CN110983364A - High-hydrophilicity diaphragm for electrolyzed water and preparation method thereof - Google Patents
High-hydrophilicity diaphragm for electrolyzed water and preparation method thereof Download PDFInfo
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- CN110983364A CN110983364A CN201911330199.3A CN201911330199A CN110983364A CN 110983364 A CN110983364 A CN 110983364A CN 201911330199 A CN201911330199 A CN 201911330199A CN 110983364 A CN110983364 A CN 110983364A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/70—Assemblies comprising two or more cells
- C25B9/73—Assemblies comprising two or more cells of the filter-press type
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/42—Polyamides containing atoms other than carbon, hydrogen, oxygen, and nitrogen
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B13/00—Diaphragms; Spacing elements
- C25B13/04—Diaphragms; Spacing elements characterised by the material
- C25B13/08—Diaphragms; Spacing elements characterised by the material based on organic materials
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0006—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using woven fabrics
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
- D06N3/0034—Polyamide fibres
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
- D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/14—Properties of the materials having chemical properties
- D06N2209/141—Hydrophilic
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/16—Properties of the materials having other properties
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Abstract
The invention discloses a high-hydrophilicity diaphragm for electrolyzed water, which is characterized by comprising a fabric and a coating layer coated on the fabric, wherein the fabric is prepared from 2,3,5, 6-tetrafluoro terephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide and phosphorus pentoxide according to the mass ratio of 100 (0.3-0.5); the coating is made of a zwitterionic 2, 5-diaminobenzenesulphonic acid/bisphenol a diglycidyl ether polycondensate. The invention also discloses a preparation method of the high-hydrophilicity diaphragm for electrolyzed water. The diaphragm for the electrolytic water disclosed by the invention has the advantages of excellent comprehensive performance, high air tightness, good ion permeability and hydrophilicity, high stability and mechanical strength and long service life.
Description
Technical Field
The invention relates to the technical field of membrane materials, in particular to a high-hydrophilicity diaphragm for electrolyzed water and a preparation method thereof.
Background
In recent years, with the progress of science and technology and the improvement of living standard, people have increasingly high demand for improvement of their physical qualities, and higher demands are made on safety and health functions of drinking water as a source of life. It is known that human body is composed of cells, human diseases can be finally attributed to cell damage, human aging is also caused by cell aging or necrosis, the main cause of cell morbidity or aging is malignant active oxygen, and the most safe and reliable and effective method for eliminating malignant active oxygen is to utilize hydrogen and malignant active oxygen to generate neutralization reaction so as to eliminate oxygen free radicals. Frequent drinking of water (hydrogen water) rich in hydrogen molecules can effectively remove oxygen free radicals in the body, reduce oxidative stress in the organism, and inhibit LDL increase in blood, thereby delaying aging, preventing and treating various chronic diseases, and promoting health.
Electrolytic water generation is currently a common method for producing hydrogen water. The hydrogen and oxygen generated by the electrolysis of water are separated by a diaphragm in the electrolytic cell, and the diaphragm of the electrolytic cell is used for preventing the products at the two poles of the electrolytic cell from being mixed with each other so as to ensure the purity of hydrogen and oxygen, prevent the explosion of the mixed hydrogen and oxygen and improve the current efficiency and the safety. Therefore, a separator for electrolyzed water having excellent performance is important for electrolysis efficiency and safety. The ideal diaphragm for electrolyzing water should be fully wetted by the electrolyte, small in average pore size, high in air tightness, large in porosity, certain in mechanical strength and rigidity, not corroded by the alkaline electrolyte, high in temperature resistance and chemical stability, and easy to implement industrialization.
The traditional diaphragm for electrolyzing water is made of asbestos, the performance of the diaphragm is unstable, when the brine contains calcium and magnesium impurities, hydroxide precipitates are easily generated in the diaphragm, and the permeability of anions/cations for electrolysis is reduced. At relatively high temperatures and under the action of the electrolyte, swelling and loosening can also occur. In view of this, some enterprises in the prior art generally adopt textiles made of polyphenylene sulfide fibers as a diaphragm for hydrogen production by water electrolysis. However, the glass transition temperature of polyphenylene sulfide fiber is only 85-90 ℃, most of the working condition temperature of hydrogen production by water electrolysis is increased from original 80 ℃ to above 90 ℃, and the diaphragm made of polyphenylene sulfide fiber works in a solution with the temperature above 90 ℃ for a long time, namely, the diaphragm is softened above the glass transition temperature of polyphenylene sulfide fiber, the mechanical strength of the diaphragm is greatly influenced, and the service life of the diaphragm under a part of high-temperature working conditions is shortened due to insufficient heat resistance of polyphenylene sulfide. Or under the working condition of oxygen enrichment and at high temperature, the SO bond is unstable to generate oxidation and lose mechanical strength, thereby influencing the use efficiency.
