WO2024181657A1 - Swelling support of homogeneous ion-exchange membrane, and ion-exchange membrane device comprising same - Google Patents

Abstract

The present invention relates to a swelling support of a homogeneous ion-exchange membrane, and an ion-exchange membrane device comprising same, and, more specifically, comprises: a plate-shaped ion-exchange membrane support; a double-sided tape of which one surface is attached to the ion-exchange membrane support; a rear tape attached to the other surface of the double-sided tape; a homogeneous ion-exchange membrane positioned on and attached to the rear tape; and a front tape positioned on and attached to the homogeneous ion-exchange membrane.

Description

Swelling support for homogeneous ion exchange membrane and ion exchange membrane device comprising the same

The present invention relates to a swelling support for a homogeneous ion exchange membrane and an ion exchange membrane device including the same, and more specifically, to a swelling support for a homogeneous ion exchange membrane capable of compensating for weak mechanical rigidity and non-uniform swelling characteristics by developing a swelling support structure for a homogeneous ion exchange membrane to confirm the electrochemical characteristics and fluid characteristics of a homogeneous ion exchange membrane in a microfluidic device, and to an ion exchange membrane device including the same.

An ion exchange membrane (IEM) is a membrane that selectively allows ions to pass through it under an electric field. Depending on the polarity of the permeating ion, it can be divided into a cation exchange membrane (CEM) and an anion exchange membrane (AEM). The ion exchange membrane's selective ability to allow ions to pass through it has been utilized in traditional separation processes such as dialysis and electrodialysis, and has recently attracted attention in the battery and renewable energy fields such as fuel cells, flow batteries, electrolysis, and reverse electrodialysis power generation. In particular, the electromembrane process using an ion exchange membrane has a high degree of freedom in system design and manufacturing, so the device is highly expandable, and it has many advantages as a sustainable, eco-friendly energy technology driven by electric energy.

An ion exchange membrane is disclosed in Korean Patent Publication No. 10-2020-0036139.

Conventional ion exchange membranes (heterogeneous ion exchange membranes manufactured by including polymer support materials used for structural support and mechanical rigidity enhancement without ion exchange capacity) have high adhesion between the interface of the support layer and the polymer electrolyte membrane, and minimize the difference in swelling degree to enhance structural stability. However, conventional technologies have a problem in that structural stability is not excellent because they are designed to reduce the difference in swelling degree. In addition, the distribution of non-conductive (non-exchangeable) materials inside the heterogeneous ion exchange membrane causes the electrochemical performance to deteriorate compared to the homogeneous ion exchange membrane. Therefore, analyzing the ion transport characteristics of homogeneous ion exchange membranes with excellent electrochemical performance and the changes in flow occurring in the channels can be utilized as important basic data for improving and optimizing the performance of electromembrane systems.

In the conventional electrochemical membrane process, research on ion exchange membranes has mainly been conducted based on input and output from a macroscopic perspective rather than on microscopic phenomena occurring at the membrane interface due to technical limitations. However, recently, with the expansion of microfluidic system research based on microfabrication technology, flow visualization that can monitor internal flow in real time has become easier, enabling more intuitive phenomenon analysis and variable optimization. Nevertheless, in the case of homogeneous ion exchange membranes, visualization of electric eddy current phenomena occurring near ion exchange membranes has mostly been conducted mainly for heterogeneous ion exchange membranes due to weak mechanical stiffness and non-uniform swelling characteristics.

There are few previous studies on homogeneous ion exchange membranes due to technical limitations for visualization, and the visualization results are not as clear as those of heterogeneous ion exchange membranes. In addition, flow visualization studies on commercialized solid Nafion ion exchange membranes have rarely been conducted, and thus, research on this is necessary.

The present invention aims to solve the problems of the prior art as described above and the technical tasks requested from the past.

