PCT/KR2019/003982 KR2019003982W WO2020196973A1 WO 2020196973 A1 WO2020196973 A1 WO 2020196973A1 KR 2019003982 W KR2019003982 W KR 2019003982W WO 2020196973 A1 WO2020196973 A1 WO 2020196973A1
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WO
WIPO (PCT)
Prior art keywords
filter
composite filter
fine dust
air
metal precursor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2019/003982
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French (fr)
Korean (ko)
Inventor
최원산
한나라
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Industry Academic Cooperation Foundation of Hanbat National University
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Industry Academic Cooperation Foundation of Hanbat National University
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Publication date
Application filed by Industry Academic Cooperation Foundation of Hanbat National University filed Critical Industry Academic Cooperation Foundation of Hanbat National University
Publication of WO2020196973A1 publication Critical patent/WO2020196973A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0039—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0052—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with filtering elements moving during filtering operation
    • B01D46/0056—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with filtering elements moving during filtering operation with rotational movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0471—Surface coating material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing

Definitions

  • the present invention relates to a fine dust filter and an air purifier equipped with the same, and more specifically, a composite filter that exhibits excellent fine dust removal efficiency and is reusable as a mobile filter, maintains a low pressure drop even at a high flow rate, It relates to a high-performance air purifier capable of removing dust.
  • PM Particulate Matter
  • PM10 for aerodynamic particle diameter of 10 ⁇ m
  • PM2 for ultrafine dust of 2.5 ⁇ m or less Classified as .5.
  • a pre-filter In order to remove fine dust, various filters such as a pre-filter, a carbon filter, a HEPA filter (High Efficiency Particulate Air Filter, HEPA), and a fiber-structured polar membrane have been developed.
  • HEPA filter High Efficiency Particulate Air Filter, HEPA
  • fiber-structured polar membrane In order to remove fine dust, various filters such as a pre-filter, a carbon filter, a HEPA filter (High Efficiency Particulate Air Filter, HEPA), and a fiber-structured polar membrane have been developed.
  • HEPA filter High Efficiency Particulate Air Filter, HEPA
  • the fine dust filter developed to date has a disadvantage in that it must undergo a high-energy precision process in the manufacturing and processing process.
  • the filter does not permanently remove fine dust, but only collects fine dust, and there is a problem in that the efficiency of removing fine dust decreases after a certain time. Specifically, as the amount of fine dust collected by the filter increases, the removal efficiency of the filter remains and the removal efficiency decreases, and as a result, there is an economic problem that must be replaced with a new filter.
  • conventional fine dust filters are all fixed filters that are fixed inside the air purifier, and when air is introduced into the filter, the flow of air is obstructed by the fixed filter, resulting in a high pressure drop of several hundreds Pa.
  • An object of the present invention is to provide a composite filter having excellent fine dust (PM10) and ultrafine dust (PM2.5) removal efficiency, and exhibiting high fine dust removal efficiency even when washed and reused, and a manufacturing method thereof.
  • an object of the present invention relates to an air purifier comprising a movable filter, maintaining a low pressure drop, and capable of rapidly removing fine dust and at the same time having a high fine dust removal efficiency.
  • the present invention for achieving the above object comprises the steps of: a) adding a filter substrate to an aqueous metal precursor solution to etching and simultaneously coating the metal precursor; And b) reducing the metal precursor coated on the filter substrate to metal particles.
  • the filter base material may be a melamine resin foam.
  • the metal precursor may be a hydroxide, halide, or nitric oxide of any one or two or more metals selected from precious metals.
  • the metal precursor may be a mixed precursor of silver, platinum, and palladium precursors.
  • the content of the solid content of the metal precursor in the aqueous metal precursor solution may be 1 to 300 ⁇ M.
  • the etching in step a) may be characterized in that the filter substrate is etched into a spherical shape.
  • a step of hydrophilic treatment and magnetic treatment on the filter substrate coated with metal particles may be further included.
  • the present invention provides a composite filter in which any one or two or more mixed metal particles selected from silver, platinum and palladium are coated on the etched surface.
  • the composite filter may be hydrophilic and magnetically treated.
  • the composite filter may have a removal efficiency of 85% or more of fine dust (PM10) and ultrafine dust (PM2.5).
  • the composite filter may be characterized in that it has a spherical shape having a diameter of 1 to 500 mm.
  • the present invention provides an air purifier comprising the composite filter as a filter for air purification.
  • the air purifier includes an air inlet, a chamber mounted with the composite filter, and an air outlet, and the composite filter may be a movable filter having fluidity by the flow of incoming air.
  • the air purifier may be of a lotto machine type, characterized in that the composite filter is rotated by incoming air.
  • the air purifier may be capable of removing fine dust (PM10) and ultrafine dust (PM2.5) at a filter speed of 1.0 m/s or more in a pressure drop ( ⁇ P) of 50 Pa or less. have.
  • the fine dust filter according to the present invention has the advantage of excellent removal efficiency for fine dust (PM10) and ultrafine dust (PM2.5), excellent elasticity and mechanical properties, and can be washed and reused.
  • the fine dust filter according to the present invention has fluidity by air and can be applied as a movable filter, so that the pressure drop generated in the filter is low.
  • the air purifier including the fine dust filter according to the present invention has the advantage of not only being able to remove fine dust at high speed at a low pressure drop ( ⁇ P) of 50 Pa or less, but also remarkably improving air quality within a short time.
  • FIG. 1 is a flow chart of a method for manufacturing a composite filter according to an aspect of the present invention.
  • FIG. 2 is a schematic diagram of a lottery machine-type mobile air purifier according to an aspect of the present invention.
  • FIG. 3 is a visual photograph of an etched foam according to an aspect of the present invention.
  • FIG. 4 is a naked eye photograph of a composite filter according to an aspect of the present invention.
  • SEM scanning electron microscope
  • EDS 6 is an energy dispersive spectrum (EDS) analysis result of a composite filter according to an embodiment of the present invention.
  • FIG. 7 is a visual photograph of a lottery machine-type mobile air purifier according to an aspect of the present invention.
  • FIG. 8 is a graph showing the fine dust and ultrafine dust removal efficiency of the composite filter according to an aspect of the present invention.
  • FIG. 9 is a graph showing fine dust and ultrafine dust removal efficiency according to the size of a composite filter according to an embodiment of the present invention.
  • FIG. 10 is a graph of measuring electrostatic voltage of a composite filter according to an embodiment of the present invention.
  • FIG. 11 is a graph showing fine dust and ultrafine dust removal efficiency according to repeated use of a composite filter according to an aspect of the present invention.
  • the present invention relates to a method of manufacturing a composite filter that has excellent removal efficiency for fine dust (PM10) and ultrafine dust (PM2.5) and can be used as a mobile filter, and specifically, a) a filter base material in an aqueous metal precursor solution Coating the metal precursor at the same time as the input and etching; And b) reducing the metal precursor coated on the filter substrate to metal particles.
  • PM10 fine dust
  • PM2.5 ultrafine dust
  • step a) as the filter substrate is added to the aqueous metal precursor solution and stirred, the metal precursor etch the filter substrate, and at the same time, the filter substrate in which the metal precursor is etched. It can be coated on the surface of.
  • a composite filter coated with metal particles may be manufactured.
  • the filter substrate may be used without limitation as long as it is a known filter material capable of adsorbing and removing pollutants in the air such as dust, fine dust, and ultrafine dust, and specifically, for example, cotton fiber And it may be any one or a mixture of two or more selected from the resin foam.
  • the resin foam for example, it is selected from polyurethane foam, urea foam, polyvinyl chloride foam, polypropylene foam, polyethylene foam, polyvinyl acetate foam, melamine resin foam, phenol resin foam, and foams of derivative resins thereof. Any one or two or more to be laminated or bonded may be mentioned, but the present invention is not limited thereto.
  • a melamine resin foam may be preferably used, and most preferably, a melamine formaldehyde foam may be used as the melamine resin foam.
  • the shape of the melamine formaldehyde foam may be in the form of cloth or cloth, preferably in the form of a sponge, but is not limited thereto.
  • the melamine resin foam may be effectively etched by a metal precursor in step a), and may exhibit elastic and mechanical properties suitable as a filter material for air cleaning.
  • step b) by coating metal particles on the etched surface of the melamine resin foam through step b) afterwards, the effect of adsorbing fine dust and ultrafine dust is improved, thereby having excellent removal efficiency.
  • the amount of contaminants adsorbed to the filter increases over time and the performance of the filter decreases.
  • the composite filter of the present invention made of the melamine resin foam it can be washed and reused. Excellent effect of maintaining high removal efficiency even after reuse.
  • the metal precursor is to increase the surface area of the filter substrate by etching, that is, removing a part of the filter substrate, and to improve the adhesion of the coated metal, and any one or two or more metals selected from precious metals It may be a hydroxide, a halide, or a nitrate, but is not limited thereto.
  • the metal precursor may include silver, gold, platinum, palladium, magnesium, copper, nickel, zirconium, etc., preferably, a hydroxide of any one or two or more metals selected from silver, platinum and palladium ,
  • the filter substrate may be etched using an aqueous solution of halide or nitric oxide and coated with a metal precursor.
  • any one or a mixture of two or more selected from silver nitrate, platinum hydrochloric acid and palladium nitrate may be used, and in this case, not only the filter substrate can be etched more effectively, but also the filter It is very easy to be coated on the surface of the substrate.
  • the metal precursor of the present invention most preferably, three different mixed precursors of silver, platinum, and palladium may be used, and the filter substrate may be etched into a spherical shape by using the three types of mixed precursors.
  • the filter substrate introduced in step a) has an excellent effect of being etched in a spherical shape.
  • the manufactured composite filter may be manufactured as a spherical composite filter coated with metal particles.
  • the etching in step a) is characterized in that the filter substrate is etched into a spherical shape.
  • step a) of the present invention may prepare a composite filter etched in various forms by etching the filter substrate as a metal precursor.
  • a metal precursor three different mixed precursors of silver, platinum and palladium When using, it is possible to manufacture a composite filter of a spherical shape.
  • the surface area of the composite filter is improved, so that a larger amount of contaminants, that is, fine dust and ultrafine dust, is adsorbed and removed, thereby remarkably increasing the removal efficiency.
  • the spherical composite filter when applied to an air purifier, the spherical filter is easily rotated by the flow of air introduced into the air purifier, so that fine dust can be quickly removed as a mobile filter.
  • the melamine resin foam of the present invention in the case of etching using the melamine resin foam of the present invention as a filter substrate, it can be manufactured as a spherical composite filter having various sizes, and it maintains high removal efficiency due to excellent elasticity and impact resistance and can be used for a long time, so it is economical to be.
  • the filter of is a spherical mobile filter that can operate at low pressure drop and can filter at high speed without deteriorating removal efficiency.
  • the content of the metal precursor solid content in the metal precursor aqueous solution may be 1 to 300 ⁇ M, specifically 2 to 100 ⁇ M, more specifically 5 to 60 ⁇ M, and the pH of the metal precursor aqueous solution is pH It may be 1 to 7, specifically pH 2 to 5, but is not limited to the above range.
  • the method of introducing the filter substrate into the aqueous metal precursor solution is specifically, the filter substrate cut into a cube shape of 1 to 500 mm, specifically 1 to 50 mm. 1 to 100 may be immersed in 50 to 1,000 mL of the metal precursor aqueous solution, for example, dipping, spraying, immersing, quenching, etc., may be brought into contact with the surface of the filter substrate. Means all the way.
  • the method of etching the filter substrate may be specifically, stirring the filter substrate in an aqueous metal precursor solution at a temperature of 10 to 60°C for 1 to 96 hours, specifically at a temperature of 20 to 40°C for 24 to 72 hours. It is not limited. By etching the filter substrate in the above temperature and time range, it is easy to manufacture a regular spherical composite filter.
  • step b) of the present invention is a step of reducing the metal precursor coated on the surface of the filter substrate etched in step a) into metal particles, and may be performed by a reduction method using a known reducing agent.
  • reducing agent for example, sodium borohydroride, ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol ( dipropylene glycol), propandiol, and alcohols such as butanediol, and an aqueous solution of any one or a mixture of two or more selected from aldehydes such as formaldehyde, but is not limited thereto.
  • the content of the reducing agent solid content in the reducing agent aqueous solution may be 0.1 to 20 mM, specifically 1 to 10 mM, but is not limited thereto.
  • a step of hydrophilic treatment and magnetic treatment to the composite filter coated with metal particles may be further included.
  • the composite filter in which the metal particles are coated on the surface etched through the steps a) and b) includes the hydrophilic treatment and magnetic treatment, thereby imparting hydrophilicity and magnetism to the surface.
  • hydrophilic treatment for example, any one or a mixture of two or more selected from polyethylene glycol having a weight average molecular weight of 100 to 1,000 g/mol, specifically 200 to 500 g/mol is used. It may be used to impart hydrophilicity to the surface of the composite filter, and preferably ethylene glycol may be used.
  • iron particles may be coated on the surface of the composite filter to provide magnetism.
  • the hydrophilic and magnetic treatment method for example, after dissolving a known iron precursor and a reducing agent thereof in the fluid, heat treatment at a high temperature of 150 to 250° C. for 1 to 12 hours, washing and drying it, Particles can be obtained. Subsequently, after dispersing the hydrophilic magnetic particles in ethanol, the previously prepared composite filter may be added and subjected to ultrasonic treatment for 1 to 60 minutes, specifically 10 to 30 minutes to impart hydrophilicity and magnetism to the composite filter, but is limited thereto. It does not become.
  • the iron precursor and the reducing agent are not particularly limited, but preferably, a hydrate of known iron halide such as ferric chloride and ferric bromide may be used as the iron precursor, and sodium acetate may be used as the reducing agent. have.
  • the solid content of the iron precursor and the reducing agent may be 1 to 20 parts by weight, specifically 2 to 10 parts by weight, respectively, based on 100 parts by weight of the fluid, but is not limited thereto.
  • fine dust and ultrafine dust are polar and have a property of attracting water vapor in the air.
  • the filter due to the hydrophilic magnetic particles The polar property of is improved and the effect of adsorbing fine dust is excellent.
  • the surface roughness of the composite filter is increased, and the amount of fine dust and ultrafine dust adsorbed on the composite filter is remarkably improved, thereby exhibiting a higher removal efficiency.
  • the hydrophilic and magnetically treated composite filter of the present invention has excellent adsorption effect of fine dust and ultrafine dust due to electrostatic attraction, specifically, the electrostatic voltage is 400 V or more, more specifically 500 V to 800 V. As the voltage is displayed, the adsorption performance of fine dust is very good.
  • the composite filter when used as a mobile air purifier filter, a large amount of fine dust can be adsorbed to the filter at a high speed without an increase in pressure drop, so that a high-speed and high-performance air purifier can be implemented.
  • iron particles exhibit magnetism, there is an advantage that can be applied to various fields such as separation membranes in addition to air purification filters.
  • the present invention relates to a composite filter manufactured by the above manufacturing method and coated with one or two or more mixed metal particles selected from silver, platinum, and palladium on the etched surface.
  • the composite filter according to the present invention is a composite filter in which the metal particles are coated on an etched surface, and has excellent fine dust (PM10) and ultrafine dust (PM2.5) removal efficiency, and high fine dust removal even when washed and reused It has the advantage of showing efficiency.
  • the substrate of the composite filter for example, it is selected from polyurethane foam, urea foam, polyvinyl chloride foam, polypropylene foam, polyethylene foam, polyvinyl acetate foam, melamine resin foam, phenol resin foam, and foams of derivative resins thereof. Any one or two or more may be laminated or bonded, preferably melamine resin foam, more preferably melamine formaldehyde foam.
  • a mixed metal of silver, platinum and palladium may be coated on the surface of a spherically etched foam to form a coating layer.
  • the composite filter has the advantage of being remarkably excellent in removal efficiency by adsorbing and removing a larger amount of contaminants, that is, fine dust and ultra-fine dust, and enabling the filter at high speed without deteriorating the removal efficiency even at a low pressure drop.
  • the composite filter may be hydrophilic and magnetically treated.
  • the filter of the present invention is hydrophilic and magnetically treated to further include a hydrophilic and magnetic layer in the filter, the filter has remarkably excellent ability to adsorb fine dust by electrostatic attraction, and the electrostatic voltage is improved, resulting in a large amount at a high speed. It has the advantage of adsorbing fine dust.
  • the composite filter according to the present invention may have a removal efficiency of 85% or more, specifically 95% or more, and more specifically 99% or more of the fine dust PM10 and the ultrafine dust PM2.5.
  • the removal efficiency may be calculated according to Equation 1 below.
  • Removal efficiency (%) [(fine dust concentration before filter-fine dust concentration after filter)/fine dust concentration before filter] X 100
  • the composite filter may have various sizes and shapes, preferably 1 to 20 mm, specifically may be a spherical one having a diameter of 2 to 10 mm.
  • the size is the filter substrate to be input
  • the present invention relates to an air purifier comprising the composite filter as an air purification filter.
  • the air purifier of the present invention includes an air inlet, a chamber equipped with a composite filter, and an air outlet, as shown in FIG. 2, and specifically, the composite filter mounted in the chamber is It may be a movable filter having fluidity by flow. In this case, the air purifier may further include a fine dust inlet through which fine dust particles collected by burning incense are introduced, but the present invention is not limited thereto.
  • the chamber may be used without limitation as long as it is capable of mounting a composite filter, and may be made of a material such as glass, plastic, metal, and ceramic.
  • the air purifier of the present invention may be of a lottery machine type, characterized in that the composite filter is rotated by incoming air.
  • the composite filter of the present invention can be applied as a mobile filter as it has fluidity by the air flow, and the spherical composite filter rotates on the surface due to the air introduced through the air inlet or fine dust inlet. It can adsorb fine dust and ultrafine dust.
  • the air purifier may be capable of removing fine dust and ultrafine dust at a filter speed of 1.0 m/s or more in a pressure drop ( ⁇ P) of 50 Pa or less, and specifically 25 Pa or less. It is possible to remove fine dust and ultrafine dust at a filter speed of 2.0 m/s or more at a pressure drop ( ⁇ P), more specifically 2.5 to 9.0 m/s at a pressure drop ( ⁇ P) of 6 to 20 Pa. have.
  • the air purifier according to the present invention includes the composite filter as a mobile filter, the pressure drop generated in the filter is low, and more specifically, a high speed in the range at a low pressure drop ( ⁇ P) in the range. As it is possible to remove fine dust, there is an advantage of remarkably improving air quality within a short time.
  • Fine dust removal efficiency (E) [(fine dust concentration before filter-fine dust concentration after filter)/fine dust concentration before filter] X 100 (%)
  • QF Quality Factor
  • m-QF quality factor X air injection speed (m/s ⁇ Pa)
  • a metal precursor aqueous solution was prepared by stirring 53.5 ⁇ M silver nitrate aqueous solution 30 mL, 9.01 ⁇ M platinum hydrochloric acid aqueous solution 30 mL, and 8.98 ⁇ M palladium nitrate aqueous solution 30 mL for 1 minute. At this time, the pH of the aqueous metal precursor solution was 2.1. Then, 100 pieces of melamine-formaldehyde sulfate foam (Basf's Basotect) were cut into a cube having a size of 0.5 X 0.5 0.5 cm 3 to 1.3 X 1.3 X 1.3 cm 3 .
  • the cut foam was added to the aqueous metal precursor solution and etched by stirring at 25° C. for 10 hours (Example 1), 24 hours (Example 2), 48 hours (Example 3) and 72 hours (Example 4), respectively.
  • a foam coated with a metal precursor was obtained on the surface.
  • Example 4 prepared using an Energy Dispersive Spectrometer (EDS), as shown in Fig. 6, consisting of 45.53% platinum, 31.49% silver, and 22.98% palladium. Confirmed.
  • EDS Energy Dispersive Spectrometer
  • the spherical composite filter of Example 4 manufactured in an air purifier including a fine dust inlet, an air inlet, and an outlet from which the purified air is discharged was mounted as a mobile filter.
  • the air purifier exhibited a motion similar to that of a ball in the lottery machine as the composite filter rotates by air flowing in through the air inlet, and the filter introduced fine particles (PM in) through the fine dust inlet.
  • the purified air was discharged to the discharge unit by adsorbing and removing dust (PM10) and ultrafine dust (PM2.5).
  • a composite filter was prepared in the same manner as in Example 4, except that 45 mL of a 9.01 ⁇ M aqueous platinum hydrochloric acid solution and 45 mL of a 8.98 ⁇ M palladium nitrate aqueous solution were used as the metal precursor aqueous solution in Example 4. It was confirmed that the composite filter had a cube shape.
  • a composite filter was prepared in the same manner as in Example 4, except that 45 mL of 53.5 ⁇ M silver nitrate aqueous solution and 45 mL of 8.98 ⁇ M palladium nitrate aqueous solution were used as the metal precursor aqueous solution in Example 4. Was confirmed to have a cube shape.
  • a composite filter was prepared in the same manner as in Example 4, except that 45 mL of 53.5 ⁇ M silver nitrate aqueous solution and 45 mL of 9.01 ⁇ M platinum hydrochloric acid aqueous solution were used as the metal precursor aqueous solution in Example 4, It was confirmed that the filter had a cube shape.
  • Example 4 As a result of manufacturing a composite filter in the same manner as in Example 4, except that only an aqueous silver nitrate solution was used as the metal precursor aqueous solution in Example 4, it was confirmed that the manufactured composite filter had a cube shape.
  • Example 4 As a result of manufacturing a composite filter in the same manner as in Example 4, except that only an aqueous platinum hydrochloric acid solution was used as the aqueous metal precursor solution in Example 4, it was confirmed that the manufactured composite filter had a cube shape.
  • Example 4 As a result of manufacturing a composite filter in the same manner as in Example 4, except that only an aqueous palladium nitrate solution was used as the aqueous metal precursor solution in Example 4, it was confirmed that the manufactured composite filter had a cube shape.
  • the prepared composite filter was mounted as a mobile filter in the air purifier of FIG. 7 to confirm the efficiency of removing fine dust.
  • the composite filter rotated like a ball in the lottery machine by the introduced air, and as a result of calculating the removal efficiency, the removal efficiency of fine dust (PM10) was 99.7% at the air injection speed of 2.5 m/s It was confirmed that the removal efficiency of ultrafine dust (PM2.5) was 98.8%, and it was confirmed that the removal efficiency of fine dust (PM10) was high as 85.3% even at a high speed of 9.5 m/s.
  • the QF value of the fine dust (PM10) at the speed of 2.5 m/s is 0.9202 Pa -1
  • the m-QF value was 2.301 m/s ⁇ Pa
  • the QF value of ultrafine dust (PM2.5) was 0.737 Pa -1
  • the m-QF value was 1.843 m/s ⁇ Pa
  • the speed of 9.5 m/s It was confirmed that the QF value of fine dust (PM10) was 0.099 Pa -1 and the m-QF value was 0.941 m/s ⁇ Pa.
  • the composite filter according to the present invention not only exhibits high-efficiency filter performance, but also has remarkably excellent filter performance compared to the injected speed.
  • the inside of the air purifier is 15 minutes. It was confirmed that 24 mg/m 3 of fine dust (PM10) and 12 mg/m 3 of ultrafine dust (PM2.5) remained.
  • the residual amount is a “good” level according to the Air Qualiy Guideline of the World Health Organization (WHO), which is less than 30 mg/m 3 of PM10 and 15 mg/m 3 of PM2.5, for a short time. It was confirmed that the air quality in the interior was improved to a good level.
  • WHO World Health Organization
  • the composite filter of Example 11 manufactured in an air purifier including an air inlet through which air containing fine dust is introduced and an outlet through which the purified air is discharged is applied as a fixed filter to obtain fine dust (PM10).
  • the removal efficiency was more than 95%, and at a speed of 2.5 m/s, 10,000 mg/m 3 of fine dust (PM10) and 3,000 mg/m 3 of ultrafine dust (PM2.
  • the air quality was improved to a level of “good” in 23 minutes.