Chinese patent document CN101372752A disclosesThe non-woven fabric is made of ordinary polyphenylene sulfide fibers, and 90-98% of H is used at 70-130 DEG C2SO4And (3) carrying out sulfonation treatment for 20-40 minutes, and then treating with 30% potassium hydroxide to finally obtain the high-temperature-resistant alkaline water electrolyzer diaphragm. In the invention, because the liquid absorption rate of the non-woven fabric is relatively high, a large amount of precious water resources and chemicals are required to be consumed in the cleaning process after the strong acid treatment, the cleaning time is also long, the process operation is complex, and the environment is easily polluted. Meanwhile, the safety is poor, and the industrial production is not suitable.
Therefore, the diaphragm for electrolyzing water, which has the advantages of high air tightness, good ion permeability and hydrophilicity, high stability and mechanical strength and long service life, is developed to meet the market demand, has wide market value and application prospect, and has very important significance for promoting the development of the electrolysis industry.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the diaphragm for the electrolytic water, which has the advantages of excellent comprehensive performance, high air tightness, good ion permeability and hydrophilicity, high stability and mechanical strength and long service life; meanwhile, the invention also discloses a preparation method of the high-hydrophilicity diaphragm for electrolyzed water, which has the advantages of simple production process, no pollution to the environment, rich raw material sources, suitability for continuous large-scale production and higher economic value, social value and ecological value.
In order to achieve the aim, the invention adopts the technical scheme that the high-hydrophilicity diaphragm for the electrolyzed water is characterized by comprising a fabric and a coating layer coated on the fabric, wherein the fabric is prepared from 2,3,5, 6-tetrafluoro terephthalic acid, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide and phosphorus pentoxide according to the mass ratio of 100 (0.3-0.5); the coating is made of a zwitterionic 2, 5-diaminobenzenesulphonic acid/bisphenol a diglycidyl ether polycondensate.
Furthermore, a coupling agent is added into the fabric, and the mass of the coupling agent is 0.2-0.5 times of that of the phosphorus pentoxide.
Preferably, the coupling agent is at least one of a silane coupling agent KH550, a silane coupling agent KH560 and a silane coupling agent KH 570.
Further, the preparation method of the poly 2,3,5, 6-tetrafluoroterephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide comprises the following steps:
(1) adding 2,3,5, 6-tetrafluoroterephthalic acid, 2-bis [4- (4-aminophenoxy) phenyl ] propane, a catalyst and zeolite into a high-boiling-point solvent, and stirring for 20-30 minutes to obtain a mixed material;
(2) then transferring the mixed material into a high-pressure reaction kettle, replacing the air in the kettle with nitrogen or inert gas, keeping the temperature in the high-pressure reaction kettle at 265-285 ℃ and the pressure at 1.2-2.0MPa, stirring and reacting for 4-6h, then slowly exhausting gas and reducing the pressure to 0.8-1.2MPa within 1-2 h, simultaneously heating the temperature in the high-pressure reaction kettle to 290-300 ℃, and stirring and reacting for 1-2 h;
(3) and finally, under the vacuum condition, controlling the temperature between 230 ℃ and 250 ℃, stirring for reaction for 13-18h, cooling to room temperature, precipitating in water, washing the precipitated product with ethanol for 3-6 times, and then placing the product in a vacuum drying oven at 80-90 ℃ for drying to constant weight to obtain the poly 2,3,5, 6-tetrafluoro terephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide.
Preferably, the mass ratio of the 2,3,5, 6-tetrafluoroterephthalic acid to the 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane to the catalyst to the zeolite to the high-boiling-point solvent is 1:1.72 (0.3-0.5) to 0.3 (10-18).
Preferably, the high boiling point solvent is at least one of dimethyl sulfoxide, N-dimethylformamide, N-dimethylacetamide and N-methylpyrrolidone; the inert gas is one of helium, neon and argon; the catalyst is at least one of thiophosphonate, phosphorous acid and thiophosphoryl amide.
Further, the preparation method of the zwitterionic 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate comprises the following steps: adding 2, 5-diaminobenzene sulfonic acid, bisphenol A diglycidyl ether and an alkaline catalyst into N-methylpyrrolidone, stirring and reacting for 3-5 hours at 70-80 ℃, then adding hydrochloric acid with the mass percentage concentration of 5-10%, adjusting the pH to 6-8, then adding 2-chloroethyl 4-fluorophenyl sulfone, continuing stirring and reacting for 5-8 hours, then precipitating in water, washing the product for 3-5 times by using ethanol, and then placing in a vacuum drying oven for drying to constant weight at 80-90 ℃ to obtain the amphoteric 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate.
Preferably, the molar ratio of the 2, 5-diaminobenzene sulfonic acid to the bisphenol A diglycidyl ether to the basic catalyst to the N-methylpyrrolidone to the 2-chloroethyl 4-fluorophenyl sulfone is 1:1 (0.4-0.6) to (6-10) 2.
