KR101756327B1 - Manufacturing Method of Electrode for Membrane Capacitive Deionization Process - Google Patents
Manufacturing Method of Electrode for Membrane Capacitive Deionization Process Download PDFInfo
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- KR101756327B1 KR101756327B1 KR1020150064433A KR20150064433A KR101756327B1 KR 101756327 B1 KR101756327 B1 KR 101756327B1 KR 1020150064433 A KR1020150064433 A KR 1020150064433A KR 20150064433 A KR20150064433 A KR 20150064433A KR 101756327 B1 KR101756327 B1 KR 101756327B1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4691—Capacitive deionisation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
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Abstract
More particularly, the present invention relates to a method for manufacturing a membrane electrodeionization desalination process, and more particularly, to a method of manufacturing a membrane electrode assembly for a membrane electrodeionization process by applying a polymer resin solution having a cation exchanger and a polymer resin solution having an anion- A method of manufacturing an electrode, and an electrode manufactured using the method. The electrochemical electrode and the electrochemical cell using the electrochemical electrode according to the present invention can increase the adsorption / desorption rate of ions dissolved in water, increase the adsorption efficiency, and minimize deterioration in performance according to long-term use.
Description
More particularly, the present invention relates to a method for manufacturing a membrane electrodeionization desalination process, and more particularly, to a method of manufacturing a membrane electrode assembly for a membrane electrodeionization process by applying a polymer resin solution having a cation exchanger and a polymer resin solution having an anion- A method of manufacturing an electrode, and an electrode manufactured using the method.
The capacitive deionization (CDI) process is a technique for removing ions by utilizing the adsorption reaction of ions by the electrical attraction generated in the electric double layer formed on the electrode surface when a potential is applied to the electrode. Specifically, the electrolytic desalination process removes the ionic substances in the influent water by the adsorption reaction in the electric double layer formed on the electrode surface when the electrode potential of 1 to 2 volts (V) is applied, The electrode potential is switched to 0 volts (V) or the opposite potential to desorb the adsorbed ions to regenerate the electrode. Such a capacitive desalination process operates at a low electrode potential (about 1 to 2 V) and, as a result, energy consumption is lower than other desalting technologies, and thus it is evaluated as a next generation desalination technology with low energy consumption.
Porous carbon electrodes are often used as electrodes in the electrochemical desalination process. At this time, due to the rapid change of the electrode potential, ions adsorbed on the electrodes and ions of opposite charges move to the electric double layer, There arises a problem that the adsorption efficiency of the electrode is reduced due to the presence of the catalyst on the surface of the electrode.
In order to solve the above problems, a membrane storage type desalination (MCDI) device in which an ion exchange membrane is physically bonded to a conventional electrode has been developed and the adsorption efficiency can be increased by the combination of the carbon electrode and the ion selective membrane, The exchange membrane has a problem that the economical efficiency is low as an expensive material.
SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an electrochemical electrode having increased absorption / desorption efficiency by directly coating an ion exchange polymer on a carbon electrode without using an expensive ion exchange membrane.
In order to accomplish the above object, the present invention provides a method for producing a carbon electrode, comprising: preparing a coating solution by dissolving a polymer resin having a cation or anion exchanger in an organic solvent, applying the coating solution to a carbon electrode, And drying the electrochemical electrode for electrodeposition.
In the production process of the present invention, the polymer resin having the cation exchanger used for the production of the cathode electrode may be a sulfonated polyether ether ketone (S-PEEK), a sulfonated polyphenylene oxide (PVA / PSSA_MA / SSA, polyvinyl alcohol / poly (styrene sulfonic acid-co-maleic acid) / sulfosalicylic acid) and polyvinyl alcohol / polystyrene sulphosulfone-maleic acid / sulfosalicylic acid (A-PSF), aminated polyetherimide (A-PEI), polyetherimide (A-PEI), and the like. , Aminated polyphenylene oxide (A-PPO), and polyvinyl alcohol / polyvinyl amine (PVA / PVAm).
In one embodiment of the present invention, when the polymer resin having the cation exchanger is polyvinyl alcohol / polystyrenesulfonic acid-maleic acid / sulfosalicylic acid (PVA / PSSA_MA / SSA), polyvinyl alcohol: polystyrenesulfonic acid-maleic acid : The mixing ratio of sulfosalicylic acid is 100: 70 ~ 90: 7 ~ 13 mass ratio, and in the drying step, crosslinking may be carried out at 100 ~ 140 ° C for 4 ~ 12 hours.
