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WO2008107734A1 - Matériau de revêtement ou laque à transmission de chaleur améliorée, et surface transmettant la chaleur pourvue d'un revêtement fabriqué en utilisant le matériau de revêtement - Google Patents

Matériau de revêtement ou laque à transmission de chaleur améliorée, et surface transmettant la chaleur pourvue d'un revêtement fabriqué en utilisant le matériau de revêtement Download PDF

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Publication number
WO2008107734A1
WO2008107734A1 PCT/IB2007/003898 IB2007003898W WO2008107734A1 WO 2008107734 A1 WO2008107734 A1 WO 2008107734A1 IB 2007003898 W IB2007003898 W IB 2007003898W WO 2008107734 A1 WO2008107734 A1 WO 2008107734A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating material
coating
heat
nanofibers
nanofiber
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/IB2007/003898
Other languages
German (de)
English (en)
Inventor
Ernst Hammel
Xinhe Tang
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.)
Electrovac AG
Original Assignee
Electrovac AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Electrovac AG filed Critical Electrovac AG
Priority to EP07859032A priority Critical patent/EP2129727A1/fr
Publication of WO2008107734A1 publication Critical patent/WO2008107734A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
    • F28F19/04—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of rubber; of plastics material; of varnish
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon

Definitions

  • the invention relates to a coating material or to a paint with improved heat transfer or with improved
  • heat transfer occurs by thermal radiation and / or convection between surfaces of solid bodies and one adjacent to the respective surface, i. this adjacent gas and / or vaporous and / or liquid medium for use, in particular the heat radiation from a heated surface to the adjacent gaseous and / or vaporous and / or liquid medium.
  • Radiator or heat sink for cooling electrical or electronic components, components or assemblies, etc., and in particular also passive heat sinks, with their heat-emitting outer surface in the vapor and / or gaseous medium, i.
  • active cooler, heat sinks or heat exchangers which are traversed by a heat-transporting medium and their inner surfaces then form the heat transferring or donating surfaces.
  • the object of the invention is to show a coating material which the heat transfer between the heat transfer surface of a solid body and an adjacent to this surface steam and / or gaseous and / or liquid medium improved.
  • a coating material according to claim 1 is formed.
  • the invention further provides a surface coated with the coating material and adjacent to a gas and / or vaporous and / or liquid medium according to claim 13.
  • the coating material or lacquer according to the invention With the coating material or lacquer according to the invention, a substantial improvement of the heat transfer by radiation, but also by convection between the relevant, serving for the heat transfer surface of a solid body and the adjacent gas and / or vaporous and / or liquid medium is possible. Furthermore, with a coating produced using the coating material or paint, a protection of the surface concerned is achieved, for example, a corrosion protection and / or a surface protection against an aggressive medium, etc.
  • the coating material of the invention there is a wide range of applications.
  • the coating material according to the invention is suitable for coating surfaces of coolers, heat sinks or heat exchangers, specifically for coating, in particular, those surfaces where heat transfer to or from an adjacent gas and / or vaporous and / or liquid medium should be made.
  • the coating material of the invention consists in the simplest case of a lacquer base or matrix with a corresponding proportion of nanofibers or nanofiber material.
  • a paint base are, for example, basically curing plastics or resins that are not yet cured in liquid or viscous form, including those plastics or resins that Usually used for paints or varnishes, but also two-component plastics, etc.
  • Suitable nanofibers are, for example, those fibers which are sold under the name ENF-100-HT, HTP-150F-LHT, HTP-110FF-LHT and HTP-11 OF-HHT by Electrovac GmbH, A-3400 Borneuburg, Austria.
  • Nano fiber type AGF as grown
  • nanofiber or nanofiber material in principle, the nanofibers listed in Table 1 below are suitable.
  • Coating materials according to the invention 2 and 3 in diagrammatic representation using the test or
  • FIG. 5 is a view similar to FIG. 1 of an altered test and measurement arrangement
  • FIG. Fig. 6 is a diagrammatic representation of the temperature as measured by different samples using the test and measurement device of Fig. 5 as a function of time
  • Fig. 7 in a simplified representation of another test or measuring arrangement for
  • FIG. 8 is a diagrammatic representation of the temperature versus time measured using the test and measurement device of FIG. 7 at different samples;
  • FIG. 9 in an enlarged partial view and in section a coated on its outer surface with the coating material cooler;
  • Fig. 10 in diagram form further using the test and
  • Measuring device of Fig. 5 measured at different samples temperature as a function of time.
