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Sulfonated polyaryl ether sulfone copolymer containing pyridine group, preparation method and application

A technology for sulfonating polyarylethersulfone and pyridine groups, which is used in electrochemical generators, fuel cells, electrical components, etc., can solve the problem that the water content of proton conductivity cannot meet the requirements of use, mechanical properties decline, and service life is reduced. problem, to achieve the effect of good application prospects, high antioxidant stability, and low methanol permeability

Active Publication Date: 2019-03-22
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for sulfonated polyarylethersulfone membrane materials, when the degree of sulfonation is high, the membrane will absorb a large amount of water and swell or even dissolve excessively, resulting in severe methanol penetration, decreased mechanical properties, and reduced service life.
When the degree of sulfonation is low, the proton conductivity and the water content in the membrane cannot meet the requirements of use.

Method used

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  • Sulfonated polyaryl ether sulfone copolymer containing pyridine group, preparation method and application
  • Sulfonated polyaryl ether sulfone copolymer containing pyridine group, preparation method and application
  • Sulfonated polyaryl ether sulfone copolymer containing pyridine group, preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0023] Add 0.1mol bisphenol A, 0.02mol 2,3-dichloropyridine, 0.03mol 4,4'-dichlorobis Phenylsulfone, 0.05mol 3,3'-sodium disulfonate-4,4'-dichlorodiphenylsulfone, with 1.05mol potassium carbonate as salt-forming agent, dimethylformamide as solvent, and toluene as water water-carrying agent at 120°C for 3 hours, then evaporate the water-carrying agent, then raise the temperature to 140°C to continue the reaction for 20 hours; after the reaction is complete, pour the mixture into distilled water to obtain a light yellow strip solid, which is crushed into fine powder and used Washing with acetone for 3 times, and then washing with distilled water for 3 times; finally drying at 60°C to obtain a sulfonated polyarylethersulfone copolymer containing pyridine groups with a sulfonation degree of 1.0.

Embodiment 2

[0025] Add 0.1mol hexafluorobisphenol A, 0.03mol 2,4-dichloropyridine, 0.03mol 4,4'-di Chlorodiphenylsulfone, 0.04mol 3,3'-sodium disulfonate-4,4'-dichlorodiphenylsulfone, with 1.1mol sodium carbonate as salt-forming agent, dimethylacetamide as solvent, xylene It is a water-carrying agent; carry water at 120°C for 4 hours, then steam the water-carrying agent, and then raise the temperature to 150°C to continue the reaction for 16 hours; after the reaction is complete, pour the mixture into acetone to obtain a light yellow strip solid, which is crushed into fine After powdering, it was washed 5 times with acetone, and then 5 times with distilled water; finally, it was dried at 80°C to obtain a sulfonated polyaryl ether sulfone copolymer containing pyridine groups with a sulfonation degree of 0.8.

Embodiment 3

[0027] Add 0.1mol hydroquinone, 0.01mol 2,5-dichloropyridine, 0.02mol 4,4'-dichloropyridine to a three-necked flask equipped with a mechanical stirrer, a water dispenser, a thermometer, a condenser tube, and nitrogen protection Diphenylsulfone, 0.06mol 3,3'-sodium disulfonate-4,4'-dichlorodiphenylsulfone, with 1.2mol potassium carbonate as salt-forming agent, N-methylpyrrolidone as solvent, toluene as band Aqueous agent: add water at 130°C for 5 hours, then steam the agent with water, then raise the temperature to 170°C and continue to react for 14 hours; after the reaction is complete, pour the mixture into distilled water to obtain a light yellow strip solid, which can be crushed into fine powder Washing with acetone for 4 times and distilled water for 4 times; finally drying at 70°C to obtain a sulfonated polyaryl ether sulfone copolymer containing pyridine groups with a sulfonation degree of 1.2.

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Abstract

The invention belongs to the field of high polymer materials and particularly relates to sulfonated polyarylether sulfone containing a pyridine group and a preparation method of the sulfonated polyarylether sulfone. According to the preparation method, dichloropyridine such as 3,5-dichloropyridine is taken as a monomer, and the feeding proportion of sulfonated monomers to non-sulfonated monomers is adjusted, so as to prepare polyarylether sulfone with different sulfonating degrees by virtue of nucleophilic condensation polymerization; and meanwhile, the feeding proportion of pyridine monomers is adjusted, so as to prepare sulfonated polyarylether sulfone with different pyridine content. A sulfonated polyarylether sulfone copolymer film containing the pyridine group has good dimensional stability, chemical stability and alcohol-rejecting ability and further has potential application prospect in the field of fuel cell polymer electrolyte membranes.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a pyridine group-containing sulfonated polyaryl ether sulfone copolymer and a preparation method thereof, and the invention also relates to the preparation of the pyridine group-containing sulfonated polyarylether sulfone copolymer application. Background technique [0002] Polyelectrolyte membrane fuel cells have the advantages of fast start-up speed, high specific energy, safety and portability, and are considered to be reliable energy devices in electric vehicles, portable power supplies, and stationary power stations. According to the working principle of the fuel cell, the polyelectrolyte membrane needs to have the ability to isolate fuel and oxygen, isolate electrons and conduct protons, and at the same time require it to have good dimensional stability, mechanical properties, thermal stability and oxidation resistance. At present, the widely used and commercia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G75/23H01M8/1027
CPCC08G75/23H01M8/1027Y02E60/50
Inventor 李野芦艾耿呈祯余凤湄张倩孙素明
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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