Specifically, the purpose of the present invention is to visualize the electric eddy flow occurring on the surface of a homogeneous ion exchange membrane by complementing the mechanical rigidity and non-uniform swelling characteristics, which are the weaknesses of a homogeneous ion exchange membrane, and to measure the electrical response according to the change in the flow characteristics changing on the surface of the ion exchange membrane. To this end, an ion exchange membrane swelling supporter (IEM swelling supporter) is developed to provide a homogeneous ion exchange membrane swelling supporter capable of minimizing the non-uniform swelling of a Nafion ion exchange membrane, and an ion exchange membrane device including the same.

According to one aspect of the present invention, there is provided a plate-shaped ion exchange membrane support; a double-sided tape having one side attached to the ion exchange membrane support; a rear tape having the other side attached to the double-sided tape; a homogeneous ion exchange membrane positioned and attached on the rear tape; and a front tape positioned and attached on the homogeneous ion exchange membrane; wherein the ion exchange membrane support, the double-sided tape, the rear tape, and the front tape each have ion exchange holes formed in their central portions, and the homogeneous ion exchange membrane is exposed to the ion exchange holes.

The above ion exchange membrane support prevents the homogeneous ion exchange membrane from swelling unevenly during the ion exchange process with the solution reacting with the ion exchange pores.

The above ion exchange membrane support is made of plastic.

According to one aspect of the present invention, a plurality of swelling supports according to claim 1, which are spaced apart from each other; an anode spaced apart from one side of the plurality of swelling supports; a cathode spaced apart from the other side of the plurality of swelling supports and facing the anode; and a fixing member for fixing the plurality of swelling supports, the anode, and the cathode in a spaced apart state from each other.

A main channel through which a solution moves is formed between the homogeneous ion exchange membranes of the plurality of swelling supports, and an electrode rinsing channel through which a solution moves and impurities of the cathode and the anode are removed is formed between the swelling supports and the anode, respectively.

The above swelling support prevents leakage between channels and uneven swelling of the homogeneous ion exchange membrane during the ion exchange process with the solution in which the homogeneous ion exchange membrane reacts.

The above fixed member has a plurality of slots formed spaced apart from each other.

As described above, the swelling support of the homogeneous ion exchange membrane according to the present invention can solve the non-uniform swelling characteristics of the homogeneous ion exchange membrane.

In addition, the low mechanical strength of the homogeneous ion exchange membrane can be improved.

In addition, the generation and growth of electric eddies according to voltage can be clearly observed by minimizing non-uniform swelling.

In addition, by visualizing the electric eddy current generated in a homogeneous ion exchange membrane, a homogeneous ion exchange membrane of superior quality can be provided.

FIG. 1 is a schematic diagram of a homogeneous ion exchange membrane and an ion exchange membrane device including the same according to one embodiment of the present invention.

Figure 2 is a schematic diagram of the electrodes in an ion exchange membrane device.

Figure 3 is a schematic diagram showing the cross-section of a swelling support.

Figure 4 is a schematic diagram showing an experimental setup for an ion exchange membrane device.

Figures 5 (a) and 5 (c) are photographs showing the surface of a homogeneous ion exchange membrane, and Figures 5 (b) and 5 (d) are photographs showing the surface of a heterogeneous ion exchange membrane.

Figure 6 is a drawing showing a visualization experiment on the electric eddy current phenomenon occurring at the interface of homogeneous and heterogeneous ion exchange membranes when no flow velocity is applied, and Figure 7 is a drawing showing a visualization experiment on the electric eddy current phenomenon occurring at the interface of homogeneous and heterogeneous ion exchange membranes when a flow velocity is applied.

Figures 8 and 9 are diagrams showing current-voltage characteristic curves for electrical response according to the homogeneity of the ion exchange membrane.

The embodiments described below are provided so that those skilled in the art can easily understand the technical idea of the present invention, but the present invention is not limited thereto. In addition, the matters expressed in the attached drawings are exaggerated and schematic drawings for easily explaining the embodiments of the present invention, and may differ from the form actually implemented.