Preferably, the alkaline catalyst is at least one of sodium hydroxide, potassium hydroxide, sodium carbonate and potassium carbonate.
Another object of the present invention is to provide a method for preparing the highly hydrophilic separator for electrolyzed water, comprising the steps of:
step S1, mixing poly 2,3,5, 6-tetrafluoro terephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide, phosphorus pentoxide and a coupling agent in proportion, extruding and granulating, and then performing melt spinning to obtain the fabric fiber;
step S2, mixing the textile fiber prepared in the step S1 by a cotton mixer, carding into strips, and spinning into yarns; then making the yarns into a fabric through a loom;
and S3, dissolving the zwitterionic 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate in N, N-dimethylformamide to form a solution with the mass fraction of 40-60%, spraying the obtained solution on the surface of the fabric prepared in the S2, and drying at the temperature of 190-230 ℃ to constant weight to obtain a finished product.
Further, in step S2, the yarn count is 15 to 45 inches, and the fabric is one of plain weave, twill weave and satin weave.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
(1) the high-hydrophilicity diaphragm for electrolyzed water provided by the invention has the advantages of simple production process, no environmental pollution, rich raw material sources, suitability for continuous large-scale production and higher economic value, social value and ecological value.
(2) The diaphragm for high-hydrophilicity electrolytic water provided by the invention overcomes the defects that the traditional diaphragm for electrolytic water is unstable in performance, when salt water contains calcium and magnesium impurities, hydroxide precipitates are easily generated in the diaphragm, the transmittance of anions/cations for electrolysis is reduced, and expansion and loosening can occur at a higher temperature under the action of an electrolyte, and has the advantages of excellent comprehensive performance, high air tightness, good ion permeability and hydrophilicity, high stability, weather resistance and mechanical strength and long service life.
(3) According to the high-hydrophilicity diaphragm for electrolyzed water, the structures such as fluorobenzene, benzamide group, sulfone group and the like are introduced into the diaphragm, and the high-temperature resistance, the oxidation resistance and the strength retention rate of the diaphragm are improved under the synergistic effect; firstly, 2,3,5, 6-tetrafluoroterephthalic acid and 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane are prepared into a fabric raw material poly 2,3,5, 6-tetrafluoroterephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide through amidation polycondensation reaction, and phosphorus pentoxide is added, so that the poly 2,3,5, 6-tetrafluoroterephthalic acid can be used as a reinforcing agent to improve the mechanical property of a membrane, and can perform chemical crosslinking reaction (the sulfonic acid group reacts with a benzene ring) with sulfonic acid groups on a zwitterionic 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate to form a three-dimensional network structure and improve the comprehensive performance.
(4) According to the high-hydrophilicity diaphragm for electrolyzed water, the amphoteric ion type 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate is introduced into the diaphragm, the hydrophilicity of the surface of the diaphragm is effectively improved by more hydrophilic groups and ionic groups on the molecular chain of the amphoteric ion type 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate, ions can pass through the diaphragm, the full wetting of electrolyte is facilitated, in addition, due to the amphoteric structure, the anions and the cations can pass through the diaphragm, the acidic water and the alkaline water can be simultaneously generated in the electrolyzed water process, and the quality of the obtained electrolyzed water reaches the standard.
Detailed Description
In order to make the technical solutions of the present invention better understood and make the above features, objects, and advantages of the present invention more comprehensible, the present invention is further described with reference to the following examples. The examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.
The raw materials used in the following examples of the present invention were all purchased commercially.
Example 1
A high-hydrophilicity diaphragm for electrolyzed water comprises a fabric and a coating layer coated on the fabric, wherein the fabric is prepared from 2,3,5, 6-tetrafluoro terephthalic acid, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide and phosphorus pentoxide according to the mass ratio of 100: 0.3; the coating is made of a zwitterionic 2, 5-diaminobenzenesulphonic acid/bisphenol a diglycidyl ether polycondensate; the fabric is also added with a coupling agent, and the mass of the coupling agent is 0.2 times of that of phosphorus pentoxide; the coupling agent is a silane coupling agent KH 550.
The preparation method of the poly 2,3,5, 6-tetrafluoroterephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide comprises the following steps: adding 1kg of 2,3,5, 6-tetrafluoroterephthalic acid, 1.72kg of 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane, 0.3kg of thiophosphonate and 0.3kg of zeolite into 10kg of dimethyl sulfoxide, stirring for 20 minutes to obtain a mixed material, transferring the mixed material into a high-pressure reaction kettle, replacing the air in the kettle with nitrogen, keeping the temperature and the pressure in the high-pressure reaction kettle at 265 ℃ and 1.2MPa, stirring for reaction for 4 hours, slowly exhausting gas within 1 hour and reducing the pressure to 0.8MPa, simultaneously raising the temperature in the high-pressure reaction kettle to 290 ℃, stirring for reaction for 1 hour, finally controlling the temperature between 230 ℃ under a vacuum condition, stirring for reaction for 13 hours, cooling to room temperature, precipitating in water, washing a precipitated product for 3 times with ethanol, then drying in a vacuum drying box at 80 ℃ to constant weight, to obtain the poly 2,3,5, 6-tetrafluoroterephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide.
