Preparation method of cross-linked macromolecule electrolyte membrane

A technology for cross-linking polymers and electrolyte membranes, applied in the field of polymers, can solve the problems of poor resistance to free radical oxidation, low proton conductivity, and decreased stability, so as to improve the resistance to white radical oxidation, improve the Comprehensive performance, the effect of inhibiting swelling rate

Inactive Publication Date: 2016-03-16
杨强 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sulfonated polyimide proton exchange membrane has good mechanical properties and thermal stability, but its proton conductivity is not high and requires a high degree of sulfonation, which leads to excessive swelling of the membrane, especially in the plane direction degree, resulting in a decrease in the stability of the membrane
In addition, the sulfonated polyimide proton exchange membrane still has the problem of poor resistance to free radical oxidation, which needs to be solved urgently

Method used

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  • Preparation method of cross-linked macromolecule electrolyte membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (a) Synthesis of NTDA-terminated polypyrrolene prepolymer

[0028] In a 100mL dry three-necked flask, 10mmol of 3,3'-diaminobenzidine DAB, 10.5mmol of 1,4,5,8-naphthalene tetracarboxylic anhydride NTDA, 22mmol of benzoic acid, 3mL of isoquinoline and 40mL of m- cresol, nitrogen protection and magnetic stirring; after 1h, heat up to 80°C for 4h, 180°C for 20h, after the reaction, cool down to 80°C and quickly pour it into 150mL methanol to obtain a large amount of solid precipitation; wash the product repeatedly with methanol , filtered and collected the polymer, dried in a vacuum oven at 160°C for 20 hours for use;

[0029] (b) Synthesis of BAPBDS end-capped sulfonated polyimide prepolymer

[0030] In a 100mL dry three-neck flask, add 1.6mmol 4,4'-bis(4-aminophenoxy)biphenyl-3,3'disulfonic acid aniline BAPBDS, 12.5mLm-cresol and 0.7mL triethylamine in sequence, Nitrogen protection and magnetic stirring; after BAPBDS is completely dissolved, then add 1.5mmol NTDA, 3.0m...

Embodiment 2

[0038] Similar to Example 1, the only difference is that 12 mmol of NTDA is used in step (a).

Embodiment 3

[0040] Similar to Example 1, the only difference is that 11 mnol of NTDA is used in step (a).

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Abstract

The invention discloses a preparation method of a cross-linked macromolecule electrolyte membrane. The preparation method comprises the steps: firstly using 3,3'-diaminobenzidine to react with excessive 1,4,5,8-naphthalenetetracarboxylic dianhydride to obtain a pre-polymer with ends blocked by anhydride naphthalene, then using 1,4,5,8-naphthalenetetracarboxylic dianhydride to react with excessive 4, 4'-bi(-aminophenoxy) biphenyl-3,3'-disulfonic acid to obtain a pre-polymer with ends blocked by amino groups, co-polymerizing the pre-polymer with ends blocked by anhydride naphthalene and slightly-excessive pre-polymer with ends blocked by amino groups to obtain a polypyrron-sulfonated polyimide segmented copolymer with ends blocked by fewer amino groups, then mixing the copolymer with an epoxy silane coupling agent KH-560 and phenylate, dissolving the copolymer, pouring to prepare a membrane, performing proton exchange, and then further cross-linking by using polyphosphoric acid. By adopting the preparation method, the electric conductivity is improved; moreover, the swelling rate of the membrane in a plane direction is effectively inhibited, the stability is improved, and the comprehensive performance of the membrane is improved under the condition that sulfonic acid groups are not obviously lost.

Description

technical field [0001] The invention belongs to the field of polymers, and more specifically, the invention relates to a preparation method of a cross-linked polymer electrolyte membrane. Background technique [0002] Polymer electrolyte membranes, such as proton exchange membranes, are the core components of fuel cells, which must have high proton conductivity, excellent mechanical properties, good thermal and chemical stability. Sulfonated polyimide proton exchange membrane has good mechanical properties and thermal stability, but its proton conductivity is not high and requires a high degree of sulfonation, which leads to excessive swelling of the membrane, especially in the plane direction degree, resulting in a decrease in the stability of the membrane. In addition, the sulfonated polyimide proton exchange membrane still has the problem of poor resistance to free radical oxidation, which needs to be solved urgently. [0003] Therefore, it is very necessary to adjust t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/22C08J3/24C08L87/00C08G81/00C08K5/5435C08K5/06C08K3/32H01M8/1072
CPCC08G81/00C08J3/247C08J5/18C08J5/2256C08J2387/00C08K3/32C08K5/06C08K5/5435C08K2003/329C08L87/005C08L2201/08C08L2203/16C08L2312/00C08L2312/08H01M8/1072Y02E60/50
Inventor 杨强姚娟梅管秀鹏
Owner 杨强
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