  • the test and measurement arrangement generally designated 1 in FIG. 1 serves to determine the heat-radiation behavior of surfaces coated with different paints or coating materials according to the invention.
  • the measurement and test arrangement consists essentially of a thermal insulator 2, from a arranged on the top of this insulator flat heater 3, a mounted on the top of the heater 4 copper plate 4 and a Thermocouple 5 for measuring the temperature of the top of the copper plate 4.
  • the copper plate 4 is thermally well conductive full surface or almost full surface connected to the heater 3, for example by soldering. By appropriate design of the heater 3 as well as by the use of the copper plate 4 with sufficient thickness as even heat distribution at the top of this plate is achieved.
  • the copper plate 4 in the illustrated embodiment has a square blank with an area of 40 cm 2 on each surface side.
  • the temperature profile at the top of the copper plate 4 was measured as a function of time in comparative measurements with the thermocouple 5, namely un coated and coated (coating 6) copper plate 4.
  • the coating 6 was carried out with different samples of coating material.
  • the coating material used was in each case a lacquer which contained a proportion of nanofibers or nanofiber material in a lacquer base or matrix.
  • the nanofiber material and / or its proportion varied from sample to sample.
  • the experiments were carried out with the nanofibers ENT, HHT and ENF100GFE.
  • a polymeric material i. used an epoxy resin.
  • the coating 6 of the upper side of the copper plate 4 with the samples was in each case in an amount of 50 mg, which was applied evenly distributed on the top of the copper plate 4, ie with a specific surface coating of 800 cm 2 per gram of paint or coating material.
  • the heater 4 was operated at a constant electrical power of 8.94 watts, at a voltage of 14.9 volts with a current of 0.6 amperes.
  • the tests with the test and measurement arrangement were carried out in ambient atmosphere at ambient temperature of about 20 ° C.
  • the measured at the top of the copper plate 4 and the coating 6 temperature T is a measure of the heat output that is released into the environment, in part by heat radiation, but partly by convection to which at the top of the coating 6 adjusting air flow.
  • the heat output in the environment is greater, the lower the temperature increase is as a function of the measuring time.
  • the temperature measured with the thermocouple 5 at the upper side of the respective coating 6 as a function of time is reproduced for various samples or tests 2.1-2.3.
  • the curve 2.4 shows as a control measurement the temperature profile of the upper side of the copper plate 4 without the coating 6.
  • the results measured after a measuring time of 36 minutes are summarized again in Table 2 below.
  • the proportion of nanofiber material relative to the total weight of the coating 6 was 17% by weight in each case.
  • FIG. 3 again shows, for various samples 3.1-3.4 of the coating material, the one with the thermocouple 5 at the top side of FIG Coating 6 measured temperature profile as a function of the measuring time. With the curve 3.5 turn the temperature profile of the uncoated copper plate 4 is given again.
  • FIG. 3 also shows the temperature profile for a test 3.4, in which the copper plate 4 was coated only with the lacquer matrix without nanofiber material.
  • thermocouple 5 temperature T was 94.2 0 C after a test time of 36 minutes.
  • the results determined with the test and measuring device can be summarized to the effect that the coating 6 of the top of the copper plate 4 with the nanofiber material containing coating material is a significant improvement in the heat transfer to the environment is achieved, and that optimum conditions are achieved when the Share of nanofiber material approximately in the range between 4 and 20 wt.% Based on the total mass of the coating material.
  • the improvement of the heat output by the proportion of nanofibers or nanofiber material in the paint or coating material results according to one of the invention underlying knowledge not only on the high thermal conductivity of the nanofibers or the nanofiber material, but primarily from the fact that the coating 6 of the top Copper plate 4 with the nanofibers or nanofiber material-containing paint leads to a finely structured surface and thus to an increase in the heat emitting or radiating surface at which the nanofibers for the most part from the actual paint layer, ie protrude from the layer formed by the paint base. This is especially true if the coating has only a very small thickness, for example, a thickness of only a few microns and the proportion of nanofibers in the optimum range between 4 and 20 wt.% Based on the total mass.
  • FIG. 4 shows in a diagrammatic representation the radiated heat energy in watts as a function of the radiating area in cm 2 for a black body at different body temperatures, in accordance with the following list:
  • Curve 4.1 body temperature 20 ° C curve 4.4 - body temperature 80 0 C curve 4.2 - body temperature 40 0 C curve 4.5 - body temperature 100 0 C curve 4.3 - body temperature 60 ° C curve 4.6 - body temperature 120 0 C.