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  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Materials (AREA)

Abstract

The present invention relates to a fine dust filter and an air purifier having the filter mounted thereon and, more particularly, to a high-performance air purifier which: includes, as a movable filter, a composite filter that has excellent fine dust removal efficiency and is reusable; and can quickly remove fine dust while maintaining a low pressure drop even under a high flow rate.

Description

유동형 미세먼지 필터 탑재 공기청정기Air purifier with fluid fine dust filter

본 발명은 미세먼지 필터 및 이를 탑재한 공기청정기에 관한 것으로, 보다 구체적으로는 우수한 미세먼지 제거효율을 나타내며 재사용이 가능한 복합 필터를 이동형 필터로 포함하며, 높은 유속에서도 낮은 압력강하를 유지하며 빠르게 미세먼지의 제거가 가능한 고성능 공기청정기에 관한 것이다.The present invention relates to a fine dust filter and an air purifier equipped with the same, and more specifically, a composite filter that exhibits excellent fine dust removal efficiency and is reusable as a mobile filter, maintains a low pressure drop even at a high flow rate, It relates to a high-performance air purifier capable of removing dust.

최근, 자동차 및 공장에서 배출되는 매연뿐 아니라, 인접한 중국 발 오염물질의 유입으로 인한 미세먼지가 우리나라의 심각한 국가적, 사회적, 환경적 문제로 대두되고 있다.Recently, not only exhaust from automobiles and factories, but also fine dust caused by the inflow of pollutants from neighboring China has emerged as a serious national, social, and environmental problem in Korea.

미세먼지(Particulate Matter, PM)는 황산염, 질산염, 염소, 탄소, 철 및 중금속 등으로 구성되며, 이들의 크기에 따라 공기역학적 입경이 10 μm인 경우 PM10, 2.5 μm 이하의 초미세먼지인 경우 PM2.5로 분류된다. 이러한 미세먼지는 입자가 매우 작아 사람의 기관지로 쉽게 침투가 가능하여, 호흡계 질환, 심혈관계 질환, 심지어 암까지 유발한다.Particulate Matter (PM) is composed of sulfate, nitrate, chlorine, carbon, iron and heavy metals, depending on their size, PM10 for aerodynamic particle diameter of 10 μm, PM2 for ultrafine dust of 2.5 μm or less Classified as .5. These fine dust particles are very small and can easily penetrate into human bronchi, causing respiratory diseases, cardiovascular diseases, and even cancer.