In another embodiment of the present invention, when the polymer resin having an anion exchanger is polyvinyl alcohol / polyvinylamine (PVA / PVAm), the mixing ratio of polyvinyl alcohol: polyvinylamine is 5 to 90: 95 To 10 mass%, and crosslinking at 120 to 170 ° C for 0.5 to 6 hours in the drying step.
In the present invention, the drying step is performed at 40 to 120 ° C. for 4 to 24 hours.
In the present invention, the organic solvent may be selected from the group consisting of N-methylpyrrolidone (NMP), dimethylacetamide (DMAc), and dimethylformamide (DMF).
In the present invention, the coating method may be selected from the group consisting of coating using a brush, spray coating, dip coating, knife casting, doctor blade and spin coating, but is not limited thereto.
In the present invention, when the coating solution is applied to the carbon electrode, the thickness of the coating solution may be 3 to 200 탆, preferably 30 to 40 탆.
Still another aspect of the present invention is to provide a method for producing a polyether polyol, which comprises reacting a sulfonated polyether ether ketone (S-PEEK), a sulfonated polyphenylene oxide (S-PPO) and a polyvinyl alcohol / Wherein the polymer resin having at least one cation exchanger selected from the group consisting of polystyrene sulphosulfone-maleic acid / sulfosalicylic acid (PVA / PSSA_MA / SSA, polyvinyl alcohol / poly (styrene sulfonic acid-co-maleic acid) / sulfosalicylic acid) A negative electrode coated on the electrode; Aminated polysulfone (A-PSF), aminated polyetherimide (A-PEI), aminated polyphenylene oxide (A-PPO), and polyvinyl alcohol / Polyvinylamine (PVA / PVAm, polyvinyl alchol / polyvinyl amine) is applied to a carbon electrode; a positive electrode coated with a polymeric resin having at least one anion-exchange group selected from the group consisting of polyvinylamine And a spacer positioned between the cathode and the anode. The present invention also provides an electrochemical cell for membrane storage and desalting.
In one embodiment of the present invention, when the polymer resin having the cation exchanger is polyvinyl alcohol / polystyrenesulfonic acid-maleic acid / sulfosalicylic acid (PVA / PSSA_MA / SSA), polyvinyl alcohol: polystyrenesulfonic acid-maleic acid : The mixing ratio of sulfosalicylic acid may be 100: 70 ~ 90: 7 ~ 13 mass ratio.
In another embodiment of the present invention, when the polymer resin having an anion exchanger is polyvinyl alcohol / polyvinylamine (PVA / PVAm), the mixing ratio of polyvinyl alcohol: polyvinylamine is 5 to 90: 95 To 10 mass%.
In the present invention, the thickness of the coating solution applied to the electrode may be 3 to 200 탆, preferably 30 to 40 탆.
The electrochemical electrode and the electrochemical cell using the electrochemical electrode according to the present invention can increase the adsorption / desorption rate of ions dissolved in water, increase the adsorption efficiency, and minimize deterioration in performance according to long-term use.
In addition, since the ion exchange membrane is not used in the storage type desalination process, not only the interval between the electrodes can be minimized, but the formation of the upper coating layer does not impair the surface smoothness due to the electrode active material, And the electrode active material can be prevented from being released. Therefore, even if a module having a plurality of laminated structures is manufactured, it can be used stably for a long period of time. Thus, there is an advantage that the reliability of the product is improved, and the module can be enlarged.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an SEM photograph of a cross section of an electrochemical electrode according to Production Example 2-1 of the present invention coated with an ion exchange solution. FIG.
FIG. 2 is a simplified view of an experimental module for membrane desalination experiments according to an embodiment of the present invention. FIG.
3 is a graph showing changes in concentration of effluent water with respect to time in desorption / adsorption experiments according to Examples 17 to 20 (using electrodes according to Production Example 2 (cathode) and Production Example 4 (anode) of the present invention).
FIG. 4 is a graph showing changes in concentration of effluent water by concentration / time of NaCl according to Examples 17 to 20 of the present invention. FIG.