When it is said that a component is connected or coupled to another component, it should be understood that it may be directly connected or coupled to that other component, but there may also be other components in between.

FIG. 1 is a schematic diagram of a swelling support of a homogeneous ion exchange membrane and an ion exchange membrane device including the same according to one embodiment of the present invention, FIG. 2 is a schematic diagram of a section between electrodes in an ion exchange membrane device, and FIG. 3 is a schematic diagram schematically showing a cross-section of the swelling support.

Referring to FIGS. 1 to 3 together, a swelling support (100) of a homogeneous ion exchange membrane according to one embodiment of the present invention is configured to include an ion exchange membrane support (110), a double-sided tape (120), a back tape (130), a homogeneous ion exchange membrane (140), and a front tape (150).

The ion exchange membrane support (110) is a non-conductive plastic plate shape with a length longer than its width. The double-sided tape (120) is adhesive-able on both sides, and one side of the double-sided tape (120) is attached to the ion exchange membrane support (110). In addition, a backside tape (130) is attached to the other side of the double-sided tape (120).

The back tape (130) can be attached on both sides, is attached by the adhesive surface on one side of the double-sided tape (120), and the adhesive surface of the back tape (130) is attached to the homogeneous ion exchange membrane (140).

A homogeneous ion exchange membrane (140) is attached to one side of the homogeneous ion exchange membrane (140) by the rear tape (130).

The front tape (150) is attached to the opposite side of the homogeneous ion exchange membrane (140) to which the back tape (130) is attached.

In this way, it is preferable that each swelling support (100, 101) including the ion exchange membrane support (110), double-sided tape (120), rear tape (130), homogeneous ion exchange membrane (140), and front tape (150) form a laminated structure.

The homogeneous ion exchange membrane (140) can also be structured to be interposed between ion exchange membrane supports (110), thereby further enhancing the effect of preventing uneven swelling. That is, in the structure described above, a double-sided tape may be attached to the front tape (150), and an ion exchange membrane support may be added to the double-sided tape.

In one specific example, the ion exchange membrane support (110), double-sided tape (120), back tape (130), and front tape (150) each have ion exchange holes (112, 122, 132, 152) perforated in their central portions (portions that come into contact with the electrolyte solution within the channels).

The length range of the ion exchange holes (112, 122, 132, 152) is preferably in the range of 2 mm to 20 mm, and may be 12 mm, for example. That is, the length of the ion exchange holes (112, 122, 132, 152) may be the effective ion exchange length (effective length, L _eft ).

By this structure, the homogeneous ion exchange membrane (140) comes into contact with the reaction liquid through the ion exchange pores (112, 122, 132, 152) and undergoes an ion reaction.

The above homogeneous ion exchange membrane (140) is exposed to the ion exchange holes (112, 122, 132, 152) and, in the process of ion exchange with the solution that comes into contact with it, leakage between channels and uneven swelling of the homogeneous ion exchange membrane are prevented by the ion exchange membrane support (110). In addition, uneven swelling is prevented, so that leakage of the reacted solution can be prevented. Here, the exposure of the homogeneous ion exchange membrane refers to the contact with the supplied solution so that a reaction can occur.

An ion exchange membrane device according to one embodiment of the present invention comprises a plurality of swelling supports (100, 101), an anode (200), a cathode (300), and a fixing member (400).

A plurality of bulging supports (100, 101) are spaced apart from each other and fixed to the central portion of the fixing member (400).

The anode (200) is positioned between one swelling support (101) and one fixed member (400) and is spaced apart from one end of one swelling support (101) and one end of the fixed member (400).

The cathode (300) is positioned between another swelling support (100) and a fixing member (400) at a position opposite to the anode (200) and is spaced apart from one end of the other swelling support (100) and the fixing member (400).

Carbon paper is inserted at the outermost side and used as the positive and negative electrodes respectively.

The fixed member (400) is made of a flexible transparent material made of a PDMS (Polydimethylsiloxane) polymer compound.