미세먼지를 제거하기 위하여 종래 프리필터, 카본필터, 헤파필터(High Efficiency Particulate Air Filter, HEPA) 및 섬유 구조의 극성 멤브레인(membrane)과 같은 다양한 필터가 개발되고 있다.In order to remove fine dust, various filters such as a pre-filter, a carbon filter, a HEPA filter (High Efficiency Particulate Air Filter, HEPA), and a fiber-structured polar membrane have been developed.

그러나, 현재까지 개발된 미세먼지 필터는 제작 및 처리 과정에서 고에너지의 정밀공정을 거쳐야 한다는 단점이 있다.However, the fine dust filter developed to date has a disadvantage in that it must undergo a high-energy precision process in the manufacturing and processing process.

또한, 상기 필터는 미세먼지를 영구적으로 제거하는 것이 아니라 단지 미세먼지를 포집하는 것으로서, 일정시간 후에는 미세먼지 제거효율이 감소하게 되는 문제점이 있다. 구체적으로, 필터의 미세먼지 포집량이 증가하면 할수록 필터에 걸러진 미세먼지가 남아 제거효율이 감소하게 되고, 결국 새로운 필터로 교체하여 사용해야 하는 경제적인 문제점이 있다.In addition, the filter does not permanently remove fine dust, but only collects fine dust, and there is a problem in that the efficiency of removing fine dust decreases after a certain time. Specifically, as the amount of fine dust collected by the filter increases, the removal efficiency of the filter remains and the removal efficiency decreases, and as a result, there is an economic problem that must be replaced with a new filter.

한편, 미세먼지 제거효율을 향상시키기 위하여, 필터의 구조를 복잡하게 만들거나 두께를 증가시킴으로써 공기가 필터를 통과함에 따라 흡착되는 미세먼지의 양을 증가시켜 효율을 향상시키는 방법이 이용되고 있다.Meanwhile, in order to improve the efficiency of removing fine dust, a method of improving the efficiency by increasing the amount of fine dust adsorbed as air passes through the filter by complicating the structure of the filter or increasing the thickness is used.

그러나 상기 방법의 경우, 공기가 복잡하고 두꺼운 필터를 통과함에 따라 필터에 높은 압력강하(△P: P in put - P out put)가 발생하여 높은 에너지 소비가 불가피하다. 또한, 고속 필터 시에는 압력강하가 현저히 증가하고 제거효율이 낮기 때문에 일반적으로 0.1 내지 0.5 m/s의 낮은 필터 속도를 유지할 수밖에 없으며, 제거효율의 향상 또한 한계가 있는 실정이다.However, in the case of the above method, as air passes through a complex and thick filter, a high pressure drop (ΔP: P in put -P out put ) occurs in the filter, resulting in high energy consumption. In addition, in the case of a high-speed filter, since the pressure drop is significantly increased and the removal efficiency is low, it is inevitable to maintain a low filter speed of 0.1 to 0.5 m/s in general, and the improvement of the removal efficiency is also limited.

뿐만 아니라, 종래 미세먼지 필터는 모두 공기청정기 내부에 고정되어 있는 고정형 필터로서, 공기가 필터에 유입될 때 이러한 고정형 필터에 의해 공기의 흐름이 방해되어 수백 Pa의 높은 압력강하가 발생된다.In addition, conventional fine dust filters are all fixed filters that are fixed inside the air purifier, and when air is introduced into the filter, the flow of air is obstructed by the fixed filter, resulting in a high pressure drop of several hundreds Pa.

이에, 낮은 압력강하에서도 고속 및 고성능으로 미세먼지의 제거가 가능한 이동형의 필터, 구체적으로는 공기 흐름에 의해 유동성을 가지며, 재사용이 가능한 미세먼지 제거용 필터의 개발이 절실히 요구되고 있다.Accordingly, there is an urgent need to develop a movable filter capable of removing fine dust at high speed and high performance even under a low pressure drop, specifically a filter for removing fine dust that has fluidity by air flow and can be reused.

본 발명의 목적은 우수한 미세먼지(PM10) 및 초미세먼지(PM2.5) 제거효율을 가지며, 세척하여 재사용하여도 높은 미세먼지 제거효율을 나타내는 복합 필터 및 이의 제조방법을 제공하는 것이다.An object of the present invention is to provide a composite filter having excellent fine dust (PM10) and ultrafine dust (PM2.5) removal efficiency, and exhibiting high fine dust removal efficiency even when washed and reused, and a manufacturing method thereof.

또한 본 발명의 목적은 공기 흐름에 의하여 유동성을 가짐에 따라 이동형상 필터로 사용이 가능한 복합 필터를 제공하는 것이다.It is also an object of the present invention to provide a composite filter that can be used as a movable filter as it has fluidity by air flow.

또한 본 발명의 목적은 이동형 필터를 포함하며, 낮은 압력강하를 유지하며 빠르게 미세먼지 제거가 가능한 동시에 높은 미세먼지 제거효율을 갖는 공기청정기에 관한 것이다.In addition, an object of the present invention relates to an air purifier comprising a movable filter, maintaining a low pressure drop, and capable of rapidly removing fine dust and at the same time having a high fine dust removal efficiency.

상기 목적을 달성하기 위한 본 발명은 a) 필터기재를 금속 전구체 수용액에 투입하여 에칭하는 것과 동시에 상기 금속 전구체를 코팅하는 단계; 및 b) 상기 필터기재에 코팅된 금속 전구체를 금속입자로 환원시키는 단계;를 포함하는 복합 필터의 제조방법을 제공한다.The present invention for achieving the above object comprises the steps of: a) adding a filter substrate to an aqueous metal precursor solution to etching and simultaneously coating the metal precursor; And b) reducing the metal precursor coated on the filter substrate to metal particles.

본 발명의 일 양태에서, 상기 필터기재는 멜라민 수지 발포체일 수 있다.In one aspect of the present invention, the filter base material may be a melamine resin foam.

본 발명의 일 양태에서, 상기 금속 전구체는 귀금속류에서 선택되는 어느 하나 또는 둘 이상의 금속의 수산화물, 할로겐화물 또는 질산화물인 것일 수 있다.In one aspect of the present invention, the metal precursor may be a hydroxide, halide, or nitric oxide of any one or two or more metals selected from precious metals.

본 발명의 일 양태에서, 상기 금속 전구체는 은, 백금 및 팔라듐 전구체의 혼합 전구체일 수 있다.In one aspect of the present invention, the metal precursor may be a mixed precursor of silver, platinum, and palladium precursors.

본 발명의 일 양태에서, 상기 금속 전구체 수용액 내 금속 전구체 고형분의 함량은 1 내지 300 μM인 것일 수 있다.In one aspect of the present invention, the content of the solid content of the metal precursor in the aqueous metal precursor solution may be 1 to 300 μM.

본 발명의 일 양태에서, 상기 a) 단계의 에칭은 상기 필터기재를 구형으로 에칭시키는 것을 특징으로 하는 것일 수 있다.In one aspect of the present invention, the etching in step a) may be characterized in that the filter substrate is etched into a spherical shape.

본 발명의 일 양태에서, 상기 b) 단계 이후에 금속 입자가 코팅된 필터기재에 친수성 처리 및 자성 처리하는 단계를 더 포함하는 것일 수 있다.In one aspect of the present invention, after the step b), a step of hydrophilic treatment and magnetic treatment on the filter substrate coated with metal particles may be further included.

또한 본 발명은 에칭된 표면에 은, 백금 및 팔라듐에서 선택되는 어느 하나 또는 둘 이상의 혼합금속 입자가 코팅된 복합 필터를 제공한다.In addition, the present invention provides a composite filter in which any one or two or more mixed metal particles selected from silver, platinum and palladium are coated on the etched surface.

본 발명의 일 양태에서, 상기 복합 필터는 상기 복합 필터는 친수성 및 자성 처리된 것일 수 있다.In one aspect of the present invention, the composite filter may be hydrophilic and magnetically treated.

본 발명의 일 양태에서, 상기 복합 필터는 미세먼지(PM10) 및 초미세먼지(PM2.5)의 제거효율이 85% 이상인 것일 수 있다.In one aspect of the present invention, the composite filter may have a removal efficiency of 85% or more of fine dust (PM10) and ultrafine dust (PM2.5).

본 발명의 일 양태에서, 상기 복합 필터는 1 내지 500 mm의 지름을 갖는 구형인 것을 특징으로 하는 것일 수 있다.In one aspect of the present invention, the composite filter may be characterized in that it has a spherical shape having a diameter of 1 to 500 mm.

또한 본 발명은 상기 복합 필터를 공기정화용 필터로 포함하는 공기청정기를 제공한다.In addition, the present invention provides an air purifier comprising the composite filter as a filter for air purification.

본 발명의 일 양태에서, 상기 공기청정기는 공기 유입부, 상기 복합 필터를 탑재한 챔버 및 공기 배출부를 포함하며, 상기 복합 필터는 유입되는 공기의 흐름에 의해 유동성을 가지는 이동형 필터일 수 있다.In one aspect of the present invention, the air purifier includes an air inlet, a chamber mounted with the composite filter, and an air outlet, and the composite filter may be a movable filter having fluidity by the flow of incoming air.

본 발명의 일 양태에서, 상기 공기청정기는 유입되는 공기에 의해 상기 복합 필터가 회전하는 것을 특징으로 하는 로또 머신형인 것일 수 있다.In one aspect of the present invention, the air purifier may be of a lotto machine type, characterized in that the composite filter is rotated by incoming air.

본 발명의 일 양태에서, 상기 공기청정기는 50 Pa 이하의 압력 강하(△P)에서 1.0 m/s 이상의 필터 속도로 미세먼지(PM10) 및 초미세먼지(PM2.5)의 제거가 가능한 것일 수 있다.In one aspect of the present invention, the air purifier may be capable of removing fine dust (PM10) and ultrafine dust (PM2.5) at a filter speed of 1.0 m/s or more in a pressure drop (ΔP) of 50 Pa or less. have.

본 발명에 따른 미세먼지 필터는 미세먼지(PM10) 및 초미세먼지(PM2.5)에 대한 제거효율이 우수하고, 탄성 및 기계적 물성이 우수하며, 세척하여 재사용이 가능한 장점이 있다.The fine dust filter according to the present invention has the advantage of excellent removal efficiency for fine dust (PM10) and ultrafine dust (PM2.5), excellent elasticity and mechanical properties, and can be washed and reused.

본 발명에 따른 미세먼지 필터는 공기에 의해 유동성을 가지며 이동형 필터로 적용이 가능하여 필터에 발생되는 압력강하가 낮은 장점이 있다.The fine dust filter according to the present invention has fluidity by air and can be applied as a movable filter, so that the pressure drop generated in the filter is low.

본 발명에 따른 미세먼지 필터를 포함하는 공기청정기는 50 Pa 이하의 낮은 압력강하(△P)에서 고속으로 미세먼지의 제거가 가능할 뿐만 아니라, 단시간 내 공기질을 현저히 개선시킬 수 있는 장점이 있다.The air purifier including the fine dust filter according to the present invention has the advantage of not only being able to remove fine dust at high speed at a low pressure drop (ΔP) of 50 Pa or less, but also remarkably improving air quality within a short time.

도 1은 본 발명의 일 양태에 따른 복합필터 제조방법의 흐름도이다.1 is a flow chart of a method for manufacturing a composite filter according to an aspect of the present invention.

도 2는 본 발명의 일 양태에 따른 로또 머신형의 이동형 공기청정기의 도식도이다.2 is a schematic diagram of a lottery machine-type mobile air purifier according to an aspect of the present invention.

도 3은 본 발명의 일 양태에 따른 에칭된 발포체의 육안 사진이다.3 is a visual photograph of an etched foam according to an aspect of the present invention.

도 4는 본 발명의 일 양태에 따른 복합 필터의 육안 사진이다.4 is a naked eye photograph of a composite filter according to an aspect of the present invention.

도 5는 본 발명의 일 양태에 따른 복합필터 표면의 주사전자현미경(Scanning Electron Microscope, SEM) 분석 사진이다.5 is a scanning electron microscope (SEM) analysis photograph of the surface of a composite filter according to an embodiment of the present invention.

도 6은 본 발명의 일 양태에 따른 복합필터의 에너지 분산 스펙트럼(Energy Dispersive Spectrometer, EDS) 분석 결과이다.6 is an energy dispersive spectrum (EDS) analysis result of a composite filter according to an embodiment of the present invention.

도 7은 본 발명의 일 양태에 따른 로또 머신형의 이동형 공기청정기의 육안 사진이다.7 is a visual photograph of a lottery machine-type mobile air purifier according to an aspect of the present invention.

도 8은 본 발명의 일 양태에 따른 복합필터의 미세먼지 및 초미세먼지 제거효율을 나타낸 그래프이다.8 is a graph showing the fine dust and ultrafine dust removal efficiency of the composite filter according to an aspect of the present invention.