FIG. 5 is a graph showing desalting effects according to NaCl concentrations according to Examples 17 to 20 of the present invention. FIG.
6 shows the concentration of NaCl, CaSO 4 , and MgCl 2 mixed solution / hourly effluent concentration according to Example 65 of the present invention and Example 66 (use of electrode according to Production Example 3 (cathode) and Production Example 4 (anode) Fig.
FIG. 7 is a graph showing the desalting effects of NaCl, CaSO 4 , and MgCl 2 mixed solutions according to Example 65 and Example 66 of the present invention. FIG.
Hereinafter, preferred embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. The embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below.
Manufacturing example
1. Manufacture of electrode for cathode
In the present invention, a solution containing a cation-exchange polymer material was coated on the surface of a carbon electrode to prepare a composite electrode for a cathode. A cation-exchange polymer material used for a cathode electrode was sulfonated polyetheretherketone (S-PEEK sulfonated polyether ether ketone, sulfonated polyphenylene oxide (S-PPO) and polyvinyl alcohol / polystyrene sulphosufa-maleic acid / sulfosalicylic acid (PVA / PSSA_MA / SSA, polyvinyl alcohol / poly sulfonic acid-co-maleic acid / sulfosalicylic acid. The manufacturing process of each negative electrode is described in detail below.
Manufacturing example 1-1. S-PEEK ( ulfonate 폴리 에테르 ether ketone ) Coated with a negative electrode
Polyetheretherketone (PEEK) was dissolved in sulfuric acid to conduct sulfonation, and the sulfonation reaction was carried out for 5 hours to 80 hours. The sulfonated solution was washed several times with distilled water to obtain a pH of 5.0~6.0. The polyetheretherketone having a cation exchanger was dried at 100~120 ° C. for 12 hours or more, and 8 wt% of NMP, DMAc, DMF To prepare a coating solution. The prepared polymer solution was coated on the surface of the porous carbon electrode and dried at 70 to 120 ° C. for 4 to 8 hours to prepare a cathode electrode having cation selectivity.
In the preparation example 1 of the present invention, the polymer solution was coated on the surface of the porous carbon electrode using a brush, but the thickness was not limited thereto, and the coating thickness was 3 to 2000 μm, preferably 30 to 40 μm The desalting efficiency was the highest (result data omitted).
In the production example 1-1 of the present invention, the cation-exchange polymer can be variously prepared according to the sulfonation time (5 to 80 hours). In the following examples of the present invention, Coated electrodes were used, but higher efficiency was obtained with increasing sulfonation time (data not shown).
Manufacturing example 1-2. S-PPO ( ulfonated 폴리 페렌렌 oxide coated anode electrode
Polyphenylene oxide (PPO) was dissolved in chloroform at a concentration of 5 ~ 20 wt%, sulfonated with chlorosulfonic acid, and sulfonated for 1 ~ 5 hours. Then, the polyphenylene oxide having a cation exchanger was dissolved in methanol and dried in an oven, and then dissolved in an organic solvent such as NMP, DMAc, DMF or methanol at 8 wt% to prepare a coating solution. The prepared polymer solution was coated on the surface of the porous carbon electrode and dried at 60 to 80 ° C. for 4 to 8 hours to prepare a cathode electrode having cation selectivity.
Manufacturing example 1-3. PVA / PSSA_MA / SSA (Polyvinyl alcohol / Poly (styrene ulfonic acid-co-maleic acid / sulfosalicylic acid)
Polyvinyl alcohol (PVA) was dissolved in distilled water and polystyrene sulfonic acid-maleic acid (PSSA_MA) / sulfosalicylic acid (SSA) solution was added to prepare a coating solution.
Specifically, PVA, PSSA_MA and SSA (SSA is a reagent in the form of a solution phase) was dissolved in distilled water at 10 wt%, respectively. Aqueous PSSA_MA solution was added to the aqueous PVA solution at a constant rate and stirred for one day. Thereafter, SSA aqueous solution was added to the mixed solution at a predetermined ratio to prepare a coating solution. At this time, PSSA_MA aqueous solution was added at 70, 80 and 90 wt% with respect to the PVA aqueous solution mass, and SSA aqueous solution was added at 7, 9, 11 and 13 wt% based on the PVA aqueous solution mass.
