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Branched sulfonated polyaryletherketone containing benzoxazole ring side group, preparation method and application thereof

A technology of sulfonated polyaryl ether ketone and benzoxazole ring, applied in the field of polymer chemistry, can solve the problems of reduced antioxidant stability, shortened membrane material life, increased fuel permeability, etc., and achieves good proton conduction rate, good dimensional stability, and high oxidative stability

Inactive Publication Date: 2014-03-19
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the sulfonated polyaryletherketone material with a high degree of sulfonation swells severely when it encounters water, which reduces the mechanical properties of the material, reduces the oxidation resistance stability, increases the fuel transmission rate, and greatly reduces the life of the membrane material.

Method used

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  • Branched sulfonated polyaryletherketone containing benzoxazole ring side group, preparation method and application thereof
  • Branched sulfonated polyaryletherketone containing benzoxazole ring side group, preparation method and application thereof
  • Branched sulfonated polyaryletherketone containing benzoxazole ring side group, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] In a three-necked flask equipped with a mechanical stirrer, a water dispenser, a thermometer, a condenser tube, and nitrogen protection, add 0.04mol of tetramethylbiphenol, 0.06mol of diallyl bisphenol A, and 0.05mol of 4 ,4'-difluorobenzophenone, 0.04mol of 3,3'-sodium disulfonate-4,4'-difluorobenzophenone, 0.01mol of 1,3,5-trifluorophenylcarbonylbenzene, with 0.12mol of potassium carbonate is used as a salt-forming agent, dimethylformamide is used as a solvent, toluene is used as a water-carrying agent, and the solid content is 20%. Bring water at 120°C for 3 hours, then distill off the toluene, raise the temperature to 150°C and continue the reaction for 10 hours. After the reaction was complete, the mixture was introduced into distilled water to form a light yellow strip solid, which was pulverized into a fine powder with a pulverizer, washed 5 times with acetone, and then washed 5 times with distilled water. Dry it in an oven at 80°C to obtain a sulfonated polyary...

Embodiment 2

[0028] In a three-neck flask equipped with a mechanical stirrer, a water dispenser, a thermometer, a condenser tube, and nitrogen protection, add 0.08 mol of hexafluorobisphenol A, 0.02 mol of diallyl bisphenol A, and 0.045 mol of 4,4 '-Difluorobenzophenone, 0.05 mol of 3,3'-sodium disulfonate-4,4'-difluorobenzophenone, 0.005 mol of 1,3,5-trifluorophenylcarbonylbenzene, 0.12 mol Potassium carbonate is used as a salt-forming agent, dimethylacetamide is used as a solvent, toluene is used as a water-carrying agent, and the solid content is 20%. Bring water at 130°C for 3 hours, then distill off the toluene, raise the temperature to 160°C and continue the reaction for 8 hours. After the reaction was complete, the mixture was introduced into distilled water to form a light yellow strip solid, which was pulverized into a fine powder with a pulverizer, washed 5 times with acetone, and then washed 5 times with distilled water. Dry it in an oven at 80°C to obtain a sulfonated polyaryl...

Embodiment 3

[0031]In a three-necked flask equipped with a mechanical stirrer, a water dispenser, a thermometer, a condenser tube, and nitrogen protection, add 0.02mol of bisphenol A, 0.08mol of diallyl bisphenol A, and 0.005mol of 4,4'- Difluorobenzophenone, 0.08mol of 3,3'-sodium disulfonate-4,4'-difluorobenzophenone, 0.015mol of 1,3,5-trifluorophenylcarbonylbenzene, 0.12mol of carbonic acid Potassium is used as a salt-forming agent, N-methylpyrrolidone is used as a solvent, toluene is used as a water-carrying agent, and the solid content is 20%. Bring water at 140°C for 3 hours, then distill off the toluene, raise the temperature to 170°C and continue the reaction for 6 hours. After the reaction was complete, the mixture was introduced into distilled water to form a light yellow strip solid, which was pulverized into a fine powder with a pulverizer, washed 5 times with acetone, and then washed 5 times with distilled water. Dry it in an oven at 80°C to obtain a sulfonated polyaryletherk...

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Abstract

Belonging to the field of high polymer materials, the invention relates to branched sulfonated polyaryletherketone containing a benzoxazole ring side group, a preparation method and application thereof. The method includes: firstly conducting a nucleophilic polycondensation reaction, taking trifunctional 1, 3, 5-trifluorobenzene carbonylbenzene as a branching unit to prepare allyl-containing branched sulfonated polyaryletherketone of different sulfonation degrees and different branching degrees, and then introducing a benzoxazole ring into the side group position of the polymer. The branched sulfonated polyaryletherketone polymer film containing the benzoxazole ring side group provided by the invention has good dimensional stability, low methanol permeability, high oxidation stability and good proton conductivity, thus being able to satisfy the requirements of a fuel cell proton exchange membrane.

Description

technical field [0001] The invention belongs to the field of macromolecular chemistry, and in particular relates to a branched sulfonated polyaryletherketone containing benzoxazole ring side groups used for fuel cell proton exchange membrane materials and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell (PEMFC), due to the use of polymer membrane material as a solid electrolyte, has the advantages of low temperature start-up, no electrolyte leakage, high energy conversion rate, long life, low pollution, etc., and is recognized as the most promising military , electric vehicles, aerospace and other fields of choice. As the core component of PEMFC, its structural design and fabrication have received extensive attention. [0003] Due to its chemical structure, polyaryletherketone has high hygrothermal stability and excellent mechanical properties. The introduction of sulfonic acid groups into the main chain of polyaryletherketone ...

Claims

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Application Information

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IPC IPC(8): C08G65/48C08G65/40C08J5/22H01M8/10H01M8/02H01M8/1025
CPCY02E60/523Y02E60/50
Inventor 王策李野刘新才王喜涛谢敏梁源
Owner JILIN UNIV
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