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Sulfonating long branched chain type polyphenyl ether proton exchange membrane and preparation method thereof

A technology of proton exchange membrane and polyphenylene ether, which is used in the preparation of proton exchange membrane and the field of electrochemistry, can solve the problems of high price, limited commercial application and high vanadium ion permeability

Inactive Publication Date: 2018-01-19
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the vanadium ion permeability of this type of membrane is high and the price is expensive, which greatly limits its large-scale commercial application.

Method used

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  • Sulfonating long branched chain type polyphenyl ether proton exchange membrane and preparation method thereof
  • Sulfonating long branched chain type polyphenyl ether proton exchange membrane and preparation method thereof
  • Sulfonating long branched chain type polyphenyl ether proton exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Acylation of polyphenylene ether: Prepare a 1,2-dichloroethane solution of polyphenylene ether with a w / v concentration of 0.06%, add 0.8 times of polyphenylene ether under the protection of an ice-water bath and an inert gas aluminum trichloride in the amount of substance, and then add p-fluorobenzoyl chloride 0.7 times the amount of polyphenylene ether; move it to an oil bath, and react with magnetic stirring at 60°C for 10h; pour it into ethanol to precipitate, and wash repeatedly. and dry;

[0032] (2) Condensation reaction of the acylation product: the N-methylpyrrolidone solution of the acylation product with a w / v concentration of 10% is prepared, and the degree of acylation is 70%; under the protection of an inert gas, add 2.25 times of acylation The amount of sodium p-hydroxybenzenesulfonate in the amount of the product substance; then add 5.06 times the amount of potassium carbonate in the amount of the acylation product substance, remove water by bubbling...

Embodiment 2

[0034] (1) Acylation of polyphenylene ether: Prepare a 1,2-dichloroethane solution of polyphenylene ether with a w / v concentration of 0.06%, add 0.7 times of polyphenylene ether under the protection of an ice-water bath and an inert gas aluminum trichloride in the amount of substance, and then add p-fluorobenzoyl chloride 0.6 times the amount of polyphenylene ether; move it to an oil bath, and react with magnetic stirring at 60°C for 10h; pour it into ethanol to precipitate, and wash repeatedly. and dry;

[0035] (2) Condensation reaction of acylated products: N,N-dimethylacetamide solution of acylated products with a w / v concentration of 12% is prepared, the degree of acylation is 60%; under the protection of an inert gas, add 2.25 twice the amount of the acylation product; add potassium carbonate three times the amount of the acylation product, remove water by bubbling, and react at 140°C for 110 hours; pour into ethyl acetate to precipitate , repeated cleaning, and drying;...

Embodiment 3

[0037] (1) Acylation of polyphenylene ether: Prepare a 1,2-dichloroethane solution of polyphenylene ether with a w / v concentration of 0.06%, add 0.6 times of polyphenylene ether under the protection of an ice-water bath and an inert gas aluminum trichloride in the amount of substance, and then add p-fluorobenzoyl chloride 0.5 times the amount of polyphenylene ether; move it to an oil bath, and react with magnetic stirring at 60°C for 10 hours; pour it into ethanol to precipitate, and wash repeatedly. and dry;

[0038] (2) Condensation reaction of acylated products: N,N-dimethylacetamide solution of acylated products with a w / v concentration of 12% is prepared, the degree of acylation is 50%; under the protection of an inert gas, add 2.25 twice the amount of the acylation product as sodium p-hydroxybenzenesulfonate; then add 3 times the amount of potassium carbonate as the acylation product, remove water by bubbling, and react at 140°C for 92 hours; pour into ethyl acetate to p...

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Abstract

The invention provides a sulfonating long branched chain type polyphenyl ether proton exchange membrane and a preparation method thereof, and belongs to preparation and electrochemistry fields of proton exchange membranes. The preparation method comprises the following steps: firstly carrying out acylation on polyphenyl ether, and then carrying out a condensation reaction with sodium p-hydroxybenzenesulfonic acid to obtain the sulfonating long branched chain type polyphenyl ether proton exchange membrane. Compared with a traditional sulfonating main chain type aromatic polymer, due to the factthat sulfonic acid groups are introduced onto long branched chains with certain flexibility, hydrophilic groups are easily clustered mutually, an ion cluster is formed, and then a lyophobic main chain gets away, an obvious hydrophilic / lyophobic microphase separation structure is formed, relatively high proton conduction rate when the degree of sulfonation is relatively low is guaranteed, and thenthe energy efficiency of the battery is improved, so that the polyphenyl ether proton exchange has excellent application prospect in the application of ion exchange membranes for all-vanadium redox flow batteries.

Description

technical field [0001] The invention relates to the preparation of proton exchange membranes and the field of electrochemistry, in particular to a method for preparing a sulfonated long-chain branched polyphenylene ether proton exchange membrane. Background technique [0002] All vanadium redox flow battery (VRB for short) is a new type of green energy storage battery. Compared to other redox flow batteries, for example, vanadium / bromine flow batteries, zinc / bromine flow batteries, and sodium polysulfide / bromine flow batteries. All-vanadium redox flow battery has the advantages of long service life, fast charging, easy capacity increase, high energy efficiency, simple structure, flexible design, deep discharge and high safety, and is widely used in renewable energy such as solar energy and wind energy. field. All-vanadium redox flow battery has broad application prospects as a large-scale energy storage technology. [0003] The ion exchange membrane is one of the key comp...

Claims

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Application Information

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IPC IPC(8): H01M8/18C08G65/48
CPCY02E60/50Y02P20/10
Inventor 焉晓明孙佳慧贺高红阮雪华代岩郑文姬
Owner DALIAN UNIV OF TECH
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