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Arylene ether nitrile proton exchange membrane including side chain with flexible sulfonic acid ion cluster structure and preparation method thereof

A technology of proton exchange membrane and polyarylether nitrile, which is applied in the field of polymer proton exchange membrane and its preparation, can solve the problems of poor dimensional stability, insufficient oxidation resistance stability, poor ion conductivity, etc., and achieve a simple and good preparation method. Ionic conductivity, the effect of easy industrial production

Active Publication Date: 2016-11-09
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The patent of this invention aims to improve the problems of poor ion conductivity, poor dimensional stability, and insufficient oxidation resistance stability in aromatic sulfonated polymer proton exchange membrane materials, and provides a class of polyaromatic polymers with a flexible sulfonic acid ion cluster structure in the side chain. Ether nitrile proton exchange membrane material; by simultaneously introducing strong polar nitrile groups and flexible side chain sulfonic acid ion cluster structures into polymer molecules, the performance of polymer membranes can be effectively improved. This type of side chain contains flexible sulfonic acid ion clusters Acid ion cluster structure polyarylether nitrile proton exchange membrane with potential application value in fuel cells

Method used

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  • Arylene ether nitrile proton exchange membrane including side chain with flexible sulfonic acid ion cluster structure and preparation method thereof
  • Arylene ether nitrile proton exchange membrane including side chain with flexible sulfonic acid ion cluster structure and preparation method thereof

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Effect test

Embodiment 1

[0019] (1) Preparation of polyaryl ether nitrile polymer containing amine group structure

[0020] In a 100ml dry three-necked flask equipped with mechanical stirring and nitrogen protection, respectively add 1.3910g (10mmol) of 2,6-difluorobenzonitrile, 0.7352g (taking ionized structural unit content x=0.34 as an example) and 1.2290g (6.6mmol) of biphenol, 1.3821g (10mmol) of potassium carbonate, 16.4ml (29.3ml) of N-methylpyrrolidone, after stirring the reaction at 150°C for 3h, the reaction was terminated, and the reaction solution was poured into ethanol After further filtering and washing, a polyaryl ether nitrile polymer containing an amine group structure is obtained with a yield of 99%.

[0021] (2) Preparation of polyaryl ether nitrile polymer with sulfonic acid sodium salt structure in side chain

[0022] In a 100ml dry three-necked flask equipped with mechanical stirring and nitrogen protection, 2g of polyarylether nitrile polymer containing amine group structure (taking ...

Embodiment 2

[0026] (1) Preparation of polyaryl ether nitrile polymer containing amine group structure

[0027] In a 100ml dry three-necked flask equipped with mechanical stirring and nitrogen protection, respectively add 1.3910g (10mmol) of 2,6-difluorobenzonitrile, 0.7352g (taking ionized structural unit content x=0.34 as an example) and 1.2290g (6.6mmol) of biphenol, 1.7940g (13mmol) of potassium carbonate, 29.3ml of N-methylpyrrolidone, after stirring the reaction at 130°C for 6h, the reaction was terminated, the reaction solution was poured into ethanol, and further filtered, After washing, a polyarylene ether nitrile polymer containing an amine group structure was obtained with a yield of 99%.

[0028] (2) Preparation of polyaryl ether sulfone ketone proton exchange membrane material containing polysulfonic acid structure

[0029] In a 100ml dry three-necked flask equipped with mechanical stirring and nitrogen protection, dissolve 2g of polyaryl ether nitrile polymer with amine group struc...

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Abstract

The invention provides an arylene ether nitrile proton exchange membrane including a side chain with a flexible sulfonic acid ion cluster structure and a preparation method thereof. The preparation method comprises the steps that firstly, copolycondensation is conducted on an active difluoronitrile monomer, a diamino bisphenol monomer and biphenol to prepare a poly arylene ether nitrile polymer with an amino structure, further butane sultone serves as a sulfonating reagent and sodium hydride serves as a catalyst, sulfonation is performed under relatively mild reaction conditions, and then the arylene ether nitrile proton exchange membrane including the side chain with the flexible sulfonic acid ion cluster structure can be obtained through film coating and acidification displacement. The arylene ether nitrile proton exchange membrane including the side chain with the flexible sulfonic acid ion cluster structure is simple in preparation process and has excellent film-forming properties, and a prepared thin polymer film has good ionic conductivity, dimensional stability and chemical oxidation resistance stability and can be used for fuel cells.

Description

Technical field [0001] The invention belongs to the field of polymer proton exchange membranes and preparation thereof, and particularly relates to a type of side chain polyarylether nitrile proton exchange membrane with flexible sulfonic acid ion cluster structure and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cells are a type of new energy battery that has developed rapidly in recent years. It has the characteristics of high efficiency, safety and environmental friendliness. The proton exchange membrane is the core key material in the fuel cell, which plays the role of transporting protons and blocking fuel and oxidant in the cell. At present, the commercially available proton exchange membrane materials are mainly perfluorosulfonic acid membranes produced by DuPont, USA. Although this type of membrane material has good proton conductivity and dimensional stability, it has disadvantages such as high cost and high fuel permeability....

Claims

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Application Information

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IPC IPC(8): C08G65/48C08G65/40C08J5/22H01M8/0221H01M8/00C08L71/10
CPCC08G65/4006C08G65/48C08J5/2256C08J2371/10H01M8/00H01M8/0221Y02E60/50
Inventor 汪称意徐常赵晓燕李锦雯李坚任强
Owner CHANGZHOU UNIV
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