The fixed member (400) has a plurality of slots (410) formed spaced apart from each other so that the swelling support (100, 101), the positive electrode (200), and the negative electrode (300) can be fixed in a spaced apart state.

The fixed member (400) is plasma bonded in a state where the swelling support (100, 101), the anode (200) and the cathode (300) are each joined to a plurality of slots (410) and separated in a symmetrical shape.

These fixed members (400) have three inlets formed on one side for injecting the solution and three outlets formed on the other side for discharging the solution. Each of the inlets and outlets of the fixed members (400) has a path formed so that it is connected to a channel through which the solution moves.

The channel through which the solution of the fixed member (400) moves is configured to include a main channel (1) between a plurality of swelling supports (100, 101), an electrode rinsing channel (2) between the anode (200) and one swelling support (101), and another electrode rinsing channel (3) between the cathode (300) and another swelling support (100). Accordingly, a flow path having three inlets and outlets formed in the fixed member (400) is connected to the main channel (1) and the electrode rinsing channels (2, 3) in directions orthogonal to the plane, so that the solution can be supplied and discharged, respectively.

The lengths (l1, l2, l3) of the main channel (1) and the electrode rinsing channels (2, 3) are preferably in the range of 1 mm to 3 mm, and may be, for example, 1.5 mm.

And, the height (h1, h2, h3) range of the main channel (1) and the electrode rinsing channels (2, 3) is preferably in the range of 0.1 mm to 1 mm, and may be 0.2 mm, for example.

Accordingly, only the homogeneous ion exchange membrane (140) comes into contact with the solution in the main channel (1) and the electrode rinsing channels (2, 3) to perform ion exchange.

According to the present invention, an electric eddy current phenomenon can be observed in the main channel (1), thereby visualizing the electric eddy current phenomenon.

In the above electrode rinsing channel (2, 3), impurities generated on the electrode by the reaction (e.g. bubbles caused by the electrode reaction) are removed.

Figure 4 is a schematic diagram showing an experimental setup for an ion exchange membrane device.

Referring to FIG. 4 together with FIGS. 1 to 3, an experimental device and setup for conducting an experiment is illustrated, and an image captured between the swelling supports (100, 101) by a CCD camera is illustrated.

The microfluidic device includes an ion exchange membrane device fixed internally and is equipped with a number of connecting members for easy connection to peripheral devices.

The microfluidic device was connected to a syringe pump (Fusion 200-X, Chemyx, Inc.) to supply and recover fluid to the ion exchange membrane device. A sodium chloride (NaCl, 10 mM) solution was used to supply the main channel (1) of the ion exchange membrane device, and a sodium sulfate aqueous solution (Na ₂ SO ₄ , 5 mM) was used to supply the rinsing channels (2, 3) of the ion exchange membrane device. For flow visualization, a solution mixed with a fluorescent dye (Alexa 488 Triethylammonium, Thermo Fisher Scientific, 19.09 μM) was used to supply the main channel (1). A source measurement unit (SMU (Source Measurement Unit, Keithley 2460, Keithley Instruments, Inc.)) was connected to the microfluidic device to apply and measure current/voltage.

An LED light source connected to a microfluidic device irradiates the ion exchange membrane device with LED light, and an image captured by a CCD camera captures the image between the swollen supports (100, 101) spaced apart from each other in the ion exchange membrane device. In the drawing, a desalination layer (Dilute) without ions is observed in the swollen support (100) on the lower side spaced apart from each other in the ion exchange membrane device, and a concentrated ion layer (Concentrate) is observed in the swollen support (101) on the upper side.

In this way, according to the present invention, electric eddies generated in a homogeneous ion exchange membrane can be visualized.

Figures 5 (a) and 5 (c) are photographs showing the surface of a homogeneous ion exchange membrane, and Figures 5 (b) and 5 (d) are photographs showing the surface of a heterogeneous ion exchange membrane.