The prepared polymer solution was coated on the surface of the porous carbon electrode, dried at 40 to 60 ° C. for 5 to 24 hours, and crosslinked at 100 to 140 ° C. for 4 to 12 hours to prepare a cathode electrode having cation selectivity.
In the production examples 1-3 according to the present invention, the cation exchange polymer can be variously prepared according to the ratio of the PVA / PSSA_MA / SSA solution. In the examples of the present invention, the polymer having the above ratio of 100: 90: Solution coated electrode was used. As the amount of PSSA_MA / SSA solution increased, the efficiency was higher (Result data omitted).
Manufacturing example
2. Manufacture of electrode for anode
In the present invention, a solution containing an anion-exchange polymer material was coated on the surface of a carbon electrode to prepare a composite electrode for a positive electrode. An aminated polysulfone (A-PSF) was used as an anion- , Aminated polyetherimide (A-PEI), aminated polyphenylene oxide (A-PPO) and polyvinyl alcohol / polyvinyl amine (PVA / PVAm), polyvinyl alchol / polyvinyl amine) was used. Each positive electrode manufacturing process is described in detail below.
In the following production examples of the present invention, chloromethylation of an anion-exchange polymer material may use one of chloromethyl methyl ether, bis chloromethyl ether, bromomethyl methyl ether, and trimethyl silyl chloride, and an anion exchange polymer May be carried out using one of zinc chloride, zinc bromide, stannic chloride, and aluminum chloride. In addition, the amination reaction of the following anion-exchange polymer can be carried out by selecting at least one of trimethylamine, triethylamine, tripropylamine and tributylamine.
In the production example 2 of the present invention, the anion exchange polymer can be produced by modifying the amine content with respect to the mass of the polymer at a ratio of 1: 1, 2: 1, 3: 1, 4: 1, Typically, an electrode coated with a polymer synthesized at a 2: 1 ratio of amine to polymer mass was used. When the amine content ratio was 1: 1 and 3: 1, the removal efficiency was lower when the amine content was lower than 2: 1, and when the amine content was increased, the removal efficiency was also increased Data omitted).
Manufacturing example 2-1. A positive electrode coated with Aminated Polysulfone (A-PSF)
Polysulfone was dissolved in DCE and chloromethylation was carried out by adding a certain amount of catalyst to accelerate the reaction. The methylation process was carried out at 30 to 50 ° C for 3 to 6 hours, washed with methanol and dried at 50 to 80 ° C. The coating solution was prepared by dissolving 8 wt% of polysulfone having an anion exchanger prepared in the above reaction in an organic solvent such as NMP, DMAc, DMF, and the like. The prepared polymer solution was coated on the surface of the porous carbon electrode and dried at 60 to 80 ° C. for 4 to 8 hours to prepare a positive electrode having anion selectivity.
In the preparation example 2 of the present invention, the polymer solution was coated on the surface of the porous carbon electrode using a brush, but the thickness was not limited thereto, and the coating thickness was 3 to 2000 μm, preferably 30 to 40 μm The desalting efficiency was the highest (result data omitted). FIG. 1 shows a SEM photograph of the electrode cross-section coated according to Production Example 2-1 of the present invention.
Manufacturing example 2-2. A-PEI (Aminated Polyetherimide) coated anode electrode
The polyetherimide was dissolved in DCE and chloromethylation was carried out by adding a certain amount of catalyst to accelerate the reaction. The methylation process was carried out at 60 to 80 ° C for 3 to 6 hours, washed with methanol and dried at 50 to 80 ° C. The coating solution was prepared by dissolving 8 wt% of polyetherimide having an anion exchanger prepared in the above reaction in an organic solvent such as NMP, DMAc or DMF. The prepared polymer solution was coated on the surface of the porous carbon electrode and dried at 60 to 80 ° C. for 4 to 8 hours to prepare a positive electrode having anion selectivity.
Manufacturing example 2-3. A-PPO (Aminated Polyphenylene Oxide) coated anode electrode
The polyphenylene oxide was dissolved in chloroform at 10 to 20 wt%, and a certain amount of a catalyst was added to accelerate the reaction to conduct chloromethylation. The methylation process was carried out at 40 to 80 ° C for 3 to 6 hours, washed with methanol and dried at 50 to 80 ° C. Polyphenylene oxide having an anion exchanger prepared by the above reaction was dissolved in an organic solvent such as NMP, DMAc or DMF in an amount of 8 wt% to prepare an amination reaction. The prepared polymer solution was coated on the surface of the porous carbon electrode and dried at 60 to 80 ° C. for 4 to 8 hours to prepare a positive electrode having anion selectivity.
