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Long-chain branched poly(arylene ether nitrile) anion exchange membrane and preparation method thereof

A technology of anion exchange membrane and polyarylether nitrile, which is applied in the field of long-chain branched polyarylether nitrile anion exchange membrane and its preparation, can solve the problems of low hydroxide ion conductivity, poor membrane dimensional stability, and poor alkaline stability. Advanced problems, achieve a wide range of solvent selection, promote microphase separation, and simple reaction steps

Active Publication Date: 2019-07-23
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] As the core component of the alkaline anion exchange membrane fuel cell, the research on the alkaline anion exchange membrane is still shallow compared with the proton exchange membrane, and there are mainly the following problems: low hydroxide ion conductivity, poor membrane dimensional stability, alkaline low stability
[0004] Therefore, in order to solve the problems of low hydroxide ion conductivity and poor membrane dimensional stability in the preparation of existing anion exchange membrane materials at the same time, the present invention introduces cyano groups into the membrane, and inhibits membrane swelling through enhanced intermolecular interactions. On the other hand, without sacrificing the solubility of the membrane

Method used

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  • Long-chain branched poly(arylene ether nitrile) anion exchange membrane and preparation method thereof
  • Long-chain branched poly(arylene ether nitrile) anion exchange membrane and preparation method thereof
  • Long-chain branched poly(arylene ether nitrile) anion exchange membrane and preparation method thereof

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Effect test

Embodiment 1

[0041] The synthesis of polyarylether nitrile: 2,6-difluorobenzonitrile, 0.7475g (2mmol) of 1.4050g (10mmol) 2,2-bis(3-amino-4-hydroxyl phenyl) hexafluoropropane, 2.7447 g (8mmol) of hexafluorobisphenol A and 1.3961g (10mmol) of potassium carbonate were added to a 50mL three-necked flask, then 5mL of toluene and 9mL of N,N-dimethylacetamide were added to form a mixed solution, and the mixture was prepared in a protective gas atmosphere. Gradually raise the temperature to 140°C, cool and reflux for about 4 hours until the water is completely removed, and then continue to heat up to 160°C for about 15 hours. After the reaction is completed, the product is slowly poured into the ethanol solution under mechanical stirring, and the filamentous polymer product is precipitated. Then, in order to further improve the purity of the product, a re-precipitation operation is carried out, that is, the obtained filamentous product is redissolved in N,N- In dimethylacetamide, it is prepared i...

Embodiment 2

[0047] The synthesis of polyarylether nitrile: 2,6-difluorobenzonitrile, 0.7475g (2mmol) of 1.4050g (10mmol) 2,2-bis(3-amino-4-hydroxyl phenyl) hexafluoropropane, 2.7447 g (8mmol) of hexafluorobisphenol A and 1.3961g (10mmol) of potassium carbonate were added to a 50mL three-necked flask, then 5mL of toluene and 9mL of N,N-dimethylacetamide were added to form a mixed solution, and the mixture was prepared in a protective gas atmosphere. Gradually raise the temperature to 140°C, cool and reflux for about 4 hours until the water is completely removed, and then continue to heat up to 160°C for about 15 hours. After the reaction is completed, the product is slowly poured into the ethanol solution under mechanical stirring, and the filamentous polymer product is precipitated. Then, in order to further improve the purity of the product, a re-precipitation operation is carried out, that is, the obtained filamentous product is redissolved in N,N- In dimethylacetamide, it is prepared i...

Embodiment 3

[0053] The synthesis of polyarylether nitrile: 1.4050g (10mmol) of 2,6-difluorobenzonitrile, 1.495g (4mmol) of 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane, 2.0585 g (6mmol) of hexafluorobisphenol A and 1.3961g (10mmol) of potassium carbonate were added to a 50mL three-necked flask, and then 5mL of toluene and 9mL of N,N-dimethylacetamide were added to form a mixed solution. Gradually raise the temperature to 140°C, cool and reflux for about 4 hours until the water is completely removed, and then continue to heat up to 160°C for about 15 hours. After the reaction is completed, the product is slowly poured into the ethanol solution under mechanical stirring, and the filamentous polymer product is precipitated. Then, in order to further improve the purity of the product, a re-precipitation operation is carried out, that is, the obtained filamentous product is redissolved in N,N- In dimethylacetamide, it is prepared into a solution with a mass concentration of 100g / L, and th...

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Abstract

The invention belongs to the technical field of alkaline anion exchange membranes, and relates to a long-chain branched poly(arylene ether nitrile) anion exchange membrane and a preparation method thereof. The preparation method comprises the steps of carrying out polycondensation reaction to successfully synthesize a poly(arylene ether nitrile) polymer with high solubility, introducing a long-chain branch structure into the polymer by directly taking amino of the polymer as a grafting site, functionalizing to obtain a membrane material with relatively good ionic conduction paths, and finallycasting to obtain the membrane. The prepared exchange membrane has relatively high ionic conductivity and good dimensional stability, and can be used in alkaline fuel cells.

Description

technical field [0001] The invention belongs to the technical field of basic anion exchange membranes, and relates to a long-chain branched polyarylether nitrile anion exchange membrane and a preparation method thereof. Background technique [0002] With the increasing energy crisis and the deteriorating global environmental pollution, it is imminent for human beings to develop clean and efficient new energy utilization methods. Due to its high energy conversion efficiency and environmental friendliness, fuel cells have attracted the attention of many scholars in recent years. Due to its excellent performance, proton exchange membrane fuel cells have been greatly developed in recent years, but the use of noble metal platinum as a catalyst for proton exchange membranes greatly increases the production cost of fuel cells and seriously hinders the development of proton exchange membrane fuel cells. battery development. Alkaline anion exchange membrane fuel cells have a simila...

Claims

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Application Information

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IPC IPC(8): C08G65/40C08J5/22H01M8/083
CPCC08G65/4006C08J5/2262C08J5/2293C08J2371/10H01M8/083H01M2300/0014Y02E60/50
Inventor 焉晓明查怀宁贺高红刘嘉霏桑嘉悦田震代岩潘昱
Owner DALIAN UNIV OF TECH
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