도 9는 본 발명의 일 양태에 따른 복합필터의 크기에 따른 미세먼지 및 초미세먼지 제거효율을 나타낸 그래프이다.9 is a graph showing fine dust and ultrafine dust removal efficiency according to the size of a composite filter according to an embodiment of the present invention.

도 10은 본 발명의 일 양태에 따른 복합필터의 정전기 전압 측정 그래프이다.10 is a graph of measuring electrostatic voltage of a composite filter according to an embodiment of the present invention.

도 11은 본 발명의 일 양태에 따른 복합필터의 반복 사용에 따른 미세먼지 및 초미세먼지 제거효율을 나타낸 그래프이다.11 is a graph showing fine dust and ultrafine dust removal efficiency according to repeated use of a composite filter according to an aspect of the present invention.

도 12는 본 발명의 일 양태에 따른 고정형 공기청정기의 육안 사진이다.12 is a naked eye photograph of a fixed air purifier according to an aspect of the present invention.

이하 첨부된 도면들을 포함한 구체예 또는 실시예를 통해 본 발명을 더욱 상세히 설명한다. 다만 하기 구체예 또는 실시예는 본 발명을 상세히 설명하기 위한 하나의 참조일 뿐 본 발명이 이에 한정되는 것은 아니며, 여러 형태로 구현될 수 있다. Hereinafter, the present invention will be described in more detail through specific examples or examples including the accompanying drawings. However, the following specific examples or examples are only one reference for describing the present invention in detail, and the present invention is not limited thereto, and may be implemented in various forms.

또한 달리 정의되지 않는 한, 모든 기술적 용어 및 과학적 용어는 본 발명이 속하는 당업자 중 하나에 의해 일반적으로 이해되는 의미와 동일한 의미를 갖는다. 본 발명에서 설명에 사용되는 용어는 단지 특정 구체예를 효과적으로 기술하기 위함이고 본 발명을 제한하는 것으로 의도되지 않는다. In addition, unless otherwise defined, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. The terms used in the description in the present invention are merely intended to effectively describe specific embodiments and are not intended to limit the present invention.

또한 명세서 및 첨부된 특허청구범위에서 사용되는 단수 형태는 문맥에서 특별한 지시가 없는 한 복수 형태도 포함하는 것으로 의도할 수 있다.In addition, the singular form used in the specification and the appended claims may be intended to include the plural form unless otherwise indicated in the context.

본 발명은 미세먼지(PM10) 및 초미세먼지(PM2.5)에 대한 제거효율이 우수하며 이동형 필터로 사용이 가능한 복합 필터의 제조방법에 관한 것으로, 구체적으로 a) 필터기재를 금속 전구체 수용액에 투입하여 에칭하는 것과 동시에 상기 금속 전구체를 코팅하는 단계; 및 b) 상기 필터기재에 코팅된 금속 전구체를 금속입자로 환원시키는 단계;를 포함하는 복합 필터의 제조방법을 제공한다.The present invention relates to a method of manufacturing a composite filter that has excellent removal efficiency for fine dust (PM10) and ultrafine dust (PM2.5) and can be used as a mobile filter, and specifically, a) a filter base material in an aqueous metal precursor solution Coating the metal precursor at the same time as the input and etching; And b) reducing the metal precursor coated on the filter substrate to metal particles.

본 발명에 따른 필터의 제조방법을 구체적으로 살펴보면, 상기 a) 단계에서 필터기재를 금속 전구체 수용액에 투입하여 교반함에 따라, 상기 금속 전구체가 필터기재를 에칭시키며, 이와 동시에 금속 전구체가 에칭된 필터기재의 표면에 코팅될 수 있다.Looking specifically at the method of manufacturing the filter according to the present invention, in step a), as the filter substrate is added to the aqueous metal precursor solution and stirred, the metal precursor etch the filter substrate, and at the same time, the filter substrate in which the metal precursor is etched. It can be coated on the surface of.

또한, 상기 필터기재 표면에 코팅된 금속 전구체는 b) 단계에서 환원됨에 따라 금속 입자가 코팅된 복합 필터를 제조할 수 있다.In addition, as the metal precursor coated on the surface of the filter substrate is reduced in step b), a composite filter coated with metal particles may be manufactured.

본 발명의 일 양태에서, 상기 필터기재는 먼지, 미세먼지 및 초미세먼지 등 공기 중의 오염물질을 흡착하여 제거할 수 있는 공지의 필터 소재라면 제한 없이 사용될 수 있으며, 구체적으로 예를 들면, 면 섬유 및 수지 발포체에서 선택되는 어느 하나 또는 둘 이상의 혼합물일 수 있다.In one aspect of the present invention, the filter substrate may be used without limitation as long as it is a known filter material capable of adsorbing and removing pollutants in the air such as dust, fine dust, and ultrafine dust, and specifically, for example, cotton fiber And it may be any one or a mixture of two or more selected from the resin foam.

또한, 상기 수지 발포체로서 예를 들면, 폴리우레탄 발포체, 우레아 발포체, 폴리염화비닐 발포체, 폴리프로필렌 발포체, 폴리에틸렌 발포체, 폴리비닐아세테이트 발포체, 멜라민 수지 발포체, 페놀 수지 발포체 및 이들의 유도체 수지의 발포체에서 선택되는 어느 하나 또는 둘 이상이 적층 또는 접합된 것을 들 수 있으나, 이에 제한되는 것은 아니다.In addition, as the resin foam, for example, it is selected from polyurethane foam, urea foam, polyvinyl chloride foam, polypropylene foam, polyethylene foam, polyvinyl acetate foam, melamine resin foam, phenol resin foam, and foams of derivative resins thereof. Any one or two or more to be laminated or bonded may be mentioned, but the present invention is not limited thereto.

본 발명의 필터기재로서 바람직하게는 멜라민 수지 발포체를 사용하는 것일 수 있으며, 가장 바람직하게는 상기 멜라민 수지 발포체로서 멜라민 포름알데히드 발포체를 사용하는 것일 수 있다. 상기 멜라민 포름알데히드 발포체의 형상은 옷감 혹은 천의 형태를 가질 수 있으며, 바람직하게는 스폰지 형태일 수 있으나, 이에 제한되는 것은 아니다. 상기의 멜라민 수지 발포체는 a) 단계에서 금속 전구체에 의해 효과적으로 에칭될 수 있을 뿐 아니라, 공기청정을 위한 필터 소재로서 적합한 탄성 및 기계적 물성을 나타낼 수 있다.As the filter base material of the present invention, a melamine resin foam may be preferably used, and most preferably, a melamine formaldehyde foam may be used as the melamine resin foam. The shape of the melamine formaldehyde foam may be in the form of cloth or cloth, preferably in the form of a sponge, but is not limited thereto. The melamine resin foam may be effectively etched by a metal precursor in step a), and may exhibit elastic and mechanical properties suitable as a filter material for air cleaning.

또한, 이 후 b) 단계를 통해 상기 멜라민 수지 발포체의 에칭된 표면에 금속 입자를 코팅시킴으로써 미세먼지 및 초미세먼지를 흡착시키는 효과가 향상되어 우수한 제거효율을 갖는 장점이 있다.In addition, by coating metal particles on the etched surface of the melamine resin foam through step b) afterwards, the effect of adsorbing fine dust and ultrafine dust is improved, thereby having excellent removal efficiency.

일반적으로, 시간이 지남에 따라 필터에 흡착되는 오염물질의 양이 증가하여 필터의 성능이 저하되는데, 상기 멜라민 수지 발포체로 제조된 본 발명의 복합 필터를 사용하는 경우, 세척하여 재사용이 가능할 뿐만 아니라 재사용하여도 높은 제거효율이 그대로 유지되는 효과가 우수하다.In general, the amount of contaminants adsorbed to the filter increases over time and the performance of the filter decreases. In the case of using the composite filter of the present invention made of the melamine resin foam, it can be washed and reused. Excellent effect of maintaining high removal efficiency even after reuse.

본 발명의 일 양태에서, 상기 금속 전구체는 필터기재의 일부를 에칭, 즉 제거함으로써 필터기재의 표면적을 높이고, 코팅되는 금속의 접착성을 향상시키기 위한 것으로서, 귀금속류에서 선택되는 어느 하나 또는 둘 이상의 금속의 수산화물(hydroxide), 할로겐화물(halide) 또는 질산화물(nitrate)일 수 있으나, 이에 제한되는 것은 아니다.In one aspect of the present invention, the metal precursor is to increase the surface area of the filter substrate by etching, that is, removing a part of the filter substrate, and to improve the adhesion of the coated metal, and any one or two or more metals selected from precious metals It may be a hydroxide, a halide, or a nitrate, but is not limited thereto.

구체적으로 예를 들면, 상기 금속 전구체로서 은, 금, 백금, 팔라듐, 마그네슘, 동, 니켈 및 지르코늄 등을 들 수 있으며, 바람직하게는 은, 백금 및 팔라듐에서 선택되는 어느 하나 또는 둘 이상의 금속의 수산화물, 할로겐화물 또는 질산화물의 수용액을 사용하여 상기 필터기재를 에칭하는 것과 동시에 금속 전구체로 코팅시킬 수 있다.Specifically, for example, the metal precursor may include silver, gold, platinum, palladium, magnesium, copper, nickel, zirconium, etc., preferably, a hydroxide of any one or two or more metals selected from silver, platinum and palladium , The filter substrate may be etched using an aqueous solution of halide or nitric oxide and coated with a metal precursor.

상기 금속 전구체로서 보다 구체적으로 예를 들면, 질산은, 백금염화수소산 및 질산팔라듐에서 선택되는 어느 하나 또는 둘 이상의 혼합물을 사용하는 것일 수 있으며, 이 경우 필터기재를 보다 효과적으로 에칭시킬 수 있을 뿐만 아니라, 필터기재 표면에 코팅되기 매우 용이하다.More specifically, as the metal precursor, for example, any one or a mixture of two or more selected from silver nitrate, platinum hydrochloric acid and palladium nitrate may be used, and in this case, not only the filter substrate can be etched more effectively, but also the filter It is very easy to be coated on the surface of the substrate.

본 발명의 금속 전구체로서 가장 바람직하게는 은, 백금 및 팔라듐의 서로 다른 3종의 혼합 전구체를 사용하는 것일 수 있으며, 상기 3종의 혼합 전구체를 사용함에 따라 필터기재를 구형으로 에칭시킬 수 있다.As the metal precursor of the present invention, most preferably, three different mixed precursors of silver, platinum, and palladium may be used, and the filter substrate may be etched into a spherical shape by using the three types of mixed precursors.

이를 구체적으로 살펴보면, 금속 전구체 수용액으로서 질산은 수용액, 백금염화수소산 수용액 및 질산팔라듐 수용액의 혼합 전구체 용액을 사용하는 경우, a) 단계에서 투입된 필터기재가 정구형의 형태로 에칭되는 효과가 우수하며, 이에 따라 제조되는 복합 필터는 금속 입자가 코팅된 구형의 복합 필터로 제조될 수 있다.Specifically, when a mixed precursor solution of a silver nitrate aqueous solution, a platinum hydrochloric acid aqueous solution, and a palladium nitrate aqueous solution is used as the metal precursor aqueous solution, the filter substrate introduced in step a) has an excellent effect of being etched in a spherical shape. The manufactured composite filter may be manufactured as a spherical composite filter coated with metal particles.

본 발명의 일 양태에서, 상기 a) 단계의 에칭은 상기 필터기재를 구형으로 에칭시키는 것을 특징으로 하는 것이다.In one aspect of the present invention, the etching in step a) is characterized in that the filter substrate is etched into a spherical shape.

구체적으로, 본 발명의 a) 단계는 필터기재를 금속 전구체로서 에칭시킴에 따라 다양한 형태로 에칭된 복합 필터를 제조할 수 있는데, 상기 금속 전구체로서 은, 백금 및 팔라듐의 서로 다른 3종의 혼합 전구체를 사용하는 경우, 구형의 복합 필터로 제조가 가능하다.Specifically, step a) of the present invention may prepare a composite filter etched in various forms by etching the filter substrate as a metal precursor. As the metal precursor, three different mixed precursors of silver, platinum and palladium When using, it is possible to manufacture a composite filter of a spherical shape.

이에 따라, 복합 필터의 표면적이 향상되어 보다 많은 양의 오염물질, 즉 미세먼지 및 초미세먼지를 흡착하여 제거함으로써 제거효율이 현저히 증대될 수 있다.Accordingly, the surface area of the composite filter is improved, so that a larger amount of contaminants, that is, fine dust and ultrafine dust, is adsorbed and removed, thereby remarkably increasing the removal efficiency.

또한, 상기 구형의 복합 필터를 공기청정기에 적용하는 경우, 공기청정기 내부로 유입되는 공기의 흐름에 의해 구형의 필터가 용이하게 회전함에 따라 이동형 필터로서 미세먼지를 빠르게 제거할 수 있는 장점이 있다.In addition, when the spherical composite filter is applied to an air purifier, the spherical filter is easily rotated by the flow of air introduced into the air purifier, so that fine dust can be quickly removed as a mobile filter.

