Preparation and application of covalent cross-linked polyfluoro sulfonated polyimide proton exchange membrane

A technology of polyfluorinated sulfonated polyimide and sulfonated polyimide, applied in the field of battery separators, can solve the problem of incompatibility between functional monomers and sulfonated polyimide, and small improvement in chemical stability of ion crosslinking , It is difficult to improve the stability of the diaphragm to achieve the effect of improving chemical stability, chemical stability and mechanical properties.

Active Publication Date: 2021-08-27
SOUTHWEAT UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the method (1), the incompatibility of the functional monomer and the sulfonated polyimide usually occurs, so that it is difficult to improve the stability of the diaphragm; in the method (2), the ion Cross-linking has little effect on chemical stability

Method used

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  • Preparation and application of covalent cross-linked polyfluoro sulfonated polyimide proton exchange membrane
  • Preparation and application of covalent cross-linked polyfluoro sulfonated polyimide proton exchange membrane
  • Preparation and application of covalent cross-linked polyfluoro sulfonated polyimide proton exchange membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A method for covalent cross-linking polyfluorulfonated polyimide proton exchange membrane, which is:

[0044] Step 1, under nitrogen protection, 2,2'-sulfonate, bishenolate 4 mmol, triethylamine 4mmol, amphorin, 70 mL, temperature rise to 60 ° C, stirring to completely Dissolve; 4,4 '- (1,1' double (4-aminophenoxy)) octophenyl 2 mmol, 2,2-bis (3-amino-4-hydroxybenzene) was added to 250 ml of tri-necked flask. Base) hexafluoropropane 2 mmol, continued to stir until completely dissolve; 1,4,5,8-naphthalate dianhydride 8 mmol, benzoic acid 16 mmol, stirred to 80 ° C, stirred at 80 ° C for 4. 50 ° C, and stirred to 80 ° C for stirring to 80 ° C for 1,4,5,8-naphthallic dianhydride. The temperature was warmed to 180 ° C, the reaction was 18 h; the reaction system was cooled to 90 ° C or less, and 15 ml of meludes were added to 250 ml of three-necked flask, and the system continued to cool down until 50 ° C; the reaction system was poured into 200 ml of precipitant acetone. To obt...

Embodiment 2

[0051] A method for covalent cross-linking polyfluorulfonated polyimide proton exchange membrane, which is:

[0052] Step 1, under nitrogen protection, 2,2'-sulfonate, bishenolate 4 mmol, triethylamine 4mmol, amphorin, 70 mL, temperature rise to 60 ° C, stirring to completely Dissolve; 4,4 '- (1,1' double (4-aminophenoxy)) octophenyl 2 mmol, 2,2-bis (3-amino-4-hydroxybenzene) was added to 250 ml of tri-necked flask. Based) Slurfluoropropane 2 mmol, continued to stir until completely dissolved; 1,4,5,8-naphthalate diallorhydride 8 mmol, benzoic acid was added to 80 ° C for 1,4,5,8-naphthallonic dianhydride. Then he was warmed to 180 ° C, and the reaction was 18 h. After the reaction system was cooled to 90 ° C or less, 15 ml of meptes were added to a 250 mL of three-necked flask, and the system continued to cool down until 50 ° C. The reaction system was poured into 200 ml of precipitant acetone, resulting in a solid, filtered, dried, and then obtained, to obtain a polyvilulfonated...

Embodiment 3

[0059] A method for covalent cross-linking polyfluorulfonated polyimide proton exchange membrane, which is:

[0060] Step 1, under nitrogen protection, 2,2'-sulfonate, bishenolate 4 mmol, triethylamine 4mmol, amphorin, 70 mL, temperature rise to 60 ° C, stirring to completely Dissolve; 4,4 '- (1,1' double (4-aminophenoxy)) octophenyl 2 mmol, 2,2-bis (3-amino-4-hydroxybenzene) was added to 250 ml of tri-necked flask. Based) Slurfluoropropane 2 mmol, continued to stir until completely dissolved; 1,4,5,8-naphthalate diallorhydride 8 mmol, benzoic acid was added to 80 ° C for 1,4,5,8-naphthallonic dianhydride. Then he was warmed to 180 ° C, and the reaction was 18 h. After the reaction system was cooled to 90 ° C or less, 15 ml of meptes were added to a 250 mL of three-necked flask, and the system continued to cool down until 50 ° C. The reaction system was poured into 200 ml of precipitant acetone, resulting in a solid, filtered, dried, and then obtained, to obtain a polyvilulfonated...

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Abstract

The invention discloses preparation and application of a covalent cross-linked polyfluoro sulfonated polyimide proton exchange membrane. The preparation method comprises the following steps: preparing 4,4'-(1,1'-bis(4-aminophenoxy))octafluorobiphenyl, and subjecting the 4,4'-(1,1'-bis(4-aminophenoxy))octafluorobiphenyl serving as a raw material to condensation polymerization so as to prepare a triethylamine type hydroxyl-functionalized polyfluoro sulfonated polyimide polymer; dissolving the triethylamine type hydroxyl-functionalized polyfluoro sulfonated polyimide polymer in dimethyl sulfoxide, and adding polyacrylic acid serving as a cross-linking agent and 4-dimethylaminopyridine serving as a catalyst for a reaction; after the reaction is finished, conducting casting to form a membrane so as to prepare a triethylamine covalent cross-linked polyfluoro sulfonated polyimide proton exchange membrane. and placing the triethylamine covalent cross-linked polyfluoro sulfonated polyimide proton exchange membrane in a detergent for washing and acidifying to obtain the covalent cross-linked polyfluoro sulfonated polyimide proton exchange membrane. The covalent cross-linked polyfluoro sulfonated polyimide proton exchange membrane prepared in the invention has good performance and is suitable for an all-vanadium redox flow battery.

Description

Technical field [0001] The present invention belongs to the field of battery diaphragm, and more particularly to a method and application of a covalent cross-linking polyfluorozardous polyimide proton exchange membrane. Background technique [0002] The shortage of traditional fossil energy and its large number of environmental pollution have become one of the main bottlenecks that restrict the continued development of national economies and hinders the improvement of people's living standards. Therefore, the development and utilization of new renewable energy has been highly valued by the country. However, the new renewable energy power generation process is susceptible to power generation time, day and night, season and other factors, with significant discontinuous, instability. Equipped with an efficient energy storage device is one of the important ways to solve problems with new renewable energy power generation. [0003] The full vanadium oxidation liquid flow battery is an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/22C08J3/24C08L79/08C08L33/02H01M8/1046H01M8/1069
CPCC08J5/2262C08J3/24H01M8/1046H01M8/1069C08J2379/08C08J2433/02Y02E60/50
Inventor 张亚萍李劲超胥文杰罗钢黄文恒龙俊刘军罗欢
Owner SOUTHWEAT UNIV OF SCI & TECH
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