In Fig. 5 (a) and Fig. 5 (c), the surface of Nafion 211, which is an example of a homogeneous ion exchange membrane, does not show any foreign substances or substances causing inhomogeneity and has a smooth ion exchange surface. However, when the ion exchange membrane is in a swollen state, the surface of the ion exchange membrane is not flat but is curved, or micro-sized pores are formed on the surface of the ion exchange membrane, and electric eddies are generated by the geometric shape of the surface.

In contrast, Fig. 5 (b) and Fig. 5 (d) show that the surface of Ralex CMHPP, a heterogeneous ion exchange membrane, is manufactured by combining a mesh-type structural support for structural reinforcement and a polymer binder for supporting ion exchange resin. In the case of the polymer binder and the structural reinforcement, a non-conductive region without ion exchange ability is formed, causing current concentration and local ion concentration differences, which are causes of electric eddies.

Figure 6 is a drawing showing a visualization experiment on the electric eddy current phenomenon occurring at the interface of homogeneous and heterogeneous ion exchange membranes when no flow velocity is applied, and Figure 7 is a drawing showing a visualization experiment on the electric eddy current phenomenon occurring at the interface of homogeneous and heterogeneous ion exchange membranes when a flow velocity is applied.

To compare the electric eddy phenomenon occurring at the interface of homogeneous and heterogeneous ion-exchange membranes, visualization experiments were performed on Nafion 211 (homogeneous) and Ralex CMHPP (heterogeneous). For the two ion-exchange membranes, the generation and growth process of electric eddies according to time (5 s, 10 s, 20 s, 40 s) and the difference in applied voltage (5 V, 10 V, 20 V) in the cases of no shear flux and the presence of shear flux are shown. As the voltage is applied, an ion depletion region (black region) where ions are removed and the ion concentration decreases and a region where ions exist (bright region) are generated.

In Fig. 6, when the flow rate is not applied, it is difficult to confirm the change in the flow in the homogeneous ion exchange membrane (Nafion 211) initially (before 5 seconds), but it can be confirmed that additional flow is activated at the interface as electric vortices are generated over time. In contrast, in the case of the heterogeneous ion exchange membrane (Ralex CMHPP), it can be observed that electric vortices are generated quickly as soon as the voltage is applied. This is because in the case of the ion exchange membrane with large surface heterogeneity, the local ion concentration decreases rapidly due to the current concentration phenomenon since the heterogeneity exists in the area below 100 μm. Therefore, when comparing the homogeneous ion exchange membrane (Nafion 211) and the heterogeneous ion exchange membrane (Ralex CMHPP), the heterogeneous ion exchange membrane (Ralex CMHPP) causes more active horizontal flow, which generates a larger number of electric vortices. On the other hand, in the case of the homogeneous ion exchange membrane (Nafion 211), the initial occurrence time is longer, and the growth of wide, gentle, and small number of electric vortices is observed. In particular, the spread-out electric vortices with a small contact angle with the membrane surface, which are easily observed in the homogeneous ion exchange membrane (Nafion 211), are unfavorable for electric convection in the vertical direction, which is the current direction, and are therefore inefficient from the perspective of ion transport.

In Fig. 7, when a flow rate is applied, an ion depletion region occurs on the surfaces of the two ion exchange membranes at a low voltage (0 to 5 V), but it is difficult to confirm a large difference in the entire channel. As the voltage increases thereafter, electric eddies are generated, and it can be confirmed that eddy electric convection actively exists at the interface. When examining the flow of the heterogeneous ion exchange membrane (Ralex CMHPP) at a high voltage (10 to 20 V in the figure), ion mixing occurs more actively due to the increase in the concentration boundary layer due to the electric eddy near the membrane. On the other hand, in the case of the homogeneous ion exchange membrane (Nafion 211), a boundary layer formed gently can be confirmed similar to when there is no flow rate. In terms of ion transport within the channel, it can be confirmed that ion transport by electric eddies from the bulk fluid to the ion exchange membrane surface is more unfavorable in the case of a homogeneous ion exchange membrane (Nafion 211), whereas ion transport by electric eddies within the channel is more advantageous in the over-limit current range in the case of a heterogeneous ion exchange membrane (Ralex CMHPP).