특히, 본 발명의 멜라민 수지 발포체를 필터기재로 사용하여 에칭하는 경우, 다양한 크기를 갖는 구형의 복합 필터로 제조가 가능하며, 탄성 및 내충격성이 우수하여 높은 제거효율을 유지하며 오랫동안 사용할 수 있어 경제적이다.In particular, in the case of etching using the melamine resin foam of the present invention as a filter substrate, it can be manufactured as a spherical composite filter having various sizes, and it maintains high removal efficiency due to excellent elasticity and impact resistance and can be used for a long time, so it is economical to be.

뿐만 아니라, 종래 고정형 필터의 경우 공기청정기 내부에 고정되어 있어 유입되는 공기의 흐름을 방해함에 따라, 압력강하(△P: P in put - P out put)가 현저히 높고 고속 필터가 불가능하였으나, 본 발명의 필터는 구형의 이동형 필터로서 낮은 압력강하에서 작동 가능하며 제거효율의 저하 없이 고속으로 필터가 가능하다.In addition, in the case of the conventional fixed type filter, since it is fixed inside the air purifier, the pressure drop (ΔP: P in put -P out put ) is remarkably high and high-speed filter is impossible, but the present invention The filter of is a spherical mobile filter that can operate at low pressure drop and can filter at high speed without deteriorating removal efficiency.

본 발명의 일 양태에서, 상기 금속 전구체 수용액 내 금속 전구체 고형분의 함량은 1 내지 300 μM, 구체적으로 2 내지 100 μM, 보다 구체적으로 5 내지 60 μM인 것일 수 있으며, 상기 금속 전구체 수용액의 pH는 pH 1 내지 7, 구체적으로 pH 2 내지 5일 수 있으나, 상기 범위로 제한되는 것은 아니다.In one aspect of the present invention, the content of the metal precursor solid content in the metal precursor aqueous solution may be 1 to 300 μM, specifically 2 to 100 μM, more specifically 5 to 60 μM, and the pH of the metal precursor aqueous solution is pH It may be 1 to 7, specifically pH 2 to 5, but is not limited to the above range.

상기 범위의 함량 및 pH 범위를 모두 만족하는 경우, 필터기재가 구형으로 에칭되는 효과가 뛰어나고, 이 후 b) 단계에서 금속 전구체의 환원을 통해 제조된 복합 필터가 현저히 향상된 미세먼지 및 초미세먼지 제거효율을 나타낸다.When both the content and the pH range of the above range are satisfied, the effect of etching the filter substrate into a spherical shape is excellent, and after that, the composite filter manufactured through reduction of the metal precursor in step b) significantly improved fine dust and ultrafine dust removal. Indicates efficiency.

본 발명의 a) 필터기재를 에칭 및 금속 전구체 코팅시키는 단계에서 상기 필터기재를 금속 전구체 수용액에 투입하는 방법은 구체적으로, 1 내지 500 mm, 구체적으로 1 내지 50 mm의 정육면체 모양으로 절단한 필터기재 1 내지 100 개를 금속 전구체 수용액 50 내지 1,000 mL에 침지하는 것일 수 있으며, 예를 들어 디핑(dipping), 분무, 이머징(immersing), 퀀칭(quenching) 등 필터기재 표면에 금속 전구체 수용액을 접촉시킬 수 있는 모든 방법을 의미한다.In the step of a) etching the filter substrate and coating the metal precursor of the present invention, the method of introducing the filter substrate into the aqueous metal precursor solution is specifically, the filter substrate cut into a cube shape of 1 to 500 mm, specifically 1 to 50 mm. 1 to 100 may be immersed in 50 to 1,000 mL of the metal precursor aqueous solution, for example, dipping, spraying, immersing, quenching, etc., may be brought into contact with the surface of the filter substrate. Means all the way.

또한 필터기재를 에칭하는 방법은 구체적으로, 필터기재를 금속 전구체 수용액에서 10 내지 60℃의 온도에서 1 내지 96 시간, 구체적으로 20 내지 40℃의 온도에서 24 내지 72 시간 교반하는 것일 수 있으나, 이에 제한되는 것은 아니다. 상기 온도 및 시간 범위에서 필터기재를 에칭시킴으로써 정구형의 복합 필터로 제조하기에 용이하다.In addition, the method of etching the filter substrate may be specifically, stirring the filter substrate in an aqueous metal precursor solution at a temperature of 10 to 60°C for 1 to 96 hours, specifically at a temperature of 20 to 40°C for 24 to 72 hours. It is not limited. By etching the filter substrate in the above temperature and time range, it is easy to manufacture a regular spherical composite filter.

다음으로, 본 발명의 b) 단계는 a) 단계에서 에칭된 필터기재 표면에 코팅된 금속 전구체를 금속 입자로 환원시키는 단계로서, 공지의 환원제를 이용한 환원방법으로 수행될 수 있다.Next, step b) of the present invention is a step of reducing the metal precursor coated on the surface of the filter substrate etched in step a) into metal particles, and may be performed by a reduction method using a known reducing agent.

상기 환원제로서 예를 들면, 수소화붕소나트륨(sodium borohydroride), 에틸렌글리콜(ethylene glycol), 디에틸렌글리콜(diethylene glycol), 트리에틸렌글리콜(triethylene glycol), 테트라에틸렌글리콜(tetraethylene glycol), 디프로필렌글리콜(dipropylene glycol), 프로판디올(propandiol) 및 부탄디올(butanediol)과 같은 알콜류 및 포름알데히드와 같은 알데히드류에서 선택되는 어느 하나 또는 둘 이상의 혼합물의 수용액일 수 있으나, 이에 제한되는 것은 아니다.As the reducing agent, for example, sodium borohydroride, ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol ( dipropylene glycol), propandiol, and alcohols such as butanediol, and an aqueous solution of any one or a mixture of two or more selected from aldehydes such as formaldehyde, but is not limited thereto.

또한, 상기 환원제 수용액 내 환원제 고형분의 함량은 0.1 내지 20 mM, 구체적으로 1 내지 10 mM인 것일 수 있으나, 이에 제한되는 것은 아니다.In addition, the content of the reducing agent solid content in the reducing agent aqueous solution may be 0.1 to 20 mM, specifically 1 to 10 mM, but is not limited thereto.

상기 범위의 환원제 수용액을 a) 단계 반응이 끝난 후 투입하여 10 내지 60 분간 교반하여 금속 입자가 코는 증류수를 이용하여 세척함으로써 미반응물을 제거하는 단계 및 오븐 건조 등 공지의 건조 방법으로 건조시키는 단계를 더 포함할 수 있다.Step a) adding the aqueous reducing agent solution in the above range after the reaction is completed, stirring for 10 to 60 minutes, and washing with distilled water containing metal particles to remove unreacted substances and drying by a known drying method such as oven drying It may further include.

본 발명의 일 양태에서, 상기 b) 단계 이후에 금속 입자가 코팅된 복합 필터에 친수성 처리 및 자성 처리하는 단계를 더 포함할 수 있다.In one aspect of the present invention, after step b), a step of hydrophilic treatment and magnetic treatment to the composite filter coated with metal particles may be further included.

상기 a) 및 b) 단계를 통해 에칭된 표면에 금속 입자가 코팅된 복합 필터는 상기의 친수성 처리 및 자성 처리하는 단계를 포함함에 따라 표면에 친수성 및 자성을 부여할 수 있다.The composite filter in which the metal particles are coated on the surface etched through the steps a) and b) includes the hydrophilic treatment and magnetic treatment, thereby imparting hydrophilicity and magnetism to the surface.

상기 친수성 처리로서 구체적으로 예를 들면, 에틸렌글리콜, 디에틸렌글리콜 및 중량평균분자량 100 내지 1,000 g/mol, 구체적으로 200 내지 500 g/mol의 폴리에틸렌글리콜에서 선택되는 어느 하나 또는 둘 이상의 혼합물인 유체를 사용하여 복합 필터의 표면에 친수성을 부여하는 것일 수 있으며, 바람직하게는 에틸렌글리콜을 사용하는 것일 수 있다.Specifically, as the hydrophilic treatment, for example, any one or a mixture of two or more selected from polyethylene glycol having a weight average molecular weight of 100 to 1,000 g/mol, specifically 200 to 500 g/mol is used. It may be used to impart hydrophilicity to the surface of the composite filter, and preferably ethylene glycol may be used.

또한, 상기 자성 처리로서 구체적으로 예를 들면 철 입자를 복합 필터의 표면에 코팅시켜 자성을 부여하는 것일 수 있다.In addition, as the magnetic treatment, specifically, for example, iron particles may be coated on the surface of the composite filter to provide magnetism.

상기 친수성 및 자성 처리하는 방법으로 예를 들면, 상기 유체에 공지의 철 전구체 및 이의 환원제를 용해시킨 후, 150 내지 250℃의 고온에서 1 내지 12 시간 열처리한 후, 이를 세척하고 건조시켜 친수성의 자성 입자를 얻을 수 있다. 이어서, 상기 친수성 자성 입자를 에탄올에 분산시킨 후, 앞서 제조된 복합 필터를 투입하여 1 내지 60 분간, 구체적으로 10 내지 30 분간 초음파 처리하여 복합 필터에 친수성 및 자성을 부여하는 것일 수 있으나, 이에 제한되는 것은 아니다.In the hydrophilic and magnetic treatment method, for example, after dissolving a known iron precursor and a reducing agent thereof in the fluid, heat treatment at a high temperature of 150 to 250° C. for 1 to 12 hours, washing and drying it, Particles can be obtained. Subsequently, after dispersing the hydrophilic magnetic particles in ethanol, the previously prepared composite filter may be added and subjected to ultrasonic treatment for 1 to 60 minutes, specifically 10 to 30 minutes to impart hydrophilicity and magnetism to the composite filter, but is limited thereto. It does not become.

상기 철 전구체 및 환원제로서 특별히 제한되는 것은 아니나, 바람직하게는 철 전구체로서 염화제2철 및 브롬화제2철 등 공지의 할로겐화철의 수화물을 사용하는 것일 수 있으며, 환원제로서 아세트산나트륨을 사용하는 것일 수 있다.The iron precursor and the reducing agent are not particularly limited, but preferably, a hydrate of known iron halide such as ferric chloride and ferric bromide may be used as the iron precursor, and sodium acetate may be used as the reducing agent. have.

또한, 상기 철 전구체 및 환원제의 고형분 함량은 유체 100 중량부에 대하여 각각 1 내지 20 중량부, 구체적으로 2 내지 10 중량부로 사용하는 것일 수 있으나, 이에 제한되는 것은 아니다.In addition, the solid content of the iron precursor and the reducing agent may be 1 to 20 parts by weight, specifically 2 to 10 parts by weight, respectively, based on 100 parts by weight of the fluid, but is not limited thereto.

일반적으로, 미세먼지 및 초미세먼지는 극성을 띄며 공기 중의 수증기를 끌어당기는 성질을 가지고 있는데, 본 발명의 친수성 자성 입자가 코팅된 복합 필터를 사용하여 이를 제거하는 경우, 상기 친수성 자성 입자로 인해 필터의 극성 성질이 향상되어, 미세먼지를 흡착시키는 효과가 뛰어나다.In general, fine dust and ultrafine dust are polar and have a property of attracting water vapor in the air.When removing them using the composite filter coated with the hydrophilic magnetic particles of the present invention, the filter due to the hydrophilic magnetic particles The polar property of is improved and the effect of adsorbing fine dust is excellent.

특히, 상기 자성 처리에 사용되는 철 입자로 인하여 복합 필터의 표면 거칠기가 증가하여 복합 필터에 흡착되는 미세먼지와 초미세먼지의 양을 현저히 향상시킴으로써, 보다 높은 제거효율을 나타낼 수 있는 장점이 있다.In particular, due to the iron particles used in the magnetic treatment, the surface roughness of the composite filter is increased, and the amount of fine dust and ultrafine dust adsorbed on the composite filter is remarkably improved, thereby exhibiting a higher removal efficiency.

또한, 본 발명의 친수성 및 자성 처리된 복합 필터는 정전기적 인력에 의한 미세먼지 및 초미세먼지 흡착 효과가 뛰어나며, 구체적으로는 정전기 전압이 400 V 이상, 보다 구체적으로 500 V 내지 800 V의 높은 정전기 전압을 나타냄에 따라 미세먼지 흡착 성능이 매우 우수하다.In addition, the hydrophilic and magnetically treated composite filter of the present invention has excellent adsorption effect of fine dust and ultrafine dust due to electrostatic attraction, specifically, the electrostatic voltage is 400 V or more, more specifically 500 V to 800 V. As the voltage is displayed, the adsorption performance of fine dust is very good.

또한, 상기 복합 필터를 이동형 공기청정기 필터로 사용하는 경우, 압력강하의 증가 없이 빠른 속도로 미세먼지가 필터에 다량 흡착될 수 있어, 고속 및 고성능의 공기청정기의 구현이 가능한 장점이 있다.In addition, when the composite filter is used as a mobile air purifier filter, a large amount of fine dust can be adsorbed to the filter at a high speed without an increase in pressure drop, so that a high-speed and high-performance air purifier can be implemented.

