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Preparation method of novel sulfur-containing polybenzimidazole proton exchange membrane

A technology of polybenzimidazole and proton exchange membrane, which is applied to the preparation of sulfur-containing polybenzimidazole proton exchange membrane, the preparation of sulfur-containing polybenzimidazole resin, and the field of high temperature proton exchange membrane material, which can solve the problem of increasing the brittleness of polymers. and other problems, to achieve the effects of slowing the loss of phosphoric acid, improving the ability to resist free radical oxidation, and excellent solubility

Active Publication Date: 2016-08-24
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the introduction of the thioether structure in the form of free copolymerization tends to increase the brittleness of the resulting polymer, which brings a lot of inconvenience to the later application of the film.

Method used

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  • Preparation method of novel sulfur-containing polybenzimidazole proton exchange membrane
  • Preparation method of novel sulfur-containing polybenzimidazole proton exchange membrane
  • Preparation method of novel sulfur-containing polybenzimidazole proton exchange membrane

Examples

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Embodiment 1

[0019] A kind of sulfur-containing polybenzimidazole proton exchange membrane, its preparation method is as follows:

[0020] A. Preparation of pyridyl-containing oligomers: the solvent used is polyphosphoric acid, the range of the feed ratio of the monomer raw material biphenyltetramine and pyridinedicarboxylic acid is 1.06:1, and the mass concentration range of the monomer in the solvent is 5%. , Microwave-assisted heating program temperature rise polymerization, after the reaction, pour the reaction liquid into water, after the polyphosphoric acid is fully hydrolyzed, neutralize and wash with water to obtain the corresponding oligomers for later use;

[0021] B. Preparation of thioether structure oligomers: the solvent used is polyphosphoric acid, the feed ratio range of the monomer raw material biphenyltetramine and dimethyl 3-thia adipate is 1.06:1, and the monomer is in the solvent The mass concentration range is 5%, microwave-assisted heating program temperature rise po...

Embodiment 2

[0027] A kind of sulfur-containing polybenzimidazole proton exchange membrane, its preparation method is as follows:

[0028] A. Preparation of pyridyl-containing oligomers: the solvent used is polyphosphoric acid, the range of the feed ratio of the monomer raw material biphenyltetramine and pyridinedicarboxylic acid is 1.25:1, and the mass concentration range of the monomer in the solvent is 8%. , Microwave-assisted heating program temperature rise polymerization, after the reaction, pour the reaction liquid into water, after the polyphosphoric acid is fully hydrolyzed, neutralize and wash with water to obtain the corresponding oligomers for later use;

[0029] B. Preparation of thioether structure oligomers: the solvent used is polyphosphoric acid, the feed ratio range of the monomer raw material biphenyltetramine and dimethyl 3-thia adipate is 1.25:1, and the monomer is in the solvent The mass concentration range is 8%, microwave-assisted heating program temperature rise poly...

Embodiment 3

[0035] A kind of sulfur-containing polybenzimidazole proton exchange membrane, its preparation method is as follows:

[0036] A. Preparation of pyridyl-containing oligomers: the solvent used is polyphosphoric acid, the range of the feed ratio of the monomer raw material biphenyltetramine and pyridinedicarboxylic acid is 1.14:1, and the mass concentration range of the monomer in the solvent is 6%. , Microwave-assisted heating program temperature rise polymerization, after the reaction, pour the reaction liquid into water, after the polyphosphoric acid is fully hydrolyzed, neutralize and wash with water to obtain the corresponding oligomers for later use;

[0037] B. Preparation of oligomers containing thioether structures: the solvent used is polyphosphoric acid, the feed ratio range of the monomer raw material biphenyltetramine and dimethyl 3-thia adipate is 1.14:1, and the monomer is in the solvent The mass concentration range of the polyphosphoric acid is 6%, and microwave-a...

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Abstract

The invention provides a preparation method of sulfur-containing polybenzimidazole resin with relatively good overall performance. The resin is taken as a high-temperature proton exchange membrane material. The sulfur-containing polybenzimidazole proton exchange membrane material provided by the invention is represented as sPBI and is obtained by processing sulfur ether structure-containing polybenzimidazole block copolymer resin through a solution casting method. The polybenzimidazole block copolymer resin can be obtained by copolymerization of two oligomer chain segments employing amino as end groups and 4,4'-(2,3-quinoxalylene)2-benzoic acid dimethyl ester. A fuel cell performance test is carried out on the obtained proton exchange membrane, so that the proton conductivity reaches 50-70mS / cm; and the anti-free radical oxidation stability is improved by 5-8 times in comparison with that of an ordinary PBI membrane.

Description

technical field [0001] The present invention relates to a preparation method of a sulfur-containing polybenzimidazole proton exchange membrane, in particular to a preparation method of a sulfur-containing polybenzimidazole resin, and the use of the sulfur-containing block copolymer for high-temperature proton exchange membrane materials , belonging to the field of polymer materials and fuel cell technology. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is an efficient and environmentally friendly power generation device, which has broad application prospects in electric vehicles and mobile portable devices. Generally speaking, a proton exchange membrane fuel cell with an operating temperature of 100-200°C is called a high-temperature proton exchange membrane fuel cell. The relatively high operating temperature makes it have the advantages of simple water and heat management, low fuel purity requirements, and high electrode reaction efficiency. adv...

Claims

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Application Information

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IPC IPC(8): H01M8/103H01M8/1032H01M8/1069H01M8/1072C08G73/18
CPCC08G73/18H01M8/103H01M8/1032H01M8/1069H01M8/1072H01M2008/1095Y02E60/50
Inventor 汪中明袁泉韩克飞于书平朱红
Owner BEIJING UNIV OF CHEM TECH