The preparation method of the zwitterionic 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate comprises the following steps: adding 2, 5-diaminobenzene sulfonic acid, bisphenol A diglycidyl ether and sodium hydroxide into N-methylpyrrolidone, stirring and reacting for 3 hours at 70 ℃, then adding hydrochloric acid with the mass percentage concentration of 5%, adjusting the pH to 6, then adding 2-chloroethyl 4-fluorophenyl sulfone, continuing stirring and reacting for 5 hours, then precipitating in water, washing the product for 3 times by using ethanol, and then placing in a vacuum drying oven for drying to constant weight at 80 ℃ to obtain the amphoteric ion type 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate; the molar ratio of the 2, 5-diaminobenzene sulfonic acid, the bisphenol A diglycidyl ether, the sodium hydroxide, the N-methylpyrrolidone and the 2-chloroethyl 4-fluorophenyl sulfone is 1:1:0.4:6: 2.
A preparation method of the high-hydrophilicity diaphragm for electrolyzed water comprises the following steps:
step S1, mixing poly 2,3,5, 6-tetrafluoro terephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide, phosphorus pentoxide and a coupling agent in proportion, extruding and granulating, and then performing melt spinning to obtain the fabric fiber;
step S2, mixing the textile fiber prepared in the step S1 by a cotton mixer, carding into strips, and spinning into yarns; then making the yarns into a fabric through a loom; the yarn is 15 English counts, and the fabric is a plain weave fabric;
and S3, dissolving the zwitterionic 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate in N, N-dimethylformamide to form a solution with the mass fraction of 40%, spraying the obtained solution on the surface of the fabric prepared in the S2, and drying at 190 ℃ to constant weight to obtain a finished product.
Example 2
A high-hydrophilicity diaphragm for electrolyzed water comprises a fabric and a coating layer coated on the fabric, wherein the fabric is prepared from 2,3,5, 6-tetrafluoro terephthalic acid, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide and phosphorus pentoxide according to the mass ratio of 100: 0.35; the coating is made of a zwitterionic 2, 5-diaminobenzenesulphonic acid/bisphenol a diglycidyl ether polycondensate; the fabric is also added with a coupling agent, and the mass of the coupling agent is 0.3 times of that of phosphorus pentoxide; the coupling agent is a silane coupling agent KH 560.
The preparation method of the poly 2,3,5, 6-tetrafluoroterephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide comprises the following steps: adding 1kg of 2,3,5, 6-tetrafluoroterephthalic acid, 1.72kg of 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane, 0.35kg of phosphorous acid and 0.3kg of zeolite into 12kg of N, N-dimethylformamide, stirring for 23 minutes to obtain a mixed material, transferring the mixed material into a high-pressure reaction kettle, replacing air in the kettle with helium, keeping the temperature and the pressure in the high-pressure reaction kettle at 270 ℃ and 1.5MPa, stirring for reaction for 4.5 hours, slowly exhausting air and reducing the pressure to 0.9MPa within 1.2 hours, simultaneously raising the temperature in the high-pressure reaction kettle to 293 ℃, stirring for reaction for 1.2 hours, finally controlling the temperature to be 235 ℃ under a vacuum condition, stirring for reaction for 15 hours, cooling to room temperature, precipitating in water, washing the precipitated product with ethanol for 4 times, then placing in a vacuum drying oven to 83 ℃ and drying to constant weight, to obtain the poly 2,3,5, 6-tetrafluoroterephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide.
The preparation method of the zwitterionic 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate comprises the following steps: adding 2, 5-diaminobenzene sulfonic acid, bisphenol A diglycidyl ether and potassium hydroxide into N-methylpyrrolidone, stirring and reacting for 3.5 hours at 72 ℃, then adding hydrochloric acid with the mass percentage concentration of 6%, adjusting the pH to 6.5, then adding 2-chloroethyl 4-fluorophenyl sulfone, continuing stirring and reacting for 6 hours, then precipitating in water, washing the product for 4 times by using ethanol, and then placing in a vacuum drying oven at 82 ℃ for drying to constant weight to obtain the zwitterionic 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate; the molar ratio of the 2, 5-diaminobenzene sulfonic acid, the bisphenol A diglycidyl ether, the potassium hydroxide, the N-methylpyrrolidone and the 2-chloroethyl 4-fluorophenyl sulfone is 1:1:0.45:7: 2.
