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Proton exchange membrane having self-repairing capability and preparation method thereof

A proton exchange membrane, self-healing technology, applied in the field of proton exchange membrane with self-healing ability and its preparation, can solve problems such as the failure of proton exchange membrane materials, achieve restoration of initial mechanical and other properties, prolong service life, and optimistic application Foreground effect

Inactive Publication Date: 2015-11-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a proton exchange membrane with self-healing ability and its preparation method to solve the problem that the proton exchange membrane material fails after being mechanically damaged

Method used

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  • Proton exchange membrane having self-repairing capability and preparation method thereof
  • Proton exchange membrane having self-repairing capability and preparation method thereof
  • Proton exchange membrane having self-repairing capability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of self-repairing proton exchange membrane: 0.5g polyvinyl alcohol (PVA-124) dissolved in 20ml 70 o C deionized water, add 0.5g sulfosuccinic acid after cooling to room temperature, stir evenly, at 50 o Scrape the glass plate under C, and form a film after drying.

[0025] Self-repair conditions: Take the damaged film, drop a drop of deionized water on the damaged place, leave it at room temperature for 24 hours and then dry, the repair is complete.

Embodiment 2

[0027] Preparation of self-repairing proton exchange membrane: 0.3g of chitosan was dissolved in 20ml of about 4% acetic acid solution, and an alcohol solution containing 0.7g of Nafion was added at room temperature. After stirring at room temperature for 1 hour, it was poured into the flat membrane frame. o Dry film under C.

[0028] Self-repair conditions: Take the damaged film, drop a drop of deionized water on the damaged place, leave it at room temperature for 24 hours and then dry, the repair is complete.

Embodiment 3

[0030] Preparation of 2,2’-bisfuranyl-5,5’-benzimidazole: Add 2.1643g of diaminobenzidine to 40ml of dry dioxane, and after dissolving in N 2 Under protection, add 40ml of dioxane solution with 2.6376g of furoyl chloride dissolved in an ice water bath. After half an hour of dripping, return to normal temperature and continue the reaction for 30 minutes. Then, 2.9266 g of boron trifluoride ether complex and another 80 ml of dioxane were added. The mixture was refluxed for 3 hours, the obtained product was poured into cold water, stirred overnight, filtered with suction and washed with ethanol and water several times to obtain the product.

[0031] Preparation of self-repairing proton exchange membrane: Dissolve the 2,2'-bisfuranyl-5,5'-benzimidazole prepared above in 30ml of DMF, and then add 0.3771g of N,N'-hexamethylene Maleimide, 0.26g anhydrous phosphoric acid, stir evenly and pour into the glass film frame at 60 o Dry film under C.

[0032] Self-repair conditions: place the da...

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Abstract

The invention belongs to the technical field of polymer composite materials and functional materials, and in particular relates to a proton exchange membrane having the self-repairing capability and a preparation method thereof. The proton exchange membrane disclosed by the invention is mainly composed of two components including a self-repairing material and a proton conducting material, wherein the self-repairing material comprises, but not limited to, polyvinyl alcohol, chitosan, a poly(vinyl furfural) / bismaleimide cross-linked polymer and the like; and the proton conducting material comprises, but not limited to, phosphoric acid, sulphuric acid, sulfosuccinic acid, sulfomalic acid, perfluorinated sulfonic acid resin, sulfonated polybenzimidazole, sulfonated polyether-ether-ketone, sulfonated polyimide and the like. The two components form the membrane by using the existing process after being composited through the methods, such as a blending method, a copolymerizing method and an interpenetrating polymer network method; the membrane has good proton conducting capability and self-repairing capability; after the membrane is damaged, self-repairing can be realized under the excitations of water infiltration, temperature increasing / decreasing circulation and the like; therefore, the service life of the proton exchange membrane is prolonged; the use range of the proton exchange membrane is enlarged; and the proton exchange membrane disclosed by the invention can be used in the fields of fuel cells, ion exchange, catalysts and the like.

Description

Technical field [0001] The invention belongs to the technical field of polymer composite materials and functional materials, and specifically relates to a proton exchange membrane with self-repairing ability and a preparation method thereof. Background technique [0002] In recent years, due to the urgent demand for new energy sources, proton exchange membrane fuel cells have received a lot of attention and have made considerable progress. The perfluorosulfonic acid proton exchange membrane represented by Nafion of the United States DuPont Company has proved to the world the unlimited prospects of this proton exchange membrane fuel cell in actual use. [0003] In addition to the requirements for the proton exchange capacity of the material, the proton exchange membrane also requires a certain strength. This is because the inevitable mechanical damage will be encountered during the use of the membrane, especially when the membrane is swollen by water or other liquids. , It will cau...

Claims

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Application Information

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IPC IPC(8): H01M8/10C08J5/22
CPCC08J5/2212C08J5/2231C08J5/2256H01M8/1018H01M2008/1095Y02E60/50
Inventor 浦鸿汀夏牧寒
Owner TONGJI UNIV
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