Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of cross-linked polypyridine-sulfonated polyimide block copolymer proton exchange membrane

A sulfonated polyimide block and proton exchange membrane technology, applied in the field of proton exchange membranes, can solve the problems of poor resistance to free radical oxidation, low proton conductivity, decreased stability, etc., to improve the resistance to free radicals. The effect of base oxidation performance, improving comprehensive performance and inhibiting swelling rate

Inactive Publication Date: 2016-08-17
张可可 +2
View PDF3 Cites 0 Cited by
  • Summary
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of cross-linked polypyridine-sulfonated polyimide block copolymer proton exchange membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0028] In a 100 mL dry three-necked flask, 10 mmol of 3,3'-diaminobenzidine DAB, 10.5 mmol of 1,4,5,8-naphthalene tetracarboxylic anhydride NTDA, 22 mmol of benzoic acid, 3 mL of isoquinoline and 40 mL of m -cresol, under nitrogen protection and magnetic stirring; after 1 hour, raise the temperature to 80°C for 4 hours, and 180°C for 20 hours. After the reaction, cool down to 80°C and quickly pour it into 150mL of methanol to obtain a large amount of solid precipitation. After the product was repeatedly washed with methanol, the polymer was collected by suction filtration and 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, 12.5mL m-cresol and 0.7mL triethyl Amine, nitrogen protection and magnetic stirring; a...

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).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a preparation method of a cross-linking polypyrrolone-sulfonated polyimide segmented copolymer proton exchange membrane. The method includes the steps that 3,3'-diaminobenzidine and excess 1,4,5,8-naphthalene tetracarboxylic dianhydride react to obtain anhydride-naphthalene-capped prepolymer, then 1,4,5,8-naphthalene tetracarboxylic dianhydride and excess 2,2'-bis(4-sulfonic phenoxy)benzidine react to obtain amino-capped prepolymer, finally, the anhydride-naphthalene-capped prepolymer and the amino-capped prepolymer are copolymerized according to equal mole to obtain a high-molecular-weight polypyrrolone-sulfonated polyimide segmented copolymer, and after membrane formation and prone exchange, polyphosphoric acid is used for further cross-linking so that the cross-linking polypyrrolone-sulfonated polyimide segmented copolymer proton exchange membrane can be obtained. The prepared cross-linking polypyrrolone-sulfonated polyimide segmented copolymer proton exchange membrane has the advantages of being high in mechanical strength and conductivity, low in swelling ratio and good in free radical oxidization resistance.

Description

technical field [0001] The invention belongs to the field of proton exchange membranes, and more specifically, the invention relates to a preparation method of a cross-linked polypyrrole-sulfonated polyimide block copolymer proton exchange membrane. Background technique [0002] The proton exchange membrane is the core component of the fuel cell, which must have high proton conductivity, excellent mechanical properties, good thermal stability 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] Therefo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/00C08G73/10C08J5/22C08L87/00
Inventor 张可可顾珂王琳琳
Owner 张可可
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com