Figures 8 and 9 are diagrams showing current-voltage characteristic curves for electrical response according to the homogeneity of the ion exchange membrane.

In order to verify the electrical response according to the homogeneity of the ion exchange membrane, the current-voltage characteristic curve was measured. At this time, the flow rate was applied at 0.5 mm/s, and the voltage was measured at 0.3 V intervals from 0 V to 15 V for 30 s (seconds) per interval. The current value at which the linear voltage-current section due to diffusion in the electric membrane process ends is called the limiting current, and it is governed by the Lㅹvㅺque equation, which is as follows:

Equation (1):

Here, F is the Faraday constant, D is the electrolyte diffusion coefficient, z is the ion charge, C is the molar concentration of the solution, δ is the thickness of the diffusion boundary layer of the ion exchange membrane, T and t are the effective transport number of the counter ion and the transport number in the solution, respectively. When comparing the limiting current of the homogeneous ion exchange membrane (Nafion 211) and the heterogeneous ion exchange membrane (Ralex CMHPP), it can be confirmed that the limiting current value is higher than 3 mA/cm ² in the case of the homogeneous ion exchange membrane (Nafion 211), whereas it is lower at around 1.5 mA/cm ² in the case of the heterogeneous ion exchange membrane (Ralex CMHPP). This result is due to the difference in the thickness of the diffusion boundary layer depending on the type of ion exchange membrane in Equation (1) and the difference due to the heterogeneity of the ion exchange membrane surface.

Based on the current-voltage characteristic curves, the length of the ohmic section (Ohmic length), the length of the limiting current section (Plateau length), and the slope of the overlimiting current section (Overlimiting slope) were investigated in detail for the homogeneous ion exchange membrane (Nafion 211) and the heterogeneous ion exchange membrane (Ralex CMHPP). The length of the Ohmic section is longer by more than 2 V for the homogeneous ion exchange membrane (0 to 4 V) than for the heterogeneous ion exchange membrane (0 to 2 V), which means that the homogeneous ion exchange membrane may be more advantageous than the heterogeneous ion exchange membrane in the low voltage section where energy efficiency is important. In the case of the length of the limiting current section (Plateau length), the homogeneous ion exchange membrane is more than 8 times longer than the heterogeneous ion exchange membrane, which means that the heterogeneity of the membrane surface forms active electric eddies, so it can be seen that the heterogeneous ion exchange membrane enters the overlimiting current section faster. The slope of the overlimiting current section is higher in the heterogeneous ion exchange membrane due to the active formation of electric eddies, as confirmed in the previous fluorescence image. In summary, in the low voltage section, the homogeneous ion exchange membrane with a longer ohmic section is more advantageous for ion transport, but in the high voltage section, the overlimiting current region, the heterogeneous ion exchange membrane enables better ion transport due to the active formation and growth of electric eddies.

According to the present invention, in order to confirm the change in the flow characteristics and ion exchange characteristics due to the homogeneity of the ion exchange membrane, the electric eddy of a homogeneous ion exchange membrane (Nafion 211), which has been technically difficult so far, was visualized and compared with that of a heterogeneous ion exchange membrane (Ralex CMHPP). To this end, a new swelling support was designed and manufactured to solve the non-uniform swelling characteristics of the homogeneous ion exchange membrane, and the electric eddy phenomenon of the homogeneous ion exchange membrane could be observed in more detail. A PDMS-based ion exchange membrane device was manufactured to obtain current-voltage characteristic curves, and a scanning electron microscope (SEM) image was taken to observe the surface of the ion exchange membrane.

According to the present invention, the following two facts were confirmed. First, through electric eddy visualization, it was confirmed that the electric eddy of a homogeneous ion exchange membrane is smaller and more widely spread than that of a heterogeneous ion exchange membrane, which is disadvantageous for ion transfer through electric convection.

