CN115125582A - Preparation method of organic-inorganic composite membrane in alkaline electrolysis device - Google Patents
Preparation method of organic-inorganic composite membrane in alkaline electrolysis device Download PDFInfo
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- 239000012528 membrane Substances 0.000 title claims abstract description 28
- 239000002131 composite material Substances 0.000 title claims abstract description 23
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229920000642 polymer Polymers 0.000 claims abstract description 26
- 239000010954 inorganic particle Substances 0.000 claims abstract description 19
- 150000004679 hydroxides Chemical class 0.000 claims abstract description 7
- 238000002791 soaking Methods 0.000 claims description 28
- 239000008367 deionised water Substances 0.000 claims description 16
- 229910021641 deionized water Inorganic materials 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 13
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 12
- 239000000945 filler Substances 0.000 claims description 12
- 229910021645 metal ion Inorganic materials 0.000 claims description 12
- 238000005266 casting Methods 0.000 claims description 10
- 239000011521 glass Substances 0.000 claims description 10
- 239000003960 organic solvent Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- -1 polytetrafluoroethylene Polymers 0.000 claims description 9
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 7
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 6
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 6
- 230000008023 solidification Effects 0.000 claims description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 5
- 238000007790 scraping Methods 0.000 claims description 5
- 239000004695 Polyether sulfone Substances 0.000 claims description 4
- 229920006393 polyether sulfone Polymers 0.000 claims description 4
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 229920000491 Polyphenylsulfone Polymers 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims description 3
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 229920002492 poly(sulfone) Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 239000011256 inorganic filler Substances 0.000 abstract description 4
- 229910003475 inorganic filler Inorganic materials 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000007654 immersion Methods 0.000 abstract description 3
- 239000003792 electrolyte Substances 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 abstract description 2
- 238000000614 phase inversion technique Methods 0.000 abstract description 2
- 229910003471 inorganic composite material Inorganic materials 0.000 abstract 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 23
- 229910052739 hydrogen Inorganic materials 0.000 description 23
- 239000001257 hydrogen Substances 0.000 description 23
- 238000004519 manufacturing process Methods 0.000 description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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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
-
- 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
-
- 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
-
- 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
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
- C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
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Abstract
The invention discloses a preparation method of an organic-inorganic composite membrane in an alkaline electrolysis device. The invention introduces inorganic particles and Layered Double Hydroxides (LDH) as inorganic fillers into a polymer matrix at the same time, and adopts a solution immersion phase inversion method to prepare the organic-inorganic composite membrane. The existence of the inorganic particles can improve the hydrophilic property of the diaphragm, promote the conduction of electrolyte in the cathode and the anode, and reduce the resistance of the diaphragm; the introduction of LDH can further improve the hydrophilic performance of the membrane, and simultaneously, the LDH has better intrinsic OH － And the conductivity is favorable for further reducing the resistance of the diaphragm. The preparation method provided by the invention can obtain the organic-inorganic composite material with lower resistanceThe membrane combination has important significance for reducing the system energy consumption of the alkaline water electrolyzer.
Description
Technical Field
The invention relates to the technical field of hydrogen production by water electrolysis, in particular to a preparation method of an organic-inorganic composite membrane in an alkaline electrolysis device.
Background
In recent years, hydrogen energy has received much attention worldwide with the transition of national energy strategy. Compared with the traditional energy, the hydrogen has the advantages of high heat value, wide source, reproducibility, cleanness, low carbon and the like. Most hydrogen in industrial application is mainly obtained by the traditional fossil energy hydrogen production method, such as coal hydrogen production method and natural gas hydrogen production method, but the production processes generate a large amount of greenhouse gases, only "ash hydrogen" or "blue hydrogen" can be obtained, and the aim of "double carbon" is difficult to achieve, so that the application of the hydrogen is increasingly limited.