A preparation method of the high-hydrophilicity diaphragm for electrolyzed water comprises the following steps:
step S1, mixing poly 2,3,5, 6-tetrafluoro terephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide, phosphorus pentoxide and a coupling agent in proportion, extruding and granulating, and then performing melt spinning to obtain the fabric fiber;
step S2, mixing the textile fiber prepared in the step S1 by a cotton mixer, carding into strips, and spinning into yarns; then making the yarns into a fabric through a loom; the yarn is 25 English counts, and the fabric is twill fabric;
and S3, dissolving the zwitterionic 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate in N, N-dimethylformamide to form a solution with the mass fraction of 45%, spraying the obtained solution on the surface of the fabric prepared in the S2, and drying at 200 ℃ to constant weight to obtain a finished product.
Example 3
A high-hydrophilicity diaphragm for electrolyzed water comprises a fabric and a coating layer coated on the fabric, wherein the fabric is prepared from 2,3,5, 6-tetrafluoro terephthalic acid, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide and phosphorus pentoxide according to the mass ratio of 100: 0.4; the coating is made of a zwitterionic 2, 5-diaminobenzenesulphonic acid/bisphenol a diglycidyl ether polycondensate; the fabric is also added with a coupling agent, and the mass of the coupling agent is 0.4 times of that of phosphorus pentoxide; the coupling agent is a silane coupling agent KH 570.
The preparation method of the poly 2,3,5, 6-tetrafluoroterephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide comprises the following steps: adding 1kg of 2,3,5, 6-tetrafluoroterephthalic acid, 1.72kg of 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane, 0.4kg of thiophosphoryl amide and 0.3kg of zeolite into 15kg of N, N-dimethylacetamide, stirring for 25 minutes to obtain a mixed material, transferring the mixed material into a high-pressure reaction kettle, replacing air in the kettle with neon, keeping the temperature in the high-pressure reaction kettle at 275 ℃ and the pressure at 1.7MPa, stirring for 5 hours, slowly exhausting air and reducing the pressure to 1MPa within 1.5 hours, simultaneously raising the temperature in the high-pressure reaction kettle to 295 ℃, stirring for 1.5 hours, finally controlling the temperature to 240 ℃ under a vacuum condition, stirring for 15 hours, cooling to room temperature, precipitating in water, washing the precipitated product for 5 times with ethanol, drying at 85 ℃ in a vacuum drying oven to constant weight, to obtain the poly 2,3,5, 6-tetrafluoroterephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide.
The preparation method of the zwitterionic 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate comprises the following steps: adding 2, 5-diaminobenzene sulfonic acid, bisphenol A diglycidyl ether and sodium carbonate into N-methylpyrrolidone, stirring and reacting for 4 hours at 75 ℃, then adding hydrochloric acid with the mass percentage concentration of 8%, adjusting the pH to 7, then adding 2-chloroethyl 4-fluorophenyl sulfone, continuing stirring and reacting for 7 hours, then precipitating in water, washing the product for 4 times by using ethanol, and then placing in a vacuum drying oven for drying to constant weight at 85 ℃ to obtain the zwitterionic 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate; the molar ratio of the 2, 5-diaminobenzene sulfonic acid to the bisphenol A diglycidyl ether to the sodium carbonate to the N-methylpyrrolidone to the 2-chloroethyl 4-fluorophenyl sulfone is 1:1:0.5:8: 2.
A preparation method of the high-hydrophilicity diaphragm for electrolyzed water comprises the following steps:
step S1, mixing poly 2,3,5, 6-tetrafluoro terephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide, phosphorus pentoxide and a coupling agent in proportion, extruding and granulating, and then performing melt spinning to obtain the fabric fiber;
step S2, mixing the textile fiber prepared in the step S1 by a cotton mixer, carding into strips, and spinning into yarns; then making the yarns into a fabric through a loom; the yarn is 35 English counts, and the fabric is satin weave fabric.
And S3, dissolving the zwitterionic 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate in N, N-dimethylformamide to form a solution with the mass fraction of 50%, spraying the obtained solution on the surface of the fabric prepared in the S2, and drying at 210 ℃ to constant weight to obtain a finished product.
Example 4
A high-hydrophilicity diaphragm for electrolyzed water comprises a fabric and a coating layer coated on the fabric, wherein the fabric is prepared from 2,3,5, 6-tetrafluoro terephthalic acid, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide and phosphorus pentoxide according to the mass ratio of 100: 0.45; the coating is made of a zwitterionic 2, 5-diaminobenzenesulphonic acid/bisphenol a diglycidyl ether polycondensate; the fabric is also added with a coupling agent, and the mass of the coupling agent is 0.45 times that of phosphorus pentoxide; the coupling agent is a silane coupling agent KH 570.