Second, through current-voltage measurements, it was confirmed that in the case of homogeneous ion exchange membranes, although the length of the ohmic section is long and thus has a larger limiting current, as the voltage increases, the limiting current section is long and the slope of the overlimiting current section is gentle, making it more disadvantageous in terms of ion transfer than the heterogeneous ion exchange membrane. Accordingly, it is expected that visualization for understanding the ion transfer phenomenon of various homogeneous ion exchange membranes as well as Nafion 211 homogeneous ion exchange membranes and development of applied research utilizing homogeneous ion exchange membranes can be expected.

Therefore, the swelling support of a homogeneous ion exchange membrane according to the present invention and the ion exchange membrane device including the same can solve the non-uniform swelling characteristic of a homogeneous ion exchange membrane, improve the low mechanical rigidity of the homogeneous ion exchange membrane, and minimize non-uniform swelling to clearly show the generation and growth of electric eddies according to voltage. In addition, it provides the effect of visualizing the electric eddies generated in the homogeneous ion exchange membrane, thereby providing a homogeneous ion exchange membrane of superior quality.

Those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical idea or essential characteristics thereof. Therefore, the embodiments described above are merely the most preferable embodiments selected from among various possible embodiments to help those skilled in the art understand, and the technical idea of this invention is not necessarily limited or restricted to the presented embodiments, and various changes, additions, and modifications are possible within the scope that does not depart from the technical idea of the present invention, and it is to be understood that other equivalent embodiments are possible.

According to the present invention, the non-uniform swelling characteristic of a homogeneous ion exchange membrane can be solved, the low mechanical rigidity of the homogeneous ion exchange membrane can be improved, the non-uniform swelling can be minimized to clearly show the generation and growth of electric eddies according to voltage, and the electric eddies generated in the homogeneous ion exchange membrane can be visualized to provide a homogeneous ion exchange membrane of excellent quality.

Claims (7)

Plate-shaped ion exchange membrane support; A double-sided tape having one side attached to the ion exchange membrane support; A back tape on which a side is attached to the double-sided tape; A homogeneous ion exchange membrane positioned and attached on the above rear tape; and A front tape positioned and attached on the above homogeneous ion exchange membrane; including; The ion exchange membrane support, the double-sided tape, the back tape and the front tape each have ion exchange holes perforated in the central portion. A swelling support for a homogeneous ion exchange membrane, characterized in that the homogeneous ion exchange membrane is exposed to the ion exchange pores. In paragraph 1, The above ion exchange membrane support is a swelling support for a homogeneous ion exchange membrane, characterized in that it prevents non-uniform swelling during an ion exchange process with a solution in which the homogeneous ion exchange membrane is exposed to the ion exchange pores and reacts. In paragraph 1, A swelling support for a homogeneous ion exchange membrane, characterized in that the ion exchange membrane support is made of a plastic material. A plurality of swellable supports according to claim 1, which are spaced apart from each other; An anode spaced apart from one side of the plurality of above-mentioned swelling supports; A cathode spaced apart from the other side of the plurality of swelling supports and facing the anode; and An ion exchange membrane device characterized by comprising a plurality of swollen supports, a fixing member in which the anode and the cathode are fixed in a mutually spaced state. In paragraph 4, A main channel through which a solution moves is formed between the homogeneous ion exchange membranes of the above-mentioned plurality of swelling supports, An ion exchange membrane device characterized in that electrode rinsing channels are formed between the swelling support and the anode, and between the swelling support and the cathode, respectively, through which a solution moves and impurities of the cathode and the anode are removed. In paragraph 5, An ion exchange membrane device characterized in that the above swelling support prevents leakage and uneven swelling between channels during an ion exchange process with a solution in which a homogeneous ion exchange membrane is reacted. In paragraph 4, An ion exchange membrane device characterized in that a plurality of slots are formed spaced apart from each other in the above-mentioned fixed member.

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