Phosphonic acid doped cross-linked sulfonated polyiminobenzimidazole high-temperature proton exchange membrane and preparation method thereof

A technology of bisulfonated polyiminobenzimidazole and sulfonated polyiminobenzimidazole is applied in the field of phosphonic acid-doped cross-linked sulfonated polyiminobenzimidazole high-temperature proton exchange membrane and preparation thereof, and can solve the problem of Poor thermal stability, inability to use, low proton conductivity, etc., to achieve the effects of good mechanical properties, simple preparation method, and high proton conductivity

Inactive Publication Date: 2016-07-20
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology provides for better performance characteristics than existing methods used alone or mixed together due to its simplicity and ease of operation compared to previous techniques such as chemical modification. It also allows for more flexibility when selecting different materials based upon their desired functioning temperatures. Overall, this new material can be useful in various applications where higher ionic conduction rates would improve overall efficiency.

Problems solved by technology

This patented technical problem addressed by this patents relates to finding better materials for making improved hydrogen/oxygen (H2) generation systems with good performance over both normal operating temperatures and very challenged environments like sea water due to their strong oxidizing power compared to oxygen.

Method used

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  • Phosphonic acid doped cross-linked sulfonated polyiminobenzimidazole high-temperature proton exchange membrane and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of a phosphonic acid-doped cross-linked sulfonated polyiminobenzimidazole high-temperature proton exchange membrane, the steps are as follows:

[0028] 1) Add 1.8mmol of 4,4'-diaminodiphenyl ether-2,2'-disulfonic acid into a mixed solvent of 15mL of m-cresol and 0.8mL of triethylamine, blow in nitrogen gas, and stir thoroughly until diaminodiphenyl ether Dissolve all the sulfonic acid to obtain diaminodisulfonic acid solution, add 1.4mmol3,3'-bis(4-sulfonic acid phenyl)benzidine, 1mmol6,6'-bis[2-(4 -aminophenyl)]benzimidazole and 2mmol1,4,5,8-naphthalene tetracarboxylic dianhydride, stirred at room temperature for 10min, heated at 80°C for 5h, then heated at 180°C for 24h, and cooled to room temperature naturally. Then add 12mL of m-cresol and 100mL of acetone as diluent, stir well and then filter, filter out the fibrous precipitate, wash the precipitate with acetone for 3-5 times, and then vacuum dry at 80°C for 10h to obtain sulfonated polymer. iminobenzi...

Embodiment 2

[0033] Preparation of a phosphonic acid-doped cross-linked sulfonated polyiminobenzimidazole high-temperature proton exchange membrane, the steps are as follows:

[0034]1) Add 1.8mmol of 4,4'-diaminodiphenyl ether-2,2'-disulfonic acid into a mixed solvent of 15mL of m-cresol and 0.8mL of triethylamine, blow in nitrogen gas, and stir thoroughly until diaminodiphenyl ether Dissolve all the sulfonic acid to obtain diaminodisulfonic acid solution, add 1.4mmol3,3'-bis(4-sulfonic acid phenyl)benzidine, 1mmol6,6'-bis[2-(4 -Aminophenyl)]benzimidazole and 2.2 mmol 1,4,5,8-naphthalene tetracarboxylic dianhydride, fully stirred at room temperature, first heated at 80°C for 5h, then heated at 180°C for 24h, and naturally cooled to room temperature , then add 12mL of m-cresol and 100mL of acetone as diluents, stir well and filter, filter out the fibrous precipitate, wash the precipitate with acetone, and then vacuum dry to obtain sulfonated polyiminobenzimidazole;

[0035] 2) dissolving ...

Embodiment 3

[0039] Preparation of a phosphonic acid-doped cross-linked sulfonated polyiminobenzimidazole high-temperature proton exchange membrane, the steps are as follows:

[0040] 1) Add 1.8mmol of 4,4'-diaminodiphenyl ether-2,2'-disulfonic acid into a mixed solvent of 15mL of m-cresol and 0.8mL of triethylamine, blow in nitrogen gas, and stir thoroughly until diaminodiphenyl ether Dissolve all the sulfonic acid to obtain diaminodisulfonic acid solution, add 1.4mmol3,3'-bis(4-sulfonic acid phenyl)benzidine, 1mmol6,6'-bis[2-(4 -Aminophenyl)]benzimidazole and 2.4 mmol 1,4,5,8-naphthalene tetracarboxylic dianhydride, fully stirred at room temperature, first heated at 80°C for 5h, then heated at 180°C for 24h, and naturally cooled to room temperature , then add 12mL of m-cresol and 100mL of acetone as diluents, stir well and filter, filter out the fibrous precipitate, wash the precipitate with acetone, and then vacuum dry to obtain sulfonated polyiminobenzimidazole;

[0041] 2) dissolving...

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Abstract

The invention relates to a phosphonic acid doped cross-linked sulfonated polyiminobenzimidazole high-temperature proton exchange membrane and a preparation method thereof. The preparation method includes: 1), in a nitrogen atmosphere, dissolving diaminodisulfonic acid in a solvent to obtain a diaminodisulfonic acid solution, adding benzidine, aminophenylbenzimidazole and naphthalene tetracarboxylic acid dianhydride into the diaminodisulfonic acid solution, fully stirring well at room temperature, heating for reaction, naturally cooling to room temperature, adding a diluent, fully stirring, filtering, washing and drying solid substance which is filtered out to obtain sulfonated polyiminobenzimidazole; 2), dissolving the sulfonated polyiminobenzimidazole in dimethylsulfoxide to obtain a solution, adding dibromodiphenyl ether, mixing well, and allowing reaction to obtain a high-temperature proton exchange membrane; 3), disposing the high-temperature proton exchange membrane in an amino trimethylene phosphonic acid water solution for soaking, washing, and heating for reaction to obtain the phosphonic acid doped cross-linked sulfonated polyiminobenzimidazole high-temperature proton exchange membrane.

Description

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Claims

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Application Information

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Owner WUHAN UNIV OF TECH
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