뿐만 아니라, 상기 철 입자로 인하여 자성을 나타냄에 따라 공기정화용 필터 외에 분리막 등 다양한 분야로 적용될 수 있는 장점이 있다.In addition, as the iron particles exhibit magnetism, there is an advantage that can be applied to various fields such as separation membranes in addition to air purification filters.

본 발명은 상기의 제조방법으로 제조되며, 에칭된 표면에 은, 백금 및 팔라듐에서 선택되는 어느 하나 또는 둘 이상의 혼합금속 입자가 코팅된 복합 필터에 관한 것이다.The present invention relates to a composite filter manufactured by the above manufacturing method and coated with one or two or more mixed metal particles selected from silver, platinum, and palladium on the etched surface.

본 발명에 따른 복합 필터는 에칭된 표면에 상기 금속 입자가 코팅된 복합 필터로서, 우수한 미세먼지(PM10) 및 초미세먼지(PM2.5) 제거효율을 가지며, 세척하여 재사용하여도 높은 미세먼지 제거효율을 나타내는 장점이 있다.The composite filter according to the present invention is a composite filter in which the metal particles are coated on an etched surface, and has excellent fine dust (PM10) and ultrafine dust (PM2.5) removal efficiency, and high fine dust removal even when washed and reused It has the advantage of showing efficiency.

상기 복합 필터의 기재로서 예를 들면, 폴리우레탄 발포체, 우레아 발포체, 폴리염화비닐 발포체, 폴리프로필렌 발포체, 폴리에틸렌 발포체, 폴리비닐아세테이트 발포체, 멜라민 수지 발포체, 페놀 수지 발포체 및 이들의 유도체 수지의 발포체에서 선택되는 어느 하나 또는 둘 이상이 적층 또는 접합된 것일 수 있으며, 바람직하게는 멜라민 수지 발포체, 보다 바람직하게는 멜라민 포름알데히드 발포체일 수 있다.As the substrate of the composite filter, for example, it is selected from polyurethane foam, urea foam, polyvinyl chloride foam, polypropylene foam, polyethylene foam, polyvinyl acetate foam, melamine resin foam, phenol resin foam, and foams of derivative resins thereof. Any one or two or more may be laminated or bonded, preferably melamine resin foam, more preferably melamine formaldehyde foam.

또한, 상기 금속 입자로서 바람직하게는 은, 백금 및 팔라듐의 혼합 금속이 구형으로 에칭된 발포체의 표면에 코팅되어 코팅층을 형성하는 것일 수 있다.In addition, as the metal particles, preferably, a mixed metal of silver, platinum and palladium may be coated on the surface of a spherically etched foam to form a coating layer.

이에 따라, 복합 필터는 보다 많은 양의 오염물질, 즉 미세먼지 및 초미세먼지를 흡착하여 제거함으로써 제거효율이 현저히 우수하며, 낮은 압력강하에서도 제거효율의 저하 없이 고속으로 필터가 가능한 장점이 있다.Accordingly, the composite filter has the advantage of being remarkably excellent in removal efficiency by adsorbing and removing a larger amount of contaminants, that is, fine dust and ultra-fine dust, and enabling the filter at high speed without deteriorating the removal efficiency even at a low pressure drop.

또한, 상기 복합 필터는 상기 복합 필터는 친수성 및 자성 처리된 것일 수 있다.In addition, as for the composite filter, the composite filter may be hydrophilic and magnetically treated.

본 발명의 복합 필터가 친수성 및 자성 처리되어 상기 필터에 친수성 및 자성층을 더 포함하는 경우, 필터가 정전기적 인력에 의해 미세먼지를 흡착하는 성능이 현저히 우수하며, 정전기 전압이 향상되어 빠른 속도로 다량의 미세먼지를 흡착할 수 있는 장점이 있다.When the composite filter of the present invention is hydrophilic and magnetically treated to further include a hydrophilic and magnetic layer in the filter, the filter has remarkably excellent ability to adsorb fine dust by electrostatic attraction, and the electrostatic voltage is improved, resulting in a large amount at a high speed. It has the advantage of adsorbing fine dust.

본 발명에 따른 복합 필터는 미세먼지(PM10) 및 초미세먼지(PM2.5)의 제거효율이 85% 이상, 구체적으로 95% 이상, 보다 구체적으로 99% 이상인 것일 수 있다.The composite filter according to the present invention may have a removal efficiency of 85% or more, specifically 95% or more, and more specifically 99% or more of the fine dust PM10 and the ultrafine dust PM2.5.

이 때, 상기 제거효율은 하기 식 1에 따라 계산될 수 있다.In this case, the removal efficiency may be calculated according to Equation 1 below.

[식 1][Equation 1]

제거효율(%) = [(필터 전 미세먼지 농도-필터 후 미세먼지 농도)/필터 전 미세먼지 농도] X 100Removal efficiency (%) = [(fine dust concentration before filter-fine dust concentration after filter)/fine dust concentration before filter] X 100

또한, 상기 복합 필터는 다양한 크기 및 형태를 가질 수 있는데, 바람직하게는 1 내지 20 mm, 구체적으로 2 내지 10 mm의 지름을 갖는 구형인 것일 수 있다. 구체적으로, 상기 크기는 투입되는 필터기재In addition, the composite filter may have various sizes and shapes, preferably 1 to 20 mm, specifically may be a spherical one having a diameter of 2 to 10 mm. Specifically, the size is the filter substrate to be input

또한, 본 발명은 상기 복합 필터를 공기정화용 필터로 포함하는 공기청정기에 관한 것이다.In addition, the present invention relates to an air purifier comprising the composite filter as an air purification filter.

본 발명의 공기청정기는 도 2에 도시된 바와 같이, 공기 유입부, 복합 필터가 탑재된 챔버 및 공기 배출부를 포함하며, 구체적으로, 상기 챔버에 탑재된 복합 필터가 공기 유입부를 통해 유입되는 공기의 흐름에 의해 유동성을 가지는 이동형 필터일 수 있다. 이 때, 공기청정기는 향을 태워 포집한 미세먼지 입자가 유입되는 미세먼지 유입부를 더 포함하는 것일 수 있으나, 이에 제한되는 것은 아니다.The air purifier of the present invention includes an air inlet, a chamber equipped with a composite filter, and an air outlet, as shown in FIG. 2, and specifically, the composite filter mounted in the chamber is It may be a movable filter having fluidity by flow. In this case, the air purifier may further include a fine dust inlet through which fine dust particles collected by burning incense are introduced, but the present invention is not limited thereto.

또한, 상기 챔버는 복합 필터를 탑재할 수 있는 것이라면 제한 없이 사용할 수 있으며, 예를 들어 유리, 플라스틱, 금속 및 세라믹 등의 소재로 이루어진 것일 수 있다.In addition, the chamber may be used without limitation as long as it is capable of mounting a composite filter, and may be made of a material such as glass, plastic, metal, and ceramic.

또한, 본 발명의 공기청정기는 유입되는 공기에 의해 상기 복합 필터가 회전하는 것을 특징으로 하는 로또 머신형인 것일 수 있다.In addition, the air purifier of the present invention may be of a lottery machine type, characterized in that the composite filter is rotated by incoming air.

구체적으로, 본 발명의 복합 필터는 공기 흐름에 의하여 유동성을 가짐에 따라 이동형 필터로 적용이 가능한 것으로, 상기 공기 유입부 또는 미세먼지 유입부를 통해 유입되는 공기로 인해 구형의 복합 필터가 회전하면서 표면에 미세먼지 및 초미세먼지를 흡착시킬 수 있다.Specifically, the composite filter of the present invention can be applied as a mobile filter as it has fluidity by the air flow, and the spherical composite filter rotates on the surface due to the air introduced through the air inlet or fine dust inlet. It can adsorb fine dust and ultrafine dust.

본 발명의 일 양태에서, 상기 공기청정기는 50 Pa 이하의 압력 강하(△P)에서 1.0 m/s 이상의 필터 속도로 미세먼지 및 초미세먼지의 제거가 가능한 것일 수 있으며, 구체적으로 25 Pa 이하의 압력 강하(△P)에서 2.0 m/s 이상의 필터 속도, 보다 구체적으로 6 내지 20 Pa의 압력 강하(△P)에서 2.5 내지 9.0 m/s의 필터 속도로 미세먼지 및 초미세먼지의 제거할 수 있다.In one aspect of the present invention, the air purifier may be capable of removing fine dust and ultrafine dust at a filter speed of 1.0 m/s or more in a pressure drop (ΔP) of 50 Pa or less, and specifically 25 Pa or less. It is possible to remove fine dust and ultrafine dust at a filter speed of 2.0 m/s or more at a pressure drop (ΔP), more specifically 2.5 to 9.0 m/s at a pressure drop (△P) of 6 to 20 Pa. have.

구체적으로, 본 발명에 따른 공기청정기가 상기 복합 필터를 이동형 필터로 포함함에 따라, 필터에서 발생되는 압력강하가 낮으며, 보다 구체적으로 상기 범위의 낮은 압력 강하(△P)에서 상기 범위의 빠른 속도로 미세먼지의 제거가 가능하여, 단시간 내 공기질을 현저히 개선시킬 수 있는 장점이 있다.Specifically, as the air purifier according to the present invention includes the composite filter as a mobile filter, the pressure drop generated in the filter is low, and more specifically, a high speed in the range at a low pressure drop (ΔP) in the range. As it is possible to remove fine dust, there is an advantage of remarkably improving air quality within a short time.

이하 실시예 및 비교예를 바탕으로 본 발명을 더욱 상세히 설명한다. 다만 하기 실시예 및 비교예는 본 발명을 더욱 상세히 설명하기 위한 하나의 예시일 뿐, 본 발명이 하기 실시예 및 비교예에 의해 제한되는 것은 아니다. Hereinafter, the present invention will be described in more detail based on Examples and Comparative Examples. However, the following Examples and Comparative Examples are only one example for describing the present invention in more detail, and the present invention is not limited by the following Examples and Comparative Examples.

(평가)(evaluation)

1. 미세먼지 제거효율(removal efficiency, E)1.Removal efficiency (E)

niusiwen사의 HT-9600를 이용하여 하기 식 1에 따라 측정하였다.It was measured according to the following formula 1 using niusiwen's HT-9600.

[식 1][Equation 1]

미세먼지 제거효율(E) = [(필터 전 미세먼지 농도-필터 후 미세먼지 농도)/필터 전 미세먼지 농도] X 100 (%)Fine dust removal efficiency (E) = [(fine dust concentration before filter-fine dust concentration after filter)/fine dust concentration before filter] X 100 (%)

2. 정전기 전압(voltage, V)2. Electrostatic voltage (voltage, V)

CRenvis사의 HSK-5008L를 이용하여 측정하였다.It was measured using CRenvis's HSK-5008L.

3. 품질인자(Quality Factor, QF)3. Quality Factor (QF)

하기 식 2에 따라 측정하였다.It was measured according to the following formula 2.

[식 2][Equation 2]

QF = [ln(1-E)/△P] (Pa -1)QF = [ln(1-E)/△P] (Pa -1 )

(이 때, 상기 E는 미세먼지 제거효율이며, △P는 압력강하이다.)(At this time, E is the fine dust removal efficiency, and ΔP is the pressure drop.)

4. 속도에 따른 품질인자(modified-Quality Factor, m-QF)4. Modified-Quality Factor (m-QF) according to speed

[식 3][Equation 3]

m-QF = 품질인자 X 공기 주입 속도 (m/s·Pa)m-QF = quality factor X air injection speed (m/s·Pa)

[실시예 1 내지 4][Examples 1 to 4]

53.5 μM의 질산은 수용액 30 mL, 9.01 μM의 백금염화수소산 수용액 30 mL 및 8.98 μM의 질산팔라듐 수용액 30 mL을 1 분간 교반하여 금속 전구체 수용액을 제조하였다. 이 때, 상기 금속 전구체 수용액의 pH는 2.1 이었다. 이어서, 멜라민-포름알데히드 설페이트 발포체(Basf사 Basotect)를 0.5 X 0.5 X 0.5 cm 3 내지 1.3 X 1.3 X 1.3 cm 3 크기의 정육면체 형태로 절단한 것을 100 개 준비하였다. 절단된 발포체를 상기 금속 전구체 수용액에 투입하고 25℃에서 각각 10 시간(실시예 1), 24 시간(실시예 2), 48 시간(실시예 3) 및 72 시간(실시예 4) 교반하여 에칭된 표면에 금속 전구체가 코팅된 발포체를 얻었다.A metal precursor aqueous solution was prepared by stirring 53.5 μM silver nitrate aqueous solution 30 mL, 9.01 μM platinum hydrochloric acid aqueous solution 30 mL, and 8.98 μM palladium nitrate aqueous solution 30 mL for 1 minute. At this time, the pH of the aqueous metal precursor solution was 2.1. Then, 100 pieces of melamine-formaldehyde sulfate foam (Basf's Basotect) were cut into a cube having a size of 0.5 X 0.5 X 0.5 cm 3 to 1.3 X 1.3 X 1.3 cm 3 . The cut foam was added to the aqueous metal precursor solution and etched by stirring at 25° C. for 10 hours (Example 1), 24 hours (Example 2), 48 hours (Example 3) and 72 hours (Example 4), respectively. A foam coated with a metal precursor was obtained on the surface.

