High alkali resistance polyphenyl ether anion exchange membrane and preparing method thereof

An anion exchange membrane, polyphenylene ether technology, applied in electrical components, circuits, battery electrodes, etc., can solve problems such as difficulty in meeting actual fuel cell applications, decrease in ion exchange capacity and conductivity of anion exchange membranes, etc., and achieve easy industrial production. , low cost, good mechanical properties

Inactive Publication Date: 2017-02-22
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a relatively alkaline environment, the N1, C2, and N3 substitution positions on the imidazole ring are all affected by OH to varying degrees. - The attack of the anion ex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A high alkali resistance polyphenylene ether anion exchange membrane, the preparation method is as follows:

[0028] (1) Put polyphenylene ether (number average molecular weight 30000, 0.02mol, 2.404g) into a dry four-neck flask equipped with a stirrer, thermometer, and condenser, add 20mL of chlorobenzene to obtain a polyphenylene ether solution, and dissolve it completely Then add liquid bromine (0.01mol, 0.512mL), the molar ratio of polyphenylene ether: liquid bromine is 1:0.5, and then react at 80°C for 2h under the condition of nitrogen flow to obtain bromomethylated polyphenylene ether solution, which is precipitated , and then drying at 80°C for 48 hours to obtain bromomethylated polyphenylene ether;

[0029] (2) Put bromomethylated polyphenylene ether (0.01mol, 1.9910g) in step (1) into a dry four-necked flask equipped with a stirrer, a thermometer, and a condenser, and add 20mL of N-methylpyrrolidone to obtain Bromomethylated polyphenylene ether solution, add ...

Embodiment 2

[0033] A high alkali resistance polyphenylene ether anion exchange membrane, the preparation method is as follows:

[0034] (1) Put polyphenylene ether (number average molecular weight 30000, 0.02mol, 2.404g) into a dry four-neck flask equipped with a stirrer, thermometer, and condenser, add 20mL of chlorobenzene to obtain a polyphenylene ether solution, and dissolve it completely Then add liquid bromine (0.008mol, 0.410mL), the molar ratio of polyphenylene ether: liquid bromine is 1:0.4, and then react at 80°C for 2h under the condition of nitrogen flow to obtain bromomethylated polyphenylene ether solution, which is precipitated , and then dry at 80°C for 48 hours;

[0035] (2) Put bromomethylated polyphenylene ether (0.01mol, 1.9910g) in step (1) into a dry four-necked flask equipped with a stirrer, a thermometer, and a condenser, and add 20mL of N-methylpyrrolidone to obtain Bromomethylated polyphenylene ether solution, add imidazole reagent (0.01mol, 1.9020g) to the solu...

Embodiment 3

[0039] A high alkali resistance polyphenylene ether anion exchange membrane, the preparation method is as follows:

[0040] (1) Put polyphenylene ether (number average molecular weight 30000, 0.02mol, 2.404g) into a dry four-neck flask equipped with a stirrer, thermometer, and condenser, add 20mL of chlorobenzene to obtain a polyphenylene ether solution, and dissolve it completely Then add liquid bromine (0.012mol, 0.615mL), the molar ratio of polyphenylene ether: liquid bromine is 1:0.6, and then react at 80°C for 2h under the condition of nitrogen flow to obtain bromomethylated polyphenylene ether solution, which is precipitated, Then dry at 80°C for 48 hours;

[0041] (2) Put bromomethylated polyphenylene ether (0.01mol, 1.9910g) in step (1) into a dry four-necked flask equipped with a stirrer, a thermometer, and a condenser, and add 20mL of N-methylpyrrolidone to obtain Bromomethylated polyphenylene ether solution, add imidazole reagent (0.01mol, 1.9020g) to the solution,...

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Abstract

The invention belongs to the technical field of fuel cells, and particularly relates to a high alkali resistance polyphenyl ether anion exchange membrane and a preparing method thereof. The preparing method comprises the steps of conducting a bromination reaction to replace methyl hydrogen atoms in the polyphenyl ether and obtaining brooethyl polyphenyl ether; conducting reaction between imidazole solution and the brooethyl polyphenyl ether so as to make imidazole replace bromine atom and obtaining imidazole functionalization polyphenyl ether; synthesizing bisphenolA and 4,4'-difluorodiphenyl sulfone to obtain polysulfone solution, conducting stem grafting of the polysulfone to the imidazole through acylation copolymerization, and finally obtaining the high alkali resistance polyphenyl ether anion exchange membrane through a gel and gelatin melting process. Due to the fact that substituent group in the imidazole and steric effect of the polysulfone can well surround positive ions, attacking of OH- under an alkaline condition is hindered, so that degradation of a membrane is hindered. Besides, the high alkali resistance polyphenyl ether anion exchange membrane has a good mechanical property and a high alkaline resistance property.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a highly alkali-resistant polyphenylene ether anion exchange membrane and a preparation method thereof. Background technique [0002] Alkaline fuel cells (Alkaline Fuel Cell, AFC) can use non-platinum materials as catalysts, which avoids the use of platinum-containing catalysts and reduces manufacturing costs; the recycling of water by alkaline membrane fuel cells effectively avoids the proton exchange membrane fuel cells. The problem of water accumulation in the battery; the good chemical stability of the alkaline membrane provides a guarantee for the service life of the battery. Therefore, alkaline membrane fuel cells have become a new research hotspot in the field of fuel cells. [0003] At present, the synthesis method of the alkaline membrane of the fuel cell is to graft the quaternary ammonium cationic group or the quaternary phosphonium cationic group on th...

Claims

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Application Information

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IPC IPC(8): C08G81/00C08G65/48C08G65/40C08J5/22C08L71/12H01M4/88
CPCC08G65/4006C08G65/485C08G81/00C08G2650/50C08J5/2256C08J2371/12H01M4/8825Y02E60/50
Inventor 沈春晖陈继钦高山俊钱威王凯
Owner WUHAN UNIV OF TECH
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