The method for producing hydrogen by electrolyzing water by utilizing clean energy such as photovoltaic energy, wind energy and the like to generate electricity is a great trend of energy transformation and is one of important paths for realizing the aim of double carbon. The water electrolysis hydrogen production mainly comprises alkaline water electrolysis hydrogen production, proton exchange membrane water electrolysis hydrogen production, solid oxide water electrolysis hydrogen production and anion membrane water electrolysis hydrogen production. Wherein, the alkaline water electrolysis hydrogen production cost is lower, the technology is mature, and the technology is the water electrolysis hydrogen production technology with the highest commercialization degree at present. However, the hydrogen production cost of the current alkaline water electrolysis hydrogen production electrolytic cell is obviously higher than that of hydrogen production by fossil energy, and the higher cost is one of the important problems which restrict the further popularization and application of the electrolytic cell and need to be solved urgently. The cost of hydrogen production from water electrolysis generally includes: equipment costs, energy costs, raw material costs, and other operating costs. Wherein the energy cost accounts for the largest proportion, and is generally 40 to 60 percent. Therefore, reducing the energy consumption of the system is one of the important ways to reduce the cost of the electrolyzer. Most of diaphragms used in industrial application are polyphenylene sulfide braided fabrics, and the polyphenylene sulfide braided fabrics are poor in hydrophilic performance and large in resistance, so that the system consumes large energy. Therefore, the development of a low resistance diaphragm is important for reducing the system power consumption of an alkaline water electrolyzer.
Disclosure of Invention
The present invention is directed to solving, at least in part, one of the technical problems in the related art.
Therefore, the invention aims to provide a preparation method of an organic-inorganic composite membrane in an alkaline electrolysis device.
The invention provides a preparation method of an organic-inorganic composite membrane in an alkaline electrolysis device, which comprises the following steps:
(1) dissolving a polymer in an organic solvent to obtain a polymer solution;
(2) adding a filler containing inorganic particles and layered double hydroxides into the polymer solution, and uniformly mixing to obtain a membrane casting solution;
(3) scraping the film on a glass substrate by using the film casting solution to obtain a liquid film, and pre-evaporating the liquid film in the air for 5-60s, preferably for 5s, 10s, 15s, 20s, 25s, 30s, 35s, 40s, 45s, 60 s;
(4) immersing the liquid film into deionized water at the temperature of 5-90 ℃ to induce solidification, and separating the liquid film from the glass substrate after 2-10min, wherein the induced solidification time is preferably 2min, 5min, 8min and 10 min;
(5) soaking the substrate in deionized water for several times, and drying to obtain the organic-inorganic composite film with the thickness of 100-800 mu m.
In some embodiments, the inorganic particles have a particle size in the range of 10 to 200 nm.
In some embodiments, the inorganic particles are one or more of zirconium dioxide, cerium dioxide, titanium dioxide, and barium sulfate.
In some embodiments, the mass fraction of the layered double hydroxide in the filler is 1% to 50%, preferably the mass fraction of the layered double hydroxide is 1%, 3%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%.
In some embodiments, the layered double hydroxide comprises divalent metal ions and trivalent metal ions, the divalent metal ions being Mg 2+ 、Zn 2+ 、Ni 2+ 、Ca 2+ One or more of the trivalent metal ions are Al 3+ 、Fe 3 + 、Mn 3+ 、Cr 3+ One or more of them.
In some embodiments, the polymer is one or more of polysulfone, polyethersulfone, polyphenylene sulfide, polytetrafluoroethylene, polyphenylsulfone, polypropylene, polyethylene.
In some embodiments, the organic solvent is one or more of N-methyl pyrrolidone, dimethyl sulfoxide, dimethylformamide, and dimethylacetamide.
In some embodiments, the mass fraction of the polymer in the organic-inorganic composite film is 10% to 60%.
In some embodiments, the number of times of soaking in deionized water in step (5) is 2-5, wherein the first soaking time is 2-10min, and the rest times except for the first soaking time are 10-120 min.
In some embodiments, the drying in step (5) is at 25 ℃ to 80 ℃ for 0.5 to 24 hours.