  • FIG. 5 shows a testing and measuring device 1a, which differs from the testing and measuring device 1 in that a fan or fan 7 is arranged opposite the copper plate 4 or the coating 6 provided on this plate.
  • the copper plate 4 which is connected to the underside with the heating device 3 over the entire surface or essentially over the entire surface, in turn has a surface area of 40 cm 2 in the case of a square blank on the upper and lower sides.
  • the measurements given below were again carried out with the test and measuring device 1a in a normal atmosphere and at an ambient temperature of about 20 ° C.
  • a material was used which contained nano-fibers of the HHT type in the paint matrix in a proportion of 17% by weight, based on the total weight of the coating material.
  • the amount of coating material applied to the top was 50 mg, which at the area of 40 cm 2 corresponded to a layer thickness of about 10 m ⁇ .
  • the performance and the distance of the fan 7 was kept constant in all experiments.
  • the study examined the improvement of the heat dissipation or cooling of the copper plate 4 by the coating 6 with different heating power of the heating device 3, specifically at 8.94 W, 18 W and 33.6 W.
  • FIG. 6 and in Table 6 below the essential parameters and results of this test are summarized, the temperature of the uncoated and the coated copper plate 4 being determined in each case at the same power with the aid of the thermocouple 5.
  • ⁇ T is the temperature difference between the temperature of the uncoated and coated copper plate 4 at the end of the measurement interval of 36 minutes.
  • test and measuring devices 1 and 1 b correspond with respect to the heat dissipation to the environment u.a. the conditions that exist, for example, in a passive cooler for cooling electrical components, components, modules or assemblies without or with additional fan.
  • FIG. 7 shows a testing and measuring device 1 b in which the arrangement consisting of the insulator 2, the heating device 3, the copper plate 4 and the thermocouple 5 is turned over above a copper plate 8 of a cooling element cooled with water 9 is arranged.
  • the copper plates 4 and 8 are held parallel to each other and at a distance from each other and that at a distance of 2.1 mm.
  • the plate 8 is in shape and surface identical to the copper plate 4.
  • a thermocouple 11 is provided for measuring the temperature of the plate 8.
  • the proportion of the nanofiber material in the paint matrix was again 17% by weight, based on the total weight of the coating material.
  • the coating material according to the invention is suitable as a surface coating, in particular wherever optimum heat transfer from a surface of a solid body to a liquid and / or gas and / or vapor medium, for example air, adjacent to this surface is required.
  • the coating material according to the invention is suitable for coating the heat-transferring surfaces of passive coolers, coolers or heat sinks through which a gaseous and / or vaporous and / or liquid cooling medium flows, heat exchangers, etc.
  • the heat-transferring surfaces are, for example, internal and / or outer surfaces of these coolers, heat sinks, heat exchangers, etc .. FIG.
  • FIG. 9 shows, in a very simplified partial illustration, a cooler 12 consisting of the heat sink 13 made of a material with a high thermal conductivity, eg of a metallic material, which is provided on its surface with a coating 14 of lacquer containing nanofibres or nanofiber material.
  • the cooler 12 is used in a known manner for cooling an electrical component or module, not shown, for example, a loss of heat generating electrical component or module.
  • FIG. 10 again shows, in a diagram as in FIG. 6, the course of the temperature at different samples as a function of time measured on different samples using the test and measuring device of FIG.
  • Table 8 The essential parameters of these measurements are in turn summarized in Table 8 below:
  • Curve 10.2 of FIG. 10 thus shows the temperature profile during a coating with a coating material which contains 17% by weight of a mixture of nanofibers of the HHT type and graphite flakes, the proportion of these constituents in the mixture being 1: 1 relative to their weight. It can be seen from the comparison of the curves 10.2 and 10.3, that the cooling effect generated by heat radiation and convection is then significantly improved if the proportion of graphite flakes is replaced by nanofibers. This confirms, inter alia, that the cooling effect or heat transfer is substantially improved by the increase in surface area produced by the nanofibers, ie, by the regions of the nanofibers projecting from the surface of the coating. This is also confirmed by the curve 10.4.
  • the thinner the nanofibers used the better the effect sought with the invention.
  • the greater the length / thickness ratio of the nanofibers is therefore preferably greater than 500.
  • the lacquer matrix may also contain at least one further additive, for example a black or blackening additive, for example carbon black or carbon black.
  • a black or blackening additive for example carbon black or carbon black.
  • the proportion of this additive in the total mass of the paint is, for example, 5 to 20% by weight.
  • graphite or graphite flakes as fillers, for example exfoliated and / or not exfoliated.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)

