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A kind of silane cross-linked polyaryletherketone anion exchange membrane and preparation method thereof

An anion-exchange membrane and polyaryletherketone technology, which is applied in the field of silane-crosslinked polyaryletherketone anion-exchange membrane and its preparation, can solve the problems of high water absorption, membrane swelling and dissociation, and poor alkali resistance. Achieve high electrical conductivity, high tensile strength, and good dimensional stability

Active Publication Date: 2021-06-22
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The crosslinking methods currently used are as follows: crosslinking with dimethylammonium alkyl chains (such as N,N,N',N'-tetramethylhexamethylenediamine), nucleophilic reaction with brominated polyphenylene ether The substitution reaction forms a network structure, but the high water absorption of the prepared film is easy to cause the swelling and dissociation of the film; the epoxy group-containing siloxane and the polyaryletherketone side chain (brominated polyaryletherketone) are used to conduct the process in an alkaline environment. After hydroxylation treatment, the hydroxyl groups in the side chains containing hydroxyl groups undergo ring-opening condensation reactions, but the formed C-O-C bonds have poor alkali resistance and are easily oxidized by OH in an alkaline environment. - hydrolysis reaction

Method used

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  • A kind of silane cross-linked polyaryletherketone anion exchange membrane and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0035] A siloxane crosslinked polyaryletherketone anion exchange membrane, the preparation method steps are as follows:

[0036] 3.27g 4,4'-difluorobenzophenone (DFBP), 3.63g 3,3',5,5'-tetramethylbiphenyl-4,4'-diol (TMbP) and 3.30g Anhydrous K 2 CO 3 Add it into a three-necked flask filled with 20mL sulfolane, dissolve to obtain a homogeneous solution, and under the protection of nitrogen, raise the temperature of the obtained solution to 130°C, keep it warm for 4h, then raise the temperature to 180°C and heat until the solution becomes viscous, and the viscous solution Pour it into water, dry the obtained precipitate and crush it with a dry powder crusher to obtain a polymer powder, then add the polymer powder to deionized water and boil it, filter it with suction and place it in an oven at 100°C to dry for 24 hours to obtain a polyaryletherketone polymer powder .

[0037] Add 3.88g of the above-mentioned dried polyaryletherketone polymer powder, 1.78g of NBS and 0.24g of ...

Embodiment 2

[0040] A siloxane crosslinked polyaryletherketone anion exchange membrane, the preparation method steps are as follows:

[0041] 3.27g 4,4'-difluorobenzophenone (DFBP), 3.63g 3,3',5,5'-tetramethylbiphenyl-4,4'-diol (TMbP) and 3.30g Anhydrous K 2 CO 3 Add it into a three-necked flask filled with 20mL sulfolane, dissolve to obtain a homogeneous solution, and under the protection of nitrogen, raise the temperature of the obtained solution to 140°C, keep it warm for 6h, then heat up to 200°C until the solution becomes viscous, and the viscous solution Pour it into water, dry the obtained precipitate and crush it with a dry powder crusher to obtain a polymer powder, then add the polymer powder to deionized water and boil it, filter it with suction and place it in an oven at 100°C to dry for 24 hours to obtain a polyaryletherketone polymer powder .

[0042] Add 3.88g of the above-mentioned dried polyaryletherketone polymer powder, 1.78g of NBS and 0.24g of BPO into a three-necked...

Embodiment 3

[0045] A siloxane crosslinked polyaryletherketone anion exchange membrane, the preparation method steps are as follows:

[0046] 3.27g 4,4'-difluorobenzophenone (DFBP), 3.63g 3,3',5,5'-tetramethylbiphenyl-4,4'-diol (TMbP) and 3.30g Anhydrous K 2 CO 3 Add it into a three-necked flask filled with 20mL sulfolane, dissolve to obtain a homogeneous solution, and under the protection of nitrogen, raise the temperature of the obtained solution to 150°C, keep it warm for 4h, then heat up to 180°C until the solution becomes viscous, and the viscous solution Pour it into water, dry the obtained precipitate and crush it with a dry powder crusher to obtain a polymer powder, then add the polymer powder to deionized water and boil it, filter it with suction and place it in an oven at 80°C to dry for 36 hours to obtain a polyaryletherketone polymer powder .

[0047] Add 3.88g of the above-mentioned dried polyaryletherketone polymer powder, 1.78g of NBS and 0.24g of BPO into a three-necked ...

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Abstract

The invention relates to a silane crosslinked polyaryletherketone anion exchange membrane and a preparation method thereof. The preparation method is as follows: 1) preparing polyaryletherketone polymer powder; 2) mixing polyaryletherketone polymer powder with N-bromo Succinimide and benzoyl peroxide were dissolved in chloroform, heated to reflux under nitrogen for 12-24h, and then the reaction solution was poured into acetone for cleaning to obtain brominated polyaryletherketone; 3) brominated polyaryletherketone Dissolve in N,N-dimethylacetamide to obtain brominated polyaryletherketone solution, add 1-methylimidazole for substitution reaction to obtain prepolymer solution, then add 3-(2-imidazole ‑1‑olyl)propyltriethoxysilane is used for crosslinking reaction, and a sol‑gel method is used to form a film to obtain a silane crosslinked polyaryletherketone anion exchange membrane. The anion exchange membrane obtained by the invention has high electrical conductivity, strong alkali resistance, low water absorption, good dimensional stability, high tensile strength and good comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and relates to a silane crosslinked polyaryletherketone anion exchange membrane and a preparation method thereof. Background technique [0002] Due to the sharp reduction in the storage of fossil energy and the serious environmental problems caused by its use, people have gradually paid attention to the development of clean and efficient fuel cells. Anion exchange membrane fuel cell is a new type of alkaline fuel cell. Under its working conditions, the oxidation rate of hydrogen and the reduction rate of oxygen are greatly improved, making it possible to use non-precious metals as electrodes, which greatly reduces the cost. ; Water is recycled during the use of the alkaline fuel cell, which avoids the problem of water accumulation in the battery and increases the service life of the battery. Anion exchange membrane fuel cells have broad research prospects by virtue of the above advantages. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/22H01M8/083C08G65/40
CPCC08G65/4012C08J5/2256C08J2371/10H01M8/083Y02E60/50
Inventor 沈春晖程向泽
Owner WUHAN UNIV OF TECH
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