Manufacturing example 2-4. PVA / PVAm (Polyvinyl alchol / polyvinyl amine) -coated anode electrode
Polyvinyl alcohol was dissolved in distilled water, and polyvinylamine having an amine group was mixed in a certain ratio and stirred for one day. In this case, the amount of polyvinyl alcohol: polyvinylamine may be added in a range of 5 to 90: 95-10 by mass, and the salt removal efficiency is increased as the amount of polyvinylamine in the polymer solution is increased (experimental data are omitted).
The prepared polymer solution was coated on the surface of the porous carbon electrode, dried at 60 ° C for 0.5 to 6 hours, and crosslinked at 120 to 170 ° C for 0.5 to 6 hours to prepare a positive electrode having anion selectivity.
Manufacturing example
3. MCDI cells and
Desalination
Module manufacturing
The cation exchange solution prepared in Preparation Example 1 was coated on the surface of the porous carbon electrode (3 kinds) and the anion exchange solution prepared in Preparation Example 2 was coated on the surface of the porous carbon electrode (4 kinds ) Were used to prepare 12 types of membrane storage type desalination (MCDI) cells of different combinations. To compare the desalting effects of the conventional porous carbon electrodes without the ion exchange polymer coating of the present invention, comparative examples were prepared.
The area of the carbon electrode in the MCDI cell is 10 × 10 cm 2 , and a spacer having a thickness of about 100 μm is sandwiched between the two carbon electrodes to prevent the cathode and the anode from contacting each other, , And the outer cell was constituted by Plexiglas (trade name). The channel was drilled with a 1 cm diameter hole at both diagonal ends of the cell and a 1 cm diameter hole was drilled in the center of the electrode so that the electrode was allowed to enter the two inlets and out through one of the outlets in the center. The effluent was supplied to the cell at a constant flow rate using a peristaltic pump. The adsorption and desorption experiments were performed by applying a constant potential using a potentiostat. TDS conductivity meter was connected to the outlet at the center of the cell to measure effluent.
The MCDI module according to the present invention is shown in FIG.
Example . Of the MCDI process Desalination Efficiency experiment
The salt removal rate (n d ,%) was measured as a result of the effluent from the MCDI cell module manufactured according to Preparation Example 3. The measurement formula was as shown in Equation 1 below.
[Equation 1]
Where C eff is the lowest concentration of discharged solution and C 0 is the initial concentration of feed water.
Example 1 to 48. Feed amount: by NaCl concentration Desalination Experiment
In the cell module manufactured in Production Example 3, a voltage of 1 V was constantly applied for 5 minutes during adsorption, and while maintaining at 0 V for 1 minute during desorption, a NaCl aqueous solution was supplied as a feed at 100 ppm, 200 ppm, 300 ppm , And 500 ppm, respectively, at a flow rate of 20 ml / min. The respective desalination efficiencies (%) were measured by the above equation (1). The experiment time was from 30 minutes to 12 hours at maximum. The performance of the electrode was not different from that of the first time even though the operation time was increased. The results shown in this patent are summarized in the experimental data of operating time between 6 and 8 hours.
Table 1 below shows the combination of electrodes used in the examples of the present invention in detail.
The results of the desalting efficiencies (%) according to Examples 1 to 48 and Comparative Examples 1 to 4 are shown in Table 2 below, and the results of Examples 17 to 20 are shown in FIGS. 3 to 5 specifically Respectively.
As can be seen from the following Table 2, when the electrode according to the present invention was used, the desalination efficiency was more than 90% at half or more, but the desalting efficiency was only about 44% at the conventional carbon electrode Could know.
