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Polyarylether anion-exchange membrane material containing n-spirocyclic quaternary ammonium salt group in side chain and preparation method thereof

A technology of anion exchange membrane and spirocyclic quaternary ammonium salt, which is applied in the field of polyarylether anion exchange membrane materials and its preparation, and can solve the problems of reducing ion conductivity and losing cationic groups in polymer chains

Active Publication Date: 2021-05-25
青岛豪恩新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that quaternary ammonium cations are susceptible to OH under high temperature alkaline conditions - Nucleophilic attack, rearrangement or degradation occurs, the polymer chain loses cationic groups and reduces ion conductivity

Method used

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  • Polyarylether anion-exchange membrane material containing n-spirocyclic quaternary ammonium salt group in side chain and preparation method thereof
  • Polyarylether anion-exchange membrane material containing n-spirocyclic quaternary ammonium salt group in side chain and preparation method thereof
  • Polyarylether anion-exchange membrane material containing n-spirocyclic quaternary ammonium salt group in side chain and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Under the condition of high-purity nitrogen protection, 6.4198g (0.0300mol) of 3,4-dimethylphenylhydroquinone, hexafluorobisphenol A6 .7175g (0.0200mol), 4,4-difluorobenzophenone 10.8885g (0.0500mol), sulfolane 57mL (solid content 25%), toluene 25mL and potassium carbonate 7.5824g (0.055mol), reacted at 140°C for 5 hours, then distilled toluene, raised the temperature to 210°C to continue the reaction, observed the change of the viscosity of the system, and stopped the reaction after the viscosity of the system increased sharply. The polymerized reaction product was discharged in distilled water, boiled and washed 9 times repeatedly with distilled water, and dried in an oven for 48 hours to obtain a polyaryletherketone polymer containing hexafluorobisphenol A in the main chain and containing methylphenyl in the side chain (X=0.6, Y=0.4), the yield was 98%.

Embodiment 2

[0046] Under the protection of high-purity nitrogen, 5.0000 g (11.3430 mmol) of polyetheretherketone polymer containing methylphenyl in the side chain and 1,1,2,2-tetra Dissolve 50mL of ethyl chloride, add 1.4537g (8.1670mmol) of N-bromosuccinimide and 0.1976g (0.8167mmol) of dibenzoyl peroxide, heat up to 70°C under nitrogen protection, and react for 10 hours , the polymerization reaction product was precipitated in absolute ethanol, crushed, heated and refluxed with absolute ethanol for 9 times, and dried in an oven for 48 hours to obtain the main chain containing hexafluorobisphenol A side chain containing bromomethylphenyl polyarylether Ketone polymer (X=0.6, Y=0.4), yield 95%.

Embodiment 3

[0048] Add 2.5000 g (4.7405 mmol) of bromomethylphenyl polyetheretherketone polymer and 250 mL of N, N-dimethylformamide into a 500 mL three-necked flask equipped with mechanical stirring and nitrogen protection device, and dissolve N, 473uL (2.8443mmol) of N-diisopropylethylamine and 236uL (2.8443mmol) of tetrahydropyrrole were dissolved in 3mL of N,N-dimethylformamide, placed in a constant pressure dropping funnel and slowly added dropwise to the bromine-containing In the N,N-dimethylformamide solution of methylphenyl polyetheretherketone polymer, stir for 30 minutes, then heat up to 60°C, react for 12 hours, filter, cast and lay a film on a glass plate, dry the film Immerse in 1M NaOH aqueous solution, place at room temperature for 48 hours, take out the film, wash in deionized water until neutral, store in deionized water, and obtain the main chain containing hexafluorobisphenol A side chain containing five-membered N-spiro ring quaternary ammonium salt The polyaryletherke...

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Abstract

The invention discloses a polyarylether anion-exchange membrane material with N-spirocyclic quaternary ammonium salt groups in its side chain and a preparation method thereof, belonging to the technical field of polymer materials and preparation thereof. The present invention firstly synthesizes side chain-containing bisphenol monomer 3,4-dimethylphenyl hydroquinone, and then carries out polycondensation reaction of the monomer with difluoro end-group monomer and non-methylphenyl bisphenol The polyether ether ketone polymer containing methyl phenyl in the side chain is prepared by brominating two methyl groups on the benzene ring of the side chain, quaternizing with hexahydropyrrole, piperidine or hexamethyleneimine, The anion exchange membrane material applicable to alkaline fuel cells is obtained through alkalization and water washing processes. The film material prepared by the present invention contains rigid group phenyl group, flexible group ether bond and N-spiro ring quaternary ammonium salt group, and can have good thermal stability, mechanical properties, alkali resistance stability and higher Ionic conductivity, has good development prospects.

Description

technical field [0001] The invention belongs to the technical field of polymer materials and their preparation, in particular to a polyarylether anion-exchange membrane material with N-spirocyclic quaternary ammonium salt groups in its side chain and a preparation method thereof. Background technique [0002] In order to get rid of the current crisis of energy shortage and environmental pollution, strengthen the development of clean energy and renewable energy, and start to promote new energy technologies. The core of fuel cell technology is to convert primary energy into secondary energy efficiently and without pollution. A fuel cell is an efficient and clean power generation device that converts chemical energy stored in fuel and oxidant into electricity directly through chemical reactions. Polymer electrolyte fuel cells stand out for their small size, high functional density, and short start-up time, mainly including proton exchange fuel cells and anion exchange fuel cel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/40
CPCY02E60/50
Inventor 赵成吉么丹魏彤辉尚丽超那辉
Owner 青岛豪恩新材料科技有限公司
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