The preparation method of the poly 2,3,5, 6-tetrafluoroterephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide comprises the following steps: adding 1kg of 2,3,5, 6-tetrafluoroterephthalic acid, 1.72kg of 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane, 0.48kg of catalyst and 0.3kg of zeolite into 17kg of high boiling point solvent, stirring for 28 minutes to obtain a mixed material, transferring the mixed material into a high-pressure reaction kettle, replacing air in the kettle with argon, keeping the temperature and the pressure in the high-pressure reaction kettle at 280 ℃ and 1.9MPa, stirring for reaction for 5.7 hours, slowly exhausting gas and reducing the pressure to 1.1MPa within 1.9 hours, simultaneously heating the temperature in the high-pressure reaction kettle to 298 ℃, stirring for reaction for 1.9 hours, finally controlling the temperature to be 248 ℃ under the vacuum condition, stirring for reaction for 17 hours, cooling to room temperature, precipitating in water, washing the precipitated product with ethanol for 5 times, placing in a vacuum drying box for drying to 88 ℃ to constant weight to obtain poly 2,3,5, 6-tetrafluoroterephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propanamide; the high-boiling-point solvent is formed by mixing dimethyl sulfoxide, N-dimethylformamide, N-dimethylacetamide and N-methylpyrrolidone according to a mass ratio of 1:1:3: 2; the catalyst is prepared by mixing thiophosphonate, phosphorous acid and thiophosphoryl amide according to the mass ratio of 1:2: 3.
The preparation method of the zwitterionic 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate comprises the following steps: adding 2, 5-diaminobenzene sulfonic acid, bisphenol A diglycidyl ether and an alkaline catalyst into N-methylpyrrolidone, stirring and reacting for 4.5 hours at 78 ℃, then adding hydrochloric acid with the mass percentage concentration of 9%, adjusting the pH to 7.5, then adding 2-chloroethyl 4-fluorophenyl sulfone, continuing stirring and reacting for 7.5 hours, then precipitating in water, washing the product for 4 times by using ethanol, and then placing the product in a vacuum drying oven for drying to constant weight at 88 ℃ to obtain the zwitterionic 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate; the molar ratio of the 2, 5-diaminobenzene sulfonic acid to the bisphenol A diglycidyl ether to the alkaline catalyst to the N-methylpyrrolidone to the 2-chloroethyl 4-fluorophenyl sulfone is 1:1:0.58:9: 2; the alkaline catalyst is prepared by mixing sodium hydroxide, potassium hydroxide, sodium carbonate and potassium carbonate according to the mass ratio of 1:2:2: 1.
A preparation method of the high-hydrophilicity diaphragm for electrolyzed water comprises the following steps:
step S1, mixing poly 2,3,5, 6-tetrafluoro terephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide, phosphorus pentoxide and a coupling agent in proportion, extruding and granulating, and then performing melt spinning to obtain the fabric fiber;
step S2, mixing the textile fiber prepared in the step S1 by a cotton mixer, carding into strips, and spinning into yarns; then making the yarns into a fabric through a loom; the yarn is 40 English counts, and the fabric is a plain weave fabric;
and S3, dissolving the zwitterionic 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate in N, N-dimethylformamide to form a solution with the mass fraction of 58%, spraying the obtained solution on the surface of the fabric prepared in the S2, and drying at 220 ℃ to constant weight to obtain a finished product.
Example 5
A high-hydrophilicity diaphragm for electrolyzed water comprises a fabric and a coating layer coated on the fabric, wherein the fabric is prepared from 2,3,5, 6-tetrafluoro terephthalic acid, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide and phosphorus pentoxide according to the mass ratio of 100: 0.5; the coating is made of a zwitterionic 2, 5-diaminobenzenesulphonic acid/bisphenol a diglycidyl ether polycondensate; the fabric is also added with a coupling agent, and the mass of the coupling agent is 0.5 times of that of phosphorus pentoxide; the coupling agent is prepared by mixing a silane coupling agent KH550, a silane coupling agent KH560 and a silane coupling agent KH570 according to the mass ratio of 1:3: 5.
The preparation method of the poly 2,3,5, 6-tetrafluoroterephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide comprises the following steps: adding 1kg of 2,3,5, 6-tetrafluoroterephthalic acid, 1.72kg of 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane, 0.5kg of thiophosphonate and 0.3kg of zeolite into 18kg of N-methylpyrrolidone, stirring for 30 minutes to obtain a mixed material, transferring the mixed material into a high-pressure reaction kettle, replacing air in the kettle with nitrogen, keeping the temperature in the high-pressure reaction kettle at 285 ℃ and the pressure at 2.0MPa, stirring for reaction for 6 hours, slowly exhausting gas within 2 hours to reduce the pressure to 1.2MPa, simultaneously raising the temperature in the high-pressure reaction kettle to 300 ℃, stirring for reaction for 2 hours, finally controlling the temperature to be between 250 ℃ under a vacuum condition, stirring for reaction for 18 hours, cooling to room temperature, precipitating in water, washing a precipitated product for 6 times with ethanol, placing the washed product in a vacuum drying oven at 90 ℃ and drying to constant weight, to obtain the poly 2,3,5, 6-tetrafluoroterephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide.