Example 49 to 72. Feeds: NaCl, CaSO 4 , MgCl 2 By concentration of mixed solution Desalination Experiment
A 1V voltage was constantly applied to the cell module manufactured in Production Example 3 for 5 minutes at the time of adsorption, and a mixed solution of NaCl, CaSO 4 and MgCl 2 was supplied as a feed to 100 ppm and 300 ppm, respectively, and the respective desalting efficiencies (%) were measured according to the above equation (1) when supplied at a rate of 20 ml / min. The experiment time was from 30 minutes to 12 hours at maximum. The performance of the electrode was not different from that of the first time even though the operation time was increased. The results shown in this patent are summarized in the experimental data of operating time between 6 and 8 hours.
Table 3 below shows the combination of the electrodes used in the examples of the present invention in detail.
The results of the desalting efficiency (%) according to Examples 49 to 72, Comparative Example 5 and Comparative Example 6 are shown in Table 4 below, and the results of Examples 65 and 66 are shown in FIGS. 6 and 7 Respectively.
As can be seen from the following Table 4, when the electrode according to the present invention was used, the desalination efficiency was about 90% or more at half, while the desalting efficiency was only about 40% at the conventional carbon electrode Could know.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It is to be understood that the invention is not limited to the disclosed embodiments.
Claims (13)
A method for manufacturing an electrochemical electrode for a membrane storage type desalination process, comprising the steps of: preparing a positive electrode;
The step of preparing the negative electrode includes: preparing a coating solution by mixing a polyvinyl alcohol (PVA) aqueous solution, an aqueous polystyrene sulfonic acid-maleic acid (PSSA_MA) aqueous solution, and a sulfosalicylic acid (SSA) aqueous solution;
Applying the coating solution to a carbon electrode;
Drying the carbon electrode coated with the coating solution at 40 to 60 DEG C for 5 to 24 hours; And
Crosslinking the dried carbon electrode at 100 to 140 ° C for 4 to 12 hours,
The step of preparing the positive electrode includes: preparing a coating solution by dissolving an aminated polysulfone (A-PSF) in an organic solvent;
Applying the coating solution to a carbon electrode; And
And drying the carbon electrode coated with the coating solution at 60 to 80 ° C for 4 to 8 hours,
Wherein the weight ratio of the polyvinyl alcohol, polystyrenesulfonic acid-maleic acid and sulfosalicylic acid is 100: 70 to 90: 7 to 13, and a membrane-type desalination process for desalting a mixed solution of NaCl, CaSO 4 and MgCl 2 A method of manufacturing an electrochemical electrode.
An anode electrode; And
And a spacer positioned between the cathode electrode and the anode electrode,
Wherein the cathode electrode comprises: preparing a coating solution by mixing a polyvinyl alcohol (PVA) aqueous solution, an aqueous solution of polystyrene sulfonic acid-maleic acid (PSSA_MA) and a solution of sulfosalicylic acid (SSA);
Applying the coating solution to a carbon electrode;
Drying the carbon electrode coated with the coating solution at 40 to 60 DEG C for 5 to 24 hours; And
And crosslinking the dried carbon electrode at 100 to 140 ° C for 4 to 12 hours,
The anode electrode may be formed by dissolving an aminated polysulfone (A-PSF) in an organic solvent to prepare a coating solution;
Applying the coating solution to a carbon electrode; And
And drying the carbon electrode coated with the coating solution at 60 to 80 캜 for 4 to 8 hours,
Wherein the weight ratio of the polyvinyl alcohol, polystyrenesulfonic acid-maleic acid and sulfosalicylic acid is 100: 70 to 90: 7 to 13, and a membrane-type desalination process for desalting a mixed solution of NaCl, CaSO 4 and MgCl 2 Electrochemical cell.
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Non-Patent Citations (3)
| Title |
|---|
| Ji Sun Kim et al. "Application of synthesized anion and cation exchange polymers to membrane capacitive deionization(MCDI)". Macromolecular Research. Vol.23, Issue 4, pp. 360-366 (2015.03.20. 온라인 게재)* |
| Romklaw Boonpoo-nga et al. "Electrospun fibres from polyvinyl alcohol, poly(styrene sulphonic acid-co-maleic acid), and imidazole for proton exchange membranes". ScienceAsia. Vol.40, p. 232-237 (2014)* |
| 최재환 외. "Sulfonated Poly(Ether Ether Ketone)을 코팅한 이온선택성 복합탄소전극의 제조 및 전기화학적 특성 분석". Appl. Chem. Eng.. Vol.24, No.3, pp. 247-252 (2013)* |
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