Abstract

L'invention concerne une laque novatrice pour le revêtement de surface de corps sur des surfaces qui sont voisines, en vue d'une transmission de chaleur, d'un fluide gazeux et/ou sous forme de vapeur et/ou liquide.
PCT/IB2007/003898 2007-03-06 2007-12-06 Matériau de revêtement ou laque à transmission de chaleur améliorée, et surface transmettant la chaleur pourvue d'un revêtement fabriqué en utilisant le matériau de revêtement Ceased WO2008107734A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07859032A EP2129727A1 (fr) 2007-03-06 2007-12-06 Matériau de revêtement ou laque à transmission de chaleur améliorée, et surface transmettant la chaleur pourvue d'un revêtement fabriqué en utilisant le matériau de revêtement

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102007011298.1 2007-03-06
DE102007011298 2007-03-06
DE102007026253.3 2007-06-04
DE102007026253A DE102007026253A1 (de) 2007-03-06 2007-06-04 Beschichtungsmaterial bzw. Lack mit verbesserter Wärmeübertragung sowie Wärme übertragende Oberfläche mit einer unter Verwendung des Beschichtungsmaterials hergestellten Beschichtung

Publications (1)

Publication Number Publication Date
WO2008107734A1 true WO2008107734A1 (fr) 2008-09-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/003898 Ceased WO2008107734A1 (fr) 2007-03-06 2007-12-06 Matériau de revêtement ou laque à transmission de chaleur améliorée, et surface transmettant la chaleur pourvue d'un revêtement fabriqué en utilisant le matériau de revêtement

Country Status (3)

Country Link
EP (1) EP2129727A1 (fr)
DE (1) DE102007026253A1 (fr)
WO (1) WO2008107734A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025080515A1 (fr) * 2023-10-10 2025-04-17 Gtf, Llc Appareil de broyage à température régulée

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014200400A1 (de) * 2014-01-13 2015-07-16 Siemens Aktiengesellschaft Vorrichtung zur Übertragung von Wärme zwischen wenigstens zwei bei unterschiedlichen Temperaturen vorliegenden Stoffströmen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003013199A2 (fr) 2001-07-27 2003-02-13 Eikos, Inc. Revetements conformes contenant des nanotubes de carbone
EP1361257A1 (fr) 2002-04-30 2003-11-12 Rohm And Haas Company Poudres pour revêtement, leur procédé de fabrication et objets revêtus de celles-ci
WO2005075548A2 (fr) 2004-02-06 2005-08-18 Tigerwerk Lack- Und Farbenfabrik Gmbh & Co.Kg Procede de production de resines polyester a additifs nanoscalaires pour peinture pulverulente
EP1580514A1 (fr) 2002-11-26 2005-09-28 Daikin Industries, Ltd. Echangeur de chaleur destine a un dispositif a air et de congelation
EP1659158A2 (fr) 2004-11-22 2006-05-24 Nissin Kogyo Co., Ltd Méthode de fabrication d'une couche mince, substrat ayant une couche mince, matériau d'émission d'électron, méthode pour fabriquer un materiau d'émission d'électron et dispositif d'émission d'électron

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003013199A2 (fr) 2001-07-27 2003-02-13 Eikos, Inc. Revetements conformes contenant des nanotubes de carbone
EP1361257A1 (fr) 2002-04-30 2003-11-12 Rohm And Haas Company Poudres pour revêtement, leur procédé de fabrication et objets revêtus de celles-ci
EP1580514A1 (fr) 2002-11-26 2005-09-28 Daikin Industries, Ltd. Echangeur de chaleur destine a un dispositif a air et de congelation
WO2005075548A2 (fr) 2004-02-06 2005-08-18 Tigerwerk Lack- Und Farbenfabrik Gmbh & Co.Kg Procede de production de resines polyester a additifs nanoscalaires pour peinture pulverulente
EP1659158A2 (fr) 2004-11-22 2006-05-24 Nissin Kogyo Co., Ltd Méthode de fabrication d'une couche mince, substrat ayant une couche mince, matériau d'émission d'électron, méthode pour fabriquer un materiau d'émission d'électron et dispositif d'émission d'électron

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
E. HAMMEL, X. TANG, M. TRAMPERT ET AL: "Performance of Carbon Nanofiber Based Thermal Grease", IMAPS ADVANCED TECHNOLOGY WORKSHOP 2005, PALO ALTO, 24 October 2005 (2005-10-24), XP002480990, Retrieved from the Internet <URL:http://www.electrovac.com/n221666/n.html> [retrieved on 20080519] *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025080515A1 (fr) * 2023-10-10 2025-04-17 Gtf, Llc Appareil de broyage à température régulée

Also Published As

Publication number Publication date
EP2129727A1 (fr) 2009-12-09
DE102007026253A1 (de) 2008-09-11

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