Compared with the prior art, the invention has the beneficial effects that:
the organic-inorganic composite membrane is prepared by introducing inorganic particles and Layered Double Hydroxides (LDH) as inorganic fillers into a polymer matrix and adopting a solution immersion phase conversion method. The existence of the inorganic particles can improve the hydrophilic performance of the diaphragm, promote the conduction of the electrolyte in the anode and the cathode, and reduce the resistance of the diaphragm; the introduction of LDH can further improve the barrierThe hydrophilic property of the membrane, and simultaneously, the LDH has better intrinsic OH － And the conductivity is favorable for further reducing the resistance of the diaphragm. The preparation method provided by the invention can obtain the organic-inorganic composite membrane with smaller resistance, and has important significance for reducing the system energy consumption of the alkaline water electrolyzer.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of a process for preparing an organic-inorganic composite film according to the present invention;
FIG. 2 is a schematic diagram of the process for preparing an organic-inorganic composite film according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A method for preparing an organic-inorganic composite membrane in an alkaline electrolysis apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1-2, in the method for preparing an organic-inorganic composite membrane in an alkaline electrolysis device according to the present invention, inorganic particles and Layered Double Hydroxides (LDHs) are sequentially added as fillers into a polymer solution, and then an organic-inorganic composite membrane is prepared by a solution immersion phase inversion method, wherein the specific preparation process comprises the following steps:
(1) dissolving a polymer in an organic solvent to obtain a polymer solution;
(2) adding a filler containing inorganic particles and layered double hydroxides into the polymer solution, and uniformly mixing to obtain a membrane casting solution;
(3) scraping the film on a glass substrate by using the film casting solution to obtain a liquid film, and pre-evaporating the liquid film in the air for 5-60 s;
(4) immersing the liquid film into deionized water at the temperature of 5-90 ℃ to induce solidification, and separating from the glass substrate after 2-10 min;
(5) soaking the substrate in deionized water for several times, and drying to obtain the organic-inorganic composite film with the thickness of 100-800 mu m.
In the step (1), the polymer is one or more of polysulfone, polyethersulfone, polyphenylene sulfide, polytetrafluoroethylene, polyphenylsulfone, polypropylene and polyethylene, and the organic solvent is one or more of N-methylpyrrolidone, dimethyl sulfoxide, dimethylformamide and dimethylacetamide.
In the step (2), the filler comprises inorganic particles and layered double hydroxides, the inorganic particles are one or more of zirconium dioxide, cerium dioxide, titanium dioxide and barium sulfate, and the particle size range of the inorganic particles is 10-200 nm; the mass fraction of Layered Double Hydroxide (LDH) in the filler is 1-50%, the layered double hydroxide contains divalent metal ions and trivalent metal ions, and the divalent metal ions are Mg 2+ 、Zn 2+ 、Ni 2+ 、Ca 2+ One or more of the trivalent metal ions are Al 3 + 、Fe 3+ 、Mn 3+ 、Cr 3+ One or more of them. The inorganic particles and LDH may be added in sequence by adding the inorganic particles first and then adding the LDH, by adding the LDH first and then adding the inorganic particles, or by adding the inorganic particles and the LDH at the same time.
In the step (5), soaking with deionized water for 2-5 times, wherein the first soaking time is 2-10min, and the soaking times except for the first soaking time are 10-120min, specifically, taking deionized water soaking times as an example, the first soaking time is 2-10min, the second soaking time is 10-120min, and the third soaking time is 10-120 min; the drying temperature is 25-80 ℃ and the drying time is 0.5-24 h; the mass fraction of the polymer in the prepared organic-inorganic membrane is 10-60%.
The organic-inorganic membrane prepared by the method can be applied to the hydrogen production process by alkaline electrolysis of water.
Example 1:
s1, dissolving polymer polyether sulfone in an organic solvent dimethyl sulfoxide to obtain a polymer solution;
s2, taking zirconia and MgAl-LDH as fillers, and adding inorganic fillers into the polymer solution in sequence, wherein the MgAl-LDH accounts for 3 percent of the total amount of the fillers, and fully stirring to uniformly disperse the MgAl-LDH to obtain a casting solution;
s3, performing film scraping on the glass substrate by using the film casting solution to obtain a liquid film, and pre-evaporating the liquid film in air for 15S;
s4, immersing the liquid film into deionized water at 15 ℃ to induce solidification, and separating from the glass substrate after 5 minutes;
and S5, soaking the organic-inorganic composite membrane for 3 times by using deionized water, drying the membrane for 4 hours at 50 ℃ to obtain the organic-inorganic composite membrane, wherein the mass fraction of a polymer in the organic-inorganic membrane is 20%, the first soaking time is 10min, the second soaking time is 40min, and the third soaking time is 60min, and the residual organic solvent is diffused into water by soaking the membrane by using the deionized water to achieve the aim of cleaning.