The preparation method of the zwitterionic 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate comprises the following steps: adding 2, 5-diaminobenzene sulfonic acid, bisphenol A diglycidyl ether and potassium carbonate into N-methylpyrrolidone, stirring and reacting for 5 hours at 80 ℃, then adding hydrochloric acid with the mass percentage concentration of 10%, adjusting the pH to 8, then adding 2-chloroethyl 4-fluorophenyl sulfone, continuing stirring and reacting for 8 hours, then precipitating in water, washing the product for 5 times by using ethanol, and then placing in a vacuum drying oven for drying at 90 ℃ to constant weight to obtain the zwitterionic 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate; the molar ratio of the 2, 5-diaminobenzene sulfonic acid, the bisphenol A diglycidyl ether, the potassium carbonate, the N-methylpyrrolidone and the 2-chloroethyl 4-fluorophenyl sulfone is 1:1:0.6:10: 2.
A preparation method of the high-hydrophilicity diaphragm for electrolyzed water comprises the following steps:
step S1, mixing poly 2,3,5, 6-tetrafluoro terephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide, phosphorus pentoxide and a coupling agent in proportion, extruding and granulating, and then performing melt spinning to obtain the fabric fiber;
step S2, mixing the textile fiber prepared in the step S1 by a cotton mixer, carding into strips, and spinning into yarns; then making the yarns into a fabric through a loom; the yarn is 45 English, and the fabric is a plain weave fabric;
and S3, dissolving the zwitterionic 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate in N, N-dimethylformamide to form a solution with the mass fraction of 60%, spraying the obtained solution on the surface of the fabric prepared in the S2, and drying at 230 ℃ to constant weight to obtain a finished product.
Comparative example
This example provides a commercially available polyphenylene sulfide separator.
To further illustrate the beneficial technical effects of the embodiments of the present invention, the heat resistance of the separator was evaluated by a rapid aging test at high temperature. The separator samples of examples 1 to 5 and comparative example were subjected to the following tests:
(1) testing the tensile strength of the textile by using a GB/T3923.1 (test strip method for testing the breaking strength and the fracture elongation of part 1 of the tensile property of textile fabric), then placing the diaphragms in a hot air oven at 220 ℃ for a rapid thermal aging test, wherein the test time lasts for 240 hours, after the thermal aging is finished, testing the tensile strength of the diaphragm by using a GB/T3923.1 method again, wherein the tensile strength of the diaphragm is reduced after the thermal aging, and if the strength retention rate of the diaphragm after the thermal treatment is high, the electrolytic diaphragm has good heat resistance; the strength retention (%) is the fabric strength after heat treatment (N)/the fabric strength before heat treatment (N).
(2) Working under the hydrogen electrolysis working conditions of 93 ℃, 30% of potassium hydroxide in electrolyte, 3V of direct current voltage and 750A of direct current, and observing that the various diaphragms meet the condition that bubbles cannot permeate (no bubbles can be generated under the pressure of a 300 mm water column); can be wetted by the electrolyte, so that ions in the solution can smoothly pass through; sufficient mechanical strength (greater than 50N); the electrolyte can continuously work under the conditions that the electrolyte is not corroded by alkali liquor (the alkali loss is less than 2 percent) and the like.
TABLE 1
| Item | Retention of membrane strength at 220 ℃ for 240 hours | Duration in electrolytic cell |
| Unit of | ％ | Sky |
| Example 1 | 93 | 770 |
| Example 2 | 95 | 775 |
| Example 3 | 96 | 781 |
| Example 4 | 98 | 785 |
| Example 5 | 99 | 789 |
| Comparative example | 30 | 165 |
As can be seen from table 1, the highly hydrophilic separator for electrolytic water disclosed in the examples of the present invention has more excellent heat resistance and performance stability; this is a result of the synergistic effect of the film layer structures.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The high-hydrophilicity diaphragm for electrolyzed water is characterized by comprising a fabric and a coating layer coated on the fabric, wherein the fabric is prepared from 2,3,5, 6-tetrafluoro terephthalic acid, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide and phosphorus pentoxide according to the mass ratio of 100 (0.3-0.5); the coating is made of a zwitterionic 2, 5-diaminobenzenesulphonic acid/bisphenol a diglycidyl ether polycondensate.
2. The highly hydrophilic electrolyzed water separator according to claim 1, wherein a coupling agent is further added to the fabric, and the mass of the coupling agent is 0.2 to 0.5 times the mass of the phosphorus pentoxide.
