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Sulfonated polyimide with hydrolysis resistance, and preparation method and application thereof

A technology of sulfonated polyimide and sulfonated polyimide block, applied in the field of polymers, can solve the problems of limited range of hydrolysis resistance, difficult synthesis, etc., achieve easy operation and control, good application prospect, The effect of improving hydrolytic stability

Inactive Publication Date: 2012-10-24
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has limited scope for improving hydrolysis resistance and is difficult to synthesize

Method used

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  • Sulfonated polyimide with hydrolysis resistance, and preparation method and application thereof
  • Sulfonated polyimide with hydrolysis resistance, and preparation method and application thereof
  • Sulfonated polyimide with hydrolysis resistance, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Add 10mmol 4,4′-diaminobiphenyl-2,2′-disulfonic acid and 21mmol triethylamine to 56mL m-cresol, and so on 4,4′-diaminobiphenyl-2,2′-disulfonic acid After the sulfonic acid was completely dissolved, 10 mmol of 4,4'-(4",4'''-dioxy-diphenylsulfone)-1,1',8,8'-naphthalene tetracarboxylic dianhydride and 10 mmol of benzoic acid were added. First raise the temperature to 100°C for 2 hours, then raise the temperature to 200°C for 4 hours. After cooling, pour it into 600mL acetone to obtain a fibrous solid, which is fully washed and dried to obtain a polymer.

[0062] The comparative logarithmic viscosity of the prepared polymer is: 0.42dL / g (test conditions: test in m-cresol, temperature is 30°C; concentration is 0.5g / dL).

[0063] Infrared spectrum characterization of the prepared polymer: the typical absorption peak of the imide ring: 1708cm -1 (C=O asymmetric stretching vibration), 1668cm -1 (C=O symmetrical stretching vibration), 1366cm -1 (C-N stretching vibration); typ...

Embodiment 2

[0068] Add 10mmol of 4,4'-diaminodiphenyl ether-2,2'-disulfonic acid and 23mmol of triethylamine into 60mL of m-cresol, etc. 4,4'-diaminodiphenyl ether-2,2' - After the disulfonic acid is completely dissolved, add 10mmol of 4,4'-(4",4'''-dimercaptobenzophenone)-1,1',8,8'-naphthalene tetracarboxylic dianhydride and 12mmol of triethylene Diamine. First raise the temperature to 100°C for 2 hours, then raise the temperature to 200°C for 6 hours. After cooling, pour it into 800mL acetone to obtain a fibrous solid, which is fully washed and dried to obtain a polymer.

[0069] The comparative logarithmic viscosity of the prepared polymer is: 0.45dL / g (test conditions: test in m-cresol, temperature is 30°C; concentration is 0.5g / dL).

[0070] Infrared spectrum characterization of the prepared polymer: the typical absorption peak of the imide ring: 1708cm -1 , 1669cm -1 , 1366cm -1 ;Typical absorption peak of sulfonic acid group: 1192cm -1 , 1028cm -1 .

[0071] The polymer obtai...

Embodiment 3

[0075] Add 10mmol 9,9′-bis(4-aminophenyl)fluorene-2,7′disulfonic acid and 20mmol tri-n-butylamine into 68mL m-cresol, and treat 9,9′-bis(4-aminophenyl After completely dissolving fluorene-2,7'disulfonic acid, add 10mmol 4,4'-(4",4'''-dioxy-diphenylisohexafluoropropane)-1,1',8 , 8'-naphthalene tetracarboxylic dianhydride and 12mmol triethylenediamine. First heat up to 80°C for 2h, then heat up to 180°C for 16h. Cool and pour into 800mL ethanol to obtain a fibrous solid, fully wash and Dry to obtain the polymer.

[0076] The comparative logarithmic viscosity of the prepared polymer is: 0.41dL / g (test conditions: test in m-cresol, temperature is 30°C; concentration is 0.5g / dL)

[0077] Infrared spectrum characterization of the prepared polymer: the typical absorption peak of the imide ring: 1707cm -1 , 1666cm -1 , 1366cm -1 ;Typical absorption peak of sulfonic acid group: 1192cm -1 , 1022cm -1 .

[0078] The polymer obtained is a sulfonated polyimide homopolymer with the f...

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Abstract

The invention discloses a sulfonated polyimide with hydrolysis resistance, which is one or two selected from sulfonated polyimide homopolymer, sulfonated polyimide segmented copolymer and sulfonated polyimide random copolymer. The sulfonated polyimide has excellent hydrolytic stability, especially hydrolytic stability under high temperature, and can be used for preparation of sulfonated polyimide matrix proton exchange membrane material. The invention also discloses preparation methods of sulfonated polyimide with hydrolysis resistance and sulfonated polyimide matrix proton exchange membrane material. The method is simple, easy for operation and control, and suitable for industrialized production.

Description

technical field [0001] The invention relates to the field of polymers, in particular to a hydrolysis-resistant sulfonated polyimide and its preparation method and application. Background technique [0002] With the depletion of coal, oil, natural gas and other energies that can be supplied by nature and the increasing emphasis on environmental protection in countries all over the world, fuel cells, as a clean, efficient and safe green new energy, have shown attractive and broad prospects. market development prospects. As the fifth-generation fuel cell, proton exchange membrane fuel cell (PEMFC) has the advantages of high energy conversion rate, fast start-up at room temperature, no electrolyte leakage, simple structure, and low cost. The fastest type of fuel cell. Proton exchange membrane (PEM) is the core component of proton exchange membrane fuel cell, and its performance directly determines the service life, operation stability and fuel utilization efficiency of the fue...

Claims

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Application Information

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IPC IPC(8): C08G73/10H01M8/02H01M2/16C08J7/14C08J5/22
CPCY02E60/12Y02E60/50Y02P70/50
Inventor 魏海兵方省众薛立新张畏锋段艳琴陈国飞
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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