그 결과, 도 3에 도시된 바와 같이 에칭된 표면에 금속 전구체가 코팅된 실시예 1 내지 3의 발포체는 정육면체 형태이고, 실시예 4의 경우 구형인 것을 확인하였다.As a result, it was confirmed that the foams of Examples 1 to 3 coated with a metal precursor on the etched surface as shown in FIG. 3 were in the form of a cube, and were spherical in the case of Example 4.

이어서, 상기 발포체를 증류수로 세척한 후, 5 mM의 수소화붕소나트륨 수용액 50 mL을 이용하여 30 분간 금속 이온을 환원시킨 후, 증류수를 이용하여 세척하고 50℃에서 30 분간 건조시켜 에칭된 발포체 표면에 금속 입자가 코팅된 복합 필터를 제조하였다. 제조된 실시예 4의 복합필터를 도 4에 도시하였으며, 그 결과 지름 3 내지 9 mm의 다양한 크기를 갖는 복합필터가 제조된 것을 확인하였다.Subsequently, after washing the foam with distilled water, metal ions were reduced using 50 mL of 5 mM sodium borohydride aqueous solution for 30 minutes, washed with distilled water, dried at 50° C. for 30 minutes, and etched on the surface of the foam. A composite filter coated with metal particles was prepared. The prepared composite filter of Example 4 is shown in FIG. 4, and as a result, it was confirmed that composite filters having various sizes of 3 to 9 mm in diameter were manufactured.

또한, 제조된 실시예 4의 복합 필터를 주사전자현미경(Scanning Electron Microscope, SEM)을 이용하여 표면 거칠기를 관찰한 결과, 도 5에 도시된 바와 같이 표면이 거친 것을 확인하여 복합 필터의 표면으로 미세먼지 등 오염물질의 흡착이 보다 용이하게 일어날 수 있음을 확인하였다.In addition, as a result of observing the surface roughness of the prepared composite filter of Example 4 using a scanning electron microscope (SEM), it was confirmed that the surface was rough as shown in FIG. It was confirmed that the adsorption of contaminants such as dust can occur more easily.

또한, 제조된 실시예 4의 코팅된 금속 입자를 에너지 분산 스펙트럼(Energy Dispersive Spectrometer, EDS)을 이용하여 확인한 결과, 도 6에 도시된 바와 같이, 백금 45.53%, 은 31.49% 및 팔라듐 22.98%로 이루어진 것을 확인하였다.In addition, as a result of confirming the coated metal particles of Example 4 prepared using an Energy Dispersive Spectrometer (EDS), as shown in Fig. 6, consisting of 45.53% platinum, 31.49% silver, and 22.98% palladium. Confirmed.

또한, 도 7에 도시된 바와 같이, 미세먼지 유입부, 공기 유입부 및 정화된 공기가 배출되는 배출부를 포함하는 공기청정기에 제조된 실시예 4의 구형의 복합 필터를 이동형 필터로서 탑재하였다. 상기 공기청정기는 공기 유입부를 통해 유입되는 공기(Air flow in)에 의하여 복합 필터가 회전함에 따라 로또 머신 내 볼과 유사한 움직임을 나타내었으며, 상기 필터가 미세먼지 유입부를 통해 유입(PM in)시킨 미세먼지(PM10) 및 초미세먼지(PM2.5)를 흡착시켜 제거함으로써 정화된 공기를 배출부로 배출하였다.In addition, as shown in FIG. 7, the spherical composite filter of Example 4 manufactured in an air purifier including a fine dust inlet, an air inlet, and an outlet from which the purified air is discharged was mounted as a mobile filter. The air purifier exhibited a motion similar to that of a ball in the lottery machine as the composite filter rotates by air flowing in through the air inlet, and the filter introduced fine particles (PM in) through the fine dust inlet. The purified air was discharged to the discharge unit by adsorbing and removing dust (PM10) and ultrafine dust (PM2.5).

상기 배출부를 통해 배출된 미세먼지의 농도를 측정(PM detection)하여 미세먼지 제거효율을 계산한 결과 도 8에 도시된 바와 같이 현저히 높은 제거효율을 나타내며, 구체적으로 2.5 m/s의 공기 주입 속도에서 미세먼지(PM10) 제거효율 98.1% 및 초미세먼지(PM2.5) 제거효율 96.2%를 나타나는 것을 확인하였다.As a result of calculating the fine dust removal efficiency by measuring the concentration of the fine dust discharged through the discharge unit (PM detection), as shown in Fig. 8, the removal efficiency is remarkably high, and specifically at an air injection speed of 2.5 m/s It was confirmed that the fine dust (PM10) removal efficiency of 98.1% and the ultrafine dust (PM2.5) removal efficiency of 96.2%.

[실시예 5][Example 5]

상기 실시예 4에서 금속 전구체 수용액으로서 9.01 μM의 백금염화수소산 수용액 45 mL 및 8.98 μM의 질산팔라듐 수용액 45 mL을 사용한 것을 제외하고는 실시예 4와 동일하게 실시하여 복합 필터를 제조한 결과, 제조된 복합 필터는 정육면체 형태를 갖는 것을 확인하였다.A composite filter was prepared in the same manner as in Example 4, except that 45 mL of a 9.01 μM aqueous platinum hydrochloric acid solution and 45 mL of a 8.98 μM palladium nitrate aqueous solution were used as the metal precursor aqueous solution in Example 4. It was confirmed that the composite filter had a cube shape.

[실시예 6][Example 6]

상기 실시예 4에서 금속 전구체 수용액으로서 53.5 μM의 질산은 수용액 45 mL 및 8.98 μM의 질산팔라듐 수용액 45 mL을 사용한 것을 제외하고는 실시예 4와 동일하게 실시하여 복합 필터를 제조한 결과, 제조된 복합 필터는 정육면체 형태를 갖는 것을 확인하였다.A composite filter was prepared in the same manner as in Example 4, except that 45 mL of 53.5 μM silver nitrate aqueous solution and 45 mL of 8.98 μM palladium nitrate aqueous solution were used as the metal precursor aqueous solution in Example 4. Was confirmed to have a cube shape.

[실시예 7][Example 7]

상기 실시예 4에서 금속 전구체 수용액으로서 53.5 μM의 질산은 수용액 45 mL 및 9.01 μM의 백금염화수소산 수용액 45 mL을 사용한 것을 제외하고는 실시예 4와 동일하게 실시하여 복합 필터를 제조한 결과, 제조된 복합 필터는 정육면체 형태를 갖는 것을 확인하였다.A composite filter was prepared in the same manner as in Example 4, except that 45 mL of 53.5 μM silver nitrate aqueous solution and 45 mL of 9.01 μM platinum hydrochloric acid aqueous solution were used as the metal precursor aqueous solution in Example 4, It was confirmed that the filter had a cube shape.

[실시예 8][Example 8]

상기 실시예 4에서 금속 전구체 수용액으로 질산은 수용액만을 사용한 것을 제외하고는 실시예 4와 동일하게 실시하여 복합 필터를 제조한 결과, 제조된 복합 필터는 정육면체 형태를 갖는 것을 확인하였다.As a result of manufacturing a composite filter in the same manner as in Example 4, except that only an aqueous silver nitrate solution was used as the metal precursor aqueous solution in Example 4, it was confirmed that the manufactured composite filter had a cube shape.

[실시예 9][Example 9]

상기 실시예 4에서 금속 전구체 수용액으로 백금염화수소산 수용액만을 사용한 것을 제외하고는 실시예 4와 동일하게 실시하여 복합 필터를 제조한 결과, 제조된 복합 필터는 정육면체 형태를 갖는 것을 확인하였다.As a result of manufacturing a composite filter in the same manner as in Example 4, except that only an aqueous platinum hydrochloric acid solution was used as the aqueous metal precursor solution in Example 4, it was confirmed that the manufactured composite filter had a cube shape.

[실시예 10][Example 10]

상기 실시예 4에서 금속 전구체 수용액으로 질산팔라듐 수용액만을 사용한 것을 제외하고는 실시예 4와 동일하게 실시하여 복합 필터를 제조한 결과, 제조된 복합 필터는 정육면체 형태를 갖는 것을 확인하였다.As a result of manufacturing a composite filter in the same manner as in Example 4, except that only an aqueous palladium nitrate solution was used as the aqueous metal precursor solution in Example 4, it was confirmed that the manufactured composite filter had a cube shape.

[실시예 11][Example 11]

염화제2철 6수화물 0.9 g 및 아세트산나트륨 2.4 g을 에틸렌글리콜 30 mL에 용해시킨 후, 고압멸균기를 이용하여 200℃에서 8 시간 열처리하였다. 이어서, 에탄올과 증류수로 각각 3회씩 세척하여 친수성 자성 입자를 얻었다. 얻어진 친수성 자성입자 100 mg을 에탄올 50 mL에 분산시킨 후, 상기 실시예 4에서 제조된 복합 필터 100 개를 투입하여 30 분간 초음파 처리하여 친수성 및 자성을 부여하였다. 이어서, 상기 복합 필터를 에탄올로 세척한 후, 50℃에서 30 분간 건조시켜 구형의 복합 필터를 제조하였다.0.9 g of ferric chloride hexahydrate and 2.4 g of sodium acetate were dissolved in 30 mL of ethylene glycol, followed by heat treatment at 200° C. for 8 hours using an autoclave. Subsequently, each was washed three times with ethanol and distilled water to obtain hydrophilic magnetic particles. After dispersing 100 mg of the obtained hydrophilic magnetic particles in 50 mL of ethanol, 100 composite filters prepared in Example 4 were added and subjected to ultrasonic treatment for 30 minutes to impart hydrophilicity and magnetism. Subsequently, the composite filter was washed with ethanol and then dried at 50° C. for 30 minutes to prepare a spherical composite filter.

제조된 복합 필터를 주사전자현미경(Scanning Electron Microscope, SEM)을 이용하여 표면 거칠기를 관찰한 결과, 도 5에 도시된 바와 같이 표면이 매우 거친 것을 확인하여 복합 필터의 표면으로 미세먼지 등 오염물질의 흡착이 더욱 용이하게 일어날 수 있음을 확인하였다.As a result of observing the surface roughness of the manufactured composite filter using a scanning electron microscope (SEM), it was confirmed that the surface was very rough as shown in FIG. It was confirmed that adsorption could occur more easily.

또한, 코팅된 금속 입자를 에너지 분산 스펙트럼(Energy Dispersive Spectrometer, EDS)을 이용하여 확인한 결과, 도 6에 도시된 바와 같이, 철 52.87%, 은 35.56%, 팔라듐 6.49% 및 백금 5.08%로 이루어진 것을 확인하였다.In addition, as a result of confirming the coated metal particles using an Energy Dispersive Spectrometer (EDS), as shown in FIG. 6, it was confirmed that it was composed of 52.87% iron, 35.56% silver, 6.49% palladium, and 5.08% platinum. I did.

또한, 제조된 복합 필터를 도 7의 공기청정기에 이동형 필터로서 탑재하여 미세먼지 제거효율을 확인하였다. 이 때 복합 필터는 유입된 공기에 의해 로또머신 내 볼과 같이 회전하였으며, 제거효율 계산 결과, 도 8에 도시된 바와 같이 2.5 m/s의 공기 주입 속도에서 미세먼지(PM10) 제거효율이 99.7%이며 초미세먼지(PM2.5)의 제거효율이 98.8%인 것을 확인하였고, 9.5 m/s의 높은 속도에서도 미세먼지(PM10) 제거효율이 85.3%로 높게 나타나는 것을 확인하였다.In addition, the prepared composite filter was mounted as a mobile filter in the air purifier of FIG. 7 to confirm the efficiency of removing fine dust. At this time, the composite filter rotated like a ball in the lottery machine by the introduced air, and as a result of calculating the removal efficiency, the removal efficiency of fine dust (PM10) was 99.7% at the air injection speed of 2.5 m/s It was confirmed that the removal efficiency of ultrafine dust (PM2.5) was 98.8%, and it was confirmed that the removal efficiency of fine dust (PM10) was high as 85.3% even at a high speed of 9.5 m/s.

구체적으로, 0.9, 2.0, 2.5, 4.5 및 9.5 m/s의 속도에서 각각 미세먼지 제거효율을 측정한 결과, 모든 속도에서 미세먼지(PM10) 및 초미세먼지(PM2.5)의 제거효율이 높게 유지되는 것을 확인하였으며, 이때 압력강하(△P) 값이 모두 20 Pa 이하로 현저히 낮은 것을 확인하였다.Specifically, as a result of measuring the fine dust removal efficiency at speeds of 0.9, 2.0, 2.5, 4.5 and 9.5 m/s, respectively, the removal efficiency of fine dust (PM10) and ultrafine dust (PM2.5) was high at all speeds. It was confirmed that it was maintained, and at this time, it was confirmed that all of the pressure drop (ΔP) values were significantly lower to 20 Pa or less.