Example 2:
s1, dissolving polymer polyphenylene sulfide in an organic solvent dimethylformamide to obtain a polymer solution;
s2, taking cerium oxide and ZnAl-LDH as fillers, and adding inorganic fillers into the polymer solution in sequence, wherein the ZnAl-LDH accounts for 5 percent of the total amount of the fillers, and fully stirring to uniformly disperse the ZnAl-LDH to obtain a casting solution;
s3, performing film scraping on the glass substrate by using the film casting solution to obtain a liquid film, and pre-evaporating the liquid film in air for 15S;
s4, immersing the liquid film into deionized water at 15 ℃ to induce solidification, and separating from the glass substrate after 5 minutes;
and S5, soaking the film for 3 times in deionized water, drying the film for 3 hours at 60 ℃ to obtain the organic-inorganic composite film, wherein the mass fraction of a polymer in the film is 30%, the first soaking time is 10min, the second soaking time is 50min, and the third soaking time is 60min, and the residual organic solvent is diffused into water by soaking the film in deionized water to achieve the purpose of cleaning.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms may be directed to different embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A preparation method of an organic-inorganic composite membrane in an alkaline electrolysis device is characterized by comprising the following steps:
(1) dissolving a polymer in an organic solvent to obtain a polymer solution;
(2) adding a filler containing inorganic particles and layered double hydroxides into the polymer solution, and uniformly mixing to obtain a membrane casting solution;
(3) scraping the film on a glass substrate by using the film casting solution to obtain a liquid film, and pre-evaporating the liquid film in air for 5-60 s;
(4) immersing the liquid film into deionized water at the temperature of 5-90 ℃ to induce solidification, and separating from the glass substrate after 2-10 min;
(5) soaking the substrate in deionized water for several times, and drying to obtain the organic-inorganic composite film with the thickness of 100-800 mu m.
2. The method of claim 1, wherein the inorganic particles have a particle size in the range of 10 nm to 200 nm.
3. The method of claim 1, wherein the inorganic particles are one or more of zirconium dioxide, cerium dioxide, titanium dioxide, and barium sulfate.
4. The method of claim 1, wherein the layered double hydroxide is present in the filler in an amount of 1% to 50% by weight.
5. The method of claim 1, wherein the layered double hydroxide comprises divalent metal ions and trivalent metal ions, and wherein the divalent metal ions are Mg 2+ 、Zn 2+ 、Ni 2+ 、Ca 2+ One or more of the trivalent metal ions are Al 3+ 、Fe 3+ 、Mn 3+ 、Cr 3+ One or more of them.
6. The method of claim 1, wherein the polymer is one or more of polysulfone, polyethersulfone, polyphenylene sulfide, polytetrafluoroethylene, polyphenylsulfone, polypropylene, and polyethylene.
7. The method according to claim 1, wherein the organic solvent is one or more of N-methylpyrrolidone, dimethyl sulfoxide, dimethylformamide and dimethylacetamide.
8. The method according to claim 1, wherein the mass fraction of the polymer in the organic-inorganic composite film is 10% to 60%.
9. The method of claim 1, wherein the number of times of soaking in deionized water in step (5) is 2-5, wherein the first soaking time is 2-10min, and the number of times of soaking other than the first soaking time is 10-120 min.
10. The method of claim 1, wherein the drying in step (5) is at 25 ℃ to 80 ℃ for 0.5 to 24 hours.
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| CN117604571A (en) * | 2024-01-18 | 2024-02-27 | 山东东岳高分子材料有限公司 | Porous composite membrane for hydrogen production by alkaline water electrolysis and preparation method thereof |
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| CN114432905A (en) * | 2022-02-13 | 2022-05-06 | 北京化工大学 | Non-asbestos alkaline electrolyzed water composite diaphragm and preparation method thereof |
| CN114432906A (en) * | 2022-02-13 | 2022-05-06 | 北京化工大学 | High-temperature-resistant alkaline water electrolysis tank composite diaphragm and preparation method thereof |
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| JP2020007574A (en) * | 2018-07-02 | 2020-01-16 | 株式会社日本触媒 | Inorganic-organic composite membrane, and diaphram for electrochemical element |
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| CN117604571B (en) * | 2024-01-18 | 2024-05-14 | 山东东岳高分子材料有限公司 | Porous composite membrane for hydrogen production by alkaline water electrolysis and preparation method thereof |
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