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Cross-linked aminosulfonated polyfluorene ether sulfone nitrile proton exchange membrane material for fuel cells, preparation method and application thereof

A technology of aminosulfonated polyfluorene ether and proton exchange membrane, which is applied in the field of proton exchange membrane, can solve the problems of not meeting the requirements of direct methanol fuel cells, insufficient dimensional stability, and insufficient comprehensive performance, so as to maintain dimensional stability and mechanical Performance, Methanol permeation resistance, Dimensional stability improvement effect

Inactive Publication Date: 2019-06-11
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Proton exchange membrane is the core component of direct methanol fuel cells, and its lack of comprehensive performance is the biggest problem facing the industrialization of direct methanol fuel cells
The developed polymer electrolyte membrane materials generally have disadvantages such as poor alcohol resistance and insufficient dimensional stability at high ion conductivity.
Even the Nafion membrane with perfluorosulfonic acid structure still cannot meet the requirements of direct methanol fuel cells

Method used

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  • Cross-linked aminosulfonated polyfluorene ether sulfone nitrile proton exchange membrane material for fuel cells, preparation method and application thereof
  • Cross-linked aminosulfonated polyfluorene ether sulfone nitrile proton exchange membrane material for fuel cells, preparation method and application thereof
  • Cross-linked aminosulfonated polyfluorene ether sulfone nitrile proton exchange membrane material for fuel cells, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Dissolve 13.84g of p-nitroaniline in a mixed solution of 30mL of distilled water and 30mL of absolute ethanol, then add concentrated hydrochloric acid with a mass fraction of 38%, to obtain a p-nitroaniline solution, slowly add 34mL of concentrated hydrochloric acid; then 7.6g of Dissolve sodium nitrate in 40mL of distilled water; then add the sodium nitrite solution dropwise to the above-mentioned p-nitroaniline solution, and react at 0-5°C to prepare the diazonium salt solution;

[0032] Add 8.64g p-benzoquinone and 25.46g sodium bicarbonate to 100mL distilled water to form a mixture of p-benzoquinone and sodium bicarbonate, add the above-mentioned diazonium salt solution containing p-nitroaniline to p-benzoquinone and bicarbonate In the sodium mixed solution, react for 5 hours after the dropwise addition, control the reaction temperature at 10°C to obtain the mixed solution, filter the mixed solution under reduced pressure, and then wash it with distilled water 4 time...

Embodiment 2

[0035] (1) Under nitrogen protection, add 0.003mol (0.603g) 4-aminophenylhydroquinone, 0.012mol (4.20492g ) bisphenol fluorene, 0.0105mol (1.46055g) 2,6-difluorobenzonitrile, 0.0045mol (2.2095g) 3,3′-sodium disulfonate-4,4′-dichlorodiphenylsulfone, 20mL sulfolane , 2.5875g potassium carbonate, 15mL toluene, reflux at 128°C, add water for 4 hours, let off the water-carrying agent; raise the temperature to 170°C, distill the toluene, continue the reaction for 10 hours, discharge the material in water, and obtain a strip-shaped polymer The obtained strip polymer was crushed with a masher, boiled 6 times with distilled water, and dried in a vacuum oven at 40°C for 48 hours; 7.9 g of polyfluorene ether sulfone nitrile copolymer containing aminosulfonated was obtained.

[0036] (2) Dissolve 1.0 g of polyfluorene ether sulfonenitrile copolymer containing aminosulfonate in 10 mL of N,N-dimethylformamide (DMF), and stir the mixed solution for 8 hours to obtain a film-forming solution; ...

Embodiment 3

[0040] (1) Under nitrogen protection, add 0.0015mol (0.3015g) 4-aminophenylhydroquinone, 0.0135mol (4.730535g ) bisphenol fluorene, 0.0105mol (1.46055g) 2,6-difluorobenzonitrile, 0.0045mol (2.2095g) 3,3′-sodium disulfonate-4,4′-dichlorodiphenylsulfone, 20mL sulfolane , 2.5875g potassium carbonate, 15mL toluene, reflux at 128°C, add water for 4 hours, let off the water-carrying agent; raise the temperature to 170°C, distill the toluene, continue the reaction for 10 hours, discharge the material in water, and obtain a strip-shaped polymer The obtained strip polymer was crushed with a masher, boiled 6 times with distilled water, and dried in a vacuum oven at 40° C. for 48 hours; 8.1 g of polyfluorene ether sulfone nitrile copolymer containing aminosulfonated was obtained.

[0041] (2) Dissolve 1.0 g of polyfluorene ether sulfonenitrile copolymer containing aminosulfonate in 10 mL of N,N-dimethylformamide (DMF), and stir the mixed solution for 8 hours to obtain a film-forming liqu...

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Abstract

The invention discloses a cross-linked aminosulfonated polyfluorene ether sulfone nitrile proton exchange membrane material for fuel cells, a preparation method and an application thereof, belonging to the technical field of proton exchange membranes. It is based on 2,6-difluorobenzonitrile, 3,3'-sodium disulfonate-4,4'-dichlorodiphenyl sulfone, bisphenol monomer and 4-aminophenylhydroquinone as raw materials , through nucleophilic polycondensation reaction to prepare aminosulfonated polyfluorene ether nitrile polymer, and then acidify to obtain aminosulfonated polyfluorene ether sulfonenitrile material, and then configure it as a film-forming solution, and then use casting method to form a film. Obtain a proton exchange membrane. The preparation method of the invention is simple, the production period is short, and the prepared proton exchange membrane has high proton conductivity and good stability. A series of membranes prepared in the invention have broad development prospects in the field of direct methanol fuel cells.

Description

technical field [0001] The invention belongs to the technical field of proton exchange membranes, and in particular relates to a cross-linked aminosulfonated polyfluorene ether sulfonenitrile proton exchange membrane material for fuel cells, a preparation method and its application in the preparation of proton exchange membranes. Background technique [0002] At present, the combustion of fossil energy such as coal, oil, and natural gas will cause environmental pollution, and is non-renewable and rapidly exhausted, while new energy sources such as wind energy, water energy, tidal energy, and solar energy are easily affected by geographical conditions and environmental factors, and are intermittent. and instability. Therefore, it is imminent to develop an environmentally friendly green energy with high energy conversion rate. As a new energy source, fuel cells have the advantages of fast start-up, low noise, high efficiency, easy fuel storage, no electrolyte leakage, and lon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G75/20C08J5/22H01M8/0221H01M2/16H01M2/14C08L81/06
CPCH01M8/0221C08G75/20C08J5/2256C08J2381/06H01M50/403H01M50/409Y02P70/50Y02E60/50Y02E60/10
Inventor 王哲罗雪妍徐晶美李名卉田雪王蕾
Owner CHANGCHUN UNIV OF TECH
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