또한, 2.5 m/s 및 9.5 m/s의 주입속도에서 각각 QF 및 m-QF 값을 계산한 결과, 상기 2.5 m/s의 속도에서 미세먼지(PM10)의 QF 값이 0.9202 Pa -1이고, m-QF 값이 2.301 m/s·Pa이었고, 초미세먼지(PM2.5)의 QF 값이 0.737 Pa -1이고, m-QF 값이 1.843 m/s·Pa이었으며, 9.5 m/s의 속도에서 미세먼지(PM10)의 QF 값이 0.099 Pa -1이고, m-QF 값이 0.941 m/s·Pa인 것을 확인하였다.In addition, as a result of calculating the QF and m-QF values at the injection rates of 2.5 m/s and 9.5 m/s, respectively, the QF value of the fine dust (PM10) at the speed of 2.5 m/s is 0.9202 Pa -1 , The m-QF value was 2.301 m/s·Pa, the QF value of ultrafine dust (PM2.5) was 0.737 Pa -1 , the m-QF value was 1.843 m/s·Pa, and the speed of 9.5 m/s It was confirmed that the QF value of fine dust (PM10) was 0.099 Pa -1 and the m-QF value was 0.941 m/s·Pa.

이를 통해, 본 발명에 따른 복합필터가 고효율의 필터 성능을 나타낼 뿐만 아니라, 주입된 속도에 대비하여도 현저히 우수한 필터 성능을 갖는 것을 확인하였다.Through this, it was confirmed that the composite filter according to the present invention not only exhibits high-efficiency filter performance, but also has remarkably excellent filter performance compared to the injected speed.

또한, 도 9에 도시된 바와 같이, 제조된 실시예 11의 필터 중 지름 3, 5, 7 및 9 mm의 필터를 크기별로 분류하여 미세먼지 제거효율을 측정한 결과, 다양한 크기에서 모두 높은 제거효율을 가지며, 구체적으로 지름 3 내지 7 mm 필터 사용 시 미세먼지(PM10) 및 초미세먼지(PM2.5)의 제거효율이 모두 95% 이상 나타나는 것을 확인하였다.In addition, as shown in FIG. 9, among the filters of Example 11 manufactured, filters having diameters 3, 5, 7 and 9 mm were classified by size to measure the fine dust removal efficiency. It was confirmed that the removal efficiency of both fine dust (PM10) and ultrafine dust (PM2.5) appeared more than 95% when using a filter having a diameter of 3 to 7 mm.

또한, 공기 유입부를 통해 유입되는 공기 속도를 조절하여 정전기 전압을 측정한 결과, 도 10에 도시된 바와 같이, 1 내지 10 m/s의 속도에서 전압이 400 V 이상으로 높게 유지되는 것을 확인하였다. 이를 통해, 정전기로 인한 미세먼지 흡착 성능이 매우 우수한 것을 알 수 있었다.In addition, as a result of measuring the electrostatic voltage by adjusting the air velocity introduced through the air inlet, it was confirmed that the voltage was maintained as high as 400 V or more at a speed of 1 to 10 m/s, as shown in FIG. 10. Through this, it was found that the adsorption performance of fine dust due to static electricity was very excellent.

또한, 2.5 m/s의 속도로 공기를 주입하여 1 cycle 당 평균 4,000 mg/m 3의 미세먼지 및 평균 1,000 mg/m 3 초미세먼지를 제거하는 것을 300 회까지 반복하였을 경우, 도 11에 도시된 바와 같이 필터의 반복사용에 따른 미세먼지 및 초미세먼지 제거효율의 저하 없이 우수한 제거성능을 유지하는 것을 확인하였다.In addition, when air is injected at a speed of 2.5 m/s to remove an average of 4,000 mg/m 3 of fine dust and an average of 1,000 mg/m 3 of ultrafine dust per cycle, it is shown in FIG. As described above, it was confirmed that the excellent removal performance was maintained without deteriorating the efficiency of removing fine dust and ultrafine dust due to repeated use of the filter.

또한, 2.5 m/s의 속도로 10,000 mg/m 3의 미세먼지(PM10) 및 3,000 mg/m 3의 초미세먼지(PM2.5)를 주입시킨 후 필터시킨 경우, 15 분 만에 공기청정기 내부에 미세먼지(PM10)가 24 mg/m 3 및 초미세먼지(PM2.5)가 12 mg/m 3 잔존하는 것을 확인하였다. 상기 잔존량은 세계보건기구(World Health Organization, WHO)의 가이드라인(Air Qualiy Guideline)인 PM10 30 mg/m 3 미만 및 PM2.5 15 mg/m 3 미만에 따른 “좋음” 수준으로서, 단 시간 내에 공기질이 좋음 수준으로 개선되는 것을 확인하였다.In addition, in the case of filtering after injecting 10,000 mg/m 3 of fine dust (PM10) and 3,000 mg/m 3 of ultrafine dust (PM2.5) at a speed of 2.5 m/s, the inside of the air purifier is 15 minutes. It was confirmed that 24 mg/m 3 of fine dust (PM10) and 12 mg/m 3 of ultrafine dust (PM2.5) remained. The residual amount is a “good” level according to the Air Qualiy Guideline of the World Health Organization (WHO), which is less than 30 mg/m 3 of PM10 and 15 mg/m 3 of PM2.5, for a short time. It was confirmed that the air quality in the interior was improved to a good level.

한편, 도 12와 같이 미세먼지를 포함하는 공기가 유입되는 공기 유입부 및 정화된 공기가 배출되는 배출부를 포함하는 공기청정기에 제조된 실시예 11의 복합 필터를 고정형 필터로 적용하여 미세먼지(PM10) 제거효율을 측정한 결과, 95% 이상의 제거효율을 나타내는 것을 확인하였으며, 2.5 m/s의 속도로 10,000 mg/m 3의 미세먼지(PM10) 및 3,000 mg/m 3의 초미세먼지(PM2.5)를 주입시킨 후 필터시킨 경우, 23분 만에 “좋음” 수준으로 공기질을 개선하는 것을 확인하였다.Meanwhile, as shown in FIG. 12, the composite filter of Example 11 manufactured in an air purifier including an air inlet through which air containing fine dust is introduced and an outlet through which the purified air is discharged is applied as a fixed filter to obtain fine dust (PM10). ) As a result of measuring the removal efficiency, it was confirmed that the removal efficiency was more than 95%, and at a speed of 2.5 m/s, 10,000 mg/m 3 of fine dust (PM10) and 3,000 mg/m 3 of ultrafine dust (PM2. In the case of filtering after injecting 5), it was confirmed that the air quality was improved to a level of “good” in 23 minutes.

[비교예 1][Comparative Example 1]

멜라민-포름알데히드 설페이트 발포체를 지름 5 mm의 구형으로 절단하여 주사전자현미경(Scanning Electron Microscope, SEM)을 이용하여 표면 거칠기를 관찰한 결과, 도 5에 도시된 바와 같이 거친 표면을 갖지 않는 것을 확인하였다.As a result of observing the surface roughness using a scanning electron microscope (SEM) by cutting the melamine-formaldehyde sulfate foam into a sphere having a diameter of 5 mm, it was confirmed that it did not have a rough surface as shown in FIG. .

또한, 도 7의 공기청정기에 제조된 복합 필터를 이동형 필터로서 탑재하여 미세먼지 제거효율을 계산한 결과, 도 8에 도시된 바와 같이, 미세먼지 및 초미세먼지 제거효율이 매우 낮은 것을 확인하였다.In addition, as a result of calculating the fine dust removal efficiency by mounting the composite filter manufactured in the air purifier of FIG. 7 as a mobile filter, it was confirmed that the fine dust and ultrafine dust removal efficiency was very low, as shown in FIG. 8.

또한, 100 회 이상 반복 사용 시 미세먼지 제거효율이 현저하게 감소하여, 필터 사용에 따라 미세먼지 제거효율이 낮아지는 것을 알 수 있었다.In addition, when repeatedly used more than 100 times, the fine dust removal efficiency was remarkably reduced, and it was found that the fine dust removal efficiency decreased according to the use of the filter.

Claims (15)

a) 필터기재를 금속 전구체 수용액에 투입하여 에칭하는 것과 동시에 상기 금속 전구체를 코팅하는 단계; 및a) coating the metal precursor while etching the filter substrate by putting it in an aqueous metal precursor solution; And b) 상기 필터기재에 코팅된 금속 전구체를 금속 입자로 환원시키는 단계;b) reducing the metal precursor coated on the filter substrate to metal particles; 를 포함하는 복합 필터의 제조방법.Method of manufacturing a composite filter comprising a. 제1항에 있어서,The method of claim 1, 상기 필터기재는 멜라민 수지 발포체인 복합 필터의 제조방법.The filter base is a method of manufacturing a composite filter of melamine resin foam. 제1항에 있어서,The method of claim 1, 상기 금속 전구체는 귀금속류에서 선택되는 어느 하나 또는 둘 이상의 금속의 수산화물, 할로겐화물 또는 질산화물인 것인 복합 필터의 제조방법.The metal precursor is a method of manufacturing a composite filter that is a hydroxide, halide or nitrate oxide of any one or two or more metals selected from precious metals. 제1항에 있어서,The method of claim 1, 상기 금속 전구체는 은, 백금 및 팔라듐 전구체의 혼합 전구체인 복합 필터의 제조방법.The metal precursor is a method of manufacturing a composite filter that is a mixed precursor of silver, platinum, and palladium precursor. 제1항에 있어서,The method of claim 1, 상기 금속 전구체 수용액 내 금속 전구체 고형분의 함량은 1 내지 300 μM인 복합 필터의 제조방법.The method of manufacturing a composite filter in which the metal precursor solid content in the aqueous metal precursor solution is 1 to 300 μM. 제1항에 있어서,The method of claim 1, 상기 a) 단계의 에칭은 상기 필터기재를 구형으로 에칭시키는 것을 특징으로 하는 복합 필터의 제조방법.The etching of step a) is a method of manufacturing a composite filter, characterized in that the filter substrate is etched into a spherical shape. 제1항에 있어서,The method of claim 1, 상기 b) 단계 이후에 금속 입자가 코팅된 필터기재에 친수성 처리 및 자성 처리하는 단계를 더 포함하는 복합 필터의 제조방법.After the step b), the method of manufacturing a composite filter further comprising hydrophilic treatment and magnetic treatment on the filter substrate coated with metal particles. 에칭된 표면에 은, 백금 및 팔라듐에서 선택되는 어느 하나 또는 둘 이상의 혼합금속 입자가 코팅된 복합 필터.A composite filter in which one or two or more mixed metal particles selected from silver, platinum and palladium are coated on the etched surface. 제8항에 있어서,The method of claim 8, 상기 복합 필터는 친수성 및 자성 처리된 것인 복합 필터.The composite filter is a composite filter that is hydrophilic and magnetically treated. 제8항에 있어서,The method of claim 8, 상기 복합 필터는 미세먼지(PM10) 및 초미세먼지(PM2.5)의 제거효율이 85% 이상인 복합 필터.The composite filter is a composite filter having a removal efficiency of 85% or more of fine dust (PM10) and ultrafine dust (PM2.5). 제8항에 있어서,The method of claim 8, 상기 복합 필터는 1 내지 500 mm의 지름을 갖는 구형인 것을 특징으로 하는 복합 필터.The composite filter is a composite filter, characterized in that the spherical shape having a diameter of 1 to 500 mm. 공기정화용 필터를 포함하는 공기청정기에 있어서,In an air purifier comprising a filter for air purification, 상기 공기정화용 필터가 제8항에 따른 복합 필터인 공기청정기.An air purifier wherein the air purifying filter is a composite filter according to claim 8. 제12항에 있어서,The method of claim 12, 상기 공기청정기는 공기 유입부, 상기 복합 필터를 탑재한 챔버 및 공기 배출부를 포함하며, 상기 복합 필터는 유입되는 공기의 흐름에 의해 유동성을 가지는 이동형 필터인 공기청정기.The air purifier includes an air inlet, a chamber in which the composite filter is mounted, and an air outlet, and the composite filter is a mobile filter having fluidity by a flow of incoming air. 제12항에 있어서,The method of claim 12, 상기 공기청정기는 유입되는 공기에 의해 상기 복합 필터가 회전하는 것을 특징으로 하는 로또 머신형인 공기청정기.The air cleaner is a lotto machine type air cleaner, characterized in that the composite filter is rotated by incoming air. 제12항에 있어서,The method of claim 12, 상기 공기청정기는 50 Pa 이하의 압력 강하(△P)에서 1.0 m/s 이상의 필터 속도로 미세먼지(PM10) 및 초미세먼지(PM2.5)의 제거가 가능한 공기청정기.The air purifier is an air purifier capable of removing fine dust (PM10) and ultrafine dust (PM2.5) at a filter speed of 1.0 m/s or more in a pressure drop (ΔP) of 50 Pa or less.
PCT/KR2019/003982 2019-03-22 2019-04-04 Air purifier having movable fine dust filter mounted thereon Ceased WO2020196973A1 (en)

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