3. The highly hydrophilic electrolyzed water separator according to claim 2, wherein the coupling agent is at least one of a silane coupling agent KH550, a silane coupling agent KH560, and a silane coupling agent KH 570.
4. The separator for highly hydrophilic electrolytic water according to claim 1, wherein the method for preparing 2, 2-bis [4- (4-aminophenoxy) phenyl ] propanamide, poly (2, 3,5, 6-tetrafluoroterephthalic acid), comprises the steps of:
(1) adding 2,3,5, 6-tetrafluoroterephthalic acid, 2-bis [4- (4-aminophenoxy) phenyl ] propane, a catalyst and zeolite into a high-boiling-point solvent, and stirring for 20-30 minutes to obtain a mixed material;
(2) then transferring the mixed material into a high-pressure reaction kettle, replacing the air in the kettle with nitrogen or inert gas, keeping the temperature in the high-pressure reaction kettle at 265-285 ℃ and the pressure at 1.2-2.0MPa, stirring and reacting for 4-6h, then slowly exhausting gas and reducing the pressure to 0.8-1.2MPa within 1-2 h, simultaneously heating the temperature in the high-pressure reaction kettle to 290-300 ℃, and stirring and reacting for 1-2 h;
(3) and finally, under the vacuum condition, controlling the temperature between 230 ℃ and 250 ℃, stirring for reaction for 13-18h, cooling to room temperature, precipitating in water, washing the precipitated product with ethanol for 3-6 times, and then placing the product in a vacuum drying oven at 80-90 ℃ for drying to constant weight to obtain the poly 2,3,5, 6-tetrafluoro terephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide.
5. The highly hydrophilic electrolytic water separator according to claim 4, wherein the mass ratio of 2,3,5, 6-tetrafluoroterephthalic acid, 2-bis [4- (4-aminophenoxy) phenyl ] propane, the catalyst, the zeolite and the high-boiling solvent is 1:1.72 (0.3-0.5) to 0.3 (10-18).
6. The separator for highly hydrophilic electrolyzed water according to claim 4, wherein the high boiling point solvent is at least one of dimethylsulfoxide, N-dimethylformamide, N-dimethylacetamide, and N-methylpyrrolidone; the inert gas is one of helium, neon and argon; the catalyst is at least one of thiophosphonate, phosphorous acid and thiophosphoryl amide.
7. The separator for highly hydrophilic electrolyzed water according to claim 1, wherein the method for preparing the zwitterionic 2, 5-diaminobenzenesulfonic acid/bisphenol a diglycidyl ether polycondensate comprises the following steps: adding 2, 5-diaminobenzene sulfonic acid, bisphenol A diglycidyl ether and an alkaline catalyst into N-methylpyrrolidone, stirring and reacting for 3-5 hours at 70-80 ℃, then adding hydrochloric acid with the mass percentage concentration of 5-10%, adjusting the pH to 6-8, then adding 2-chloroethyl 4-fluorophenyl sulfone, continuing stirring and reacting for 5-8 hours, then precipitating in water, washing the product for 3-5 times by using ethanol, and then placing in a vacuum drying oven for drying to constant weight at 80-90 ℃ to obtain the amphoteric 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate.
8. The highly hydrophilic electrolytic water separator as claimed in claim 7, wherein the molar ratio of 2, 5-diaminobenzenesulfonic acid, bisphenol A diglycidyl ether, basic catalyst, N-methylpyrrolidone, and 2-chloroethyl 4-fluorophenylsulfone is 1:1 (0.4-0.6) to (6-10) 2.
9. The membrane for highly hydrophilic electrolyzed water according to claim 7, wherein the basic catalyst is at least one of sodium hydroxide, potassium hydroxide, sodium carbonate, and potassium carbonate.
10. The separator for highly hydrophilic electrolyzed water according to any one of claims 1 to 9, wherein the method for producing the separator for highly hydrophilic electrolyzed water comprises the steps of:
step S1, mixing poly 2,3,5, 6-tetrafluoro terephthalic acid 2, 2-bis [4- (4-aminophenoxy) phenyl ] propane amide, phosphorus pentoxide and a coupling agent in proportion, extruding and granulating, and then performing melt spinning to obtain the fabric fiber;
step S2, mixing the textile fiber prepared in the step S1 by a cotton mixer, carding into strips, and spinning into yarns; then making the yarns into a fabric through a loom; the yarn is 15-45 English, and the fabric is one of plain weave fabric, twill fabric and satin fabric;
and S3, dissolving the zwitterionic 2, 5-diaminobenzene sulfonic acid/bisphenol A diglycidyl ether polycondensate in N, N-dimethylformamide to form a solution with the mass fraction of 40-60%, spraying the obtained solution on the surface of the fabric prepared in the S2, and drying at the temperature of 190-230 ℃ to constant weight to obtain a finished product.
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Application publication date: 20200410 |