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Crosslinked alkaline anion membrane based on piperidine and preparation method thereof

An alkaline anion and cross-linking technology, applied in fuel cells, electrochemical generators, electrical components, etc., can solve problems such as low conductivity and poor chemical stability, and achieve the goals of improving mechanical strength, inhibiting swelling, and alleviating contradictions Effect

Inactive Publication Date: 2019-04-26
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are still many challenges on the road to the commercialization of alkaline polymer fuel cells. As a key material, alkaline anion exchange membranes have two major problems: low electrical conductivity and poor chemical stability in alkaline environments.

Method used

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  • Crosslinked alkaline anion membrane based on piperidine and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] At room temperature, 2 g of the prepared chloromethylated polysulfone with a functionalization degree of 100 was dissolved in N,N-dimethylformamide to obtain a homogeneous reaction solution. 1.417 g of 4-chloro-1-methylpiperidine was added thereto, and it was made to react at 60 degreeC for 48 hours. After completion of the reaction, precipitation was carried out in ethyl acetate. After stirring at room temperature for 24 hours, suction filtration was carried out. Repeat three times to ensure that the polymer is fully washed.

[0037] Dissolve 0.4 g of the polymer synthesized in the previous step in N,N-dimethylformamide, take it out after dissolving, and centrifuge three times in a centrifuge tube. Take 4 mL of the supernatant and pour it into a film-coated bottle, add 0.072 mL of 1,4-dimethylpiperazine, and react at 80°C for 240 hours to ensure successful substitution.

[0038] The above reaction solution was cast on a glass plate to form a film, and dried at 60°C ...

Embodiment 2

[0042] At room temperature, 2 g of chloromethylated polysulfone prepared with a functionalization degree of 100 was dissolved in N,N-dimethylformamide to obtain a homogeneous reaction solution, and 1.675 g of 1-(2-chloro Ethyl) piperidine hydrochloride, react at 80°C for 36 hours. After completion of the reaction, precipitation was carried out in ethyl acetate. After stirring at room temperature for 24 hours, suction filtration was carried out. Repeat three times to ensure that the polymer is fully washed.

[0043] Dissolve 0.4 g of the polymer synthesized in the previous step in N,N-dimethylformamide, take it out after dissolving, and centrifuge three times in a centrifuge tube. Take 4 mL of the supernatant and pour it into a film-coated bottle, add 0.072 mL of 1,4-dimethylpiperazine, and react at 90°C for 204 hours to ensure successful substitution.

[0044] The above reaction solution was cast on a glass plate to form a film, and dried at 70°C for 24 hours to obtain a cr...

Embodiment 3

[0048] At room temperature, 2 g of chloromethylated polysulfone prepared with a functionalization degree of 90 was dissolved in N,N-dimethylacetamide to obtain a homogeneous reaction solution, and 1.247 g of 4-bromopiperidine hydrogen was added thereto Bromate, react at 100°C for 12 hours. After the reaction was completed, precipitation was carried out in petroleum ether. After stirring at room temperature for 24 hours, suction filtration was carried out. Repeat three times to ensure that the polymer is fully washed.

[0049]Dissolve 0.4 g of the polymer synthesized in the previous step in N,N-dimethylacetamide, and centrifuge three times in a centrifuge tube after dissolution. Take 4mL of the supernatant and pour it into a film-coated bottle, add 0.045g of 4-piperidinylpiperidine, and react at 100°C for 168 hours to ensure successful substitution.

[0050] The above reaction solution was cast on a glass plate to form a membrane, and dried at 80° C. for 12 hours to obtain a...

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Abstract

The invention discloses a novel anion exchange membrane and a preparation method thereof. The anion exchange membrane is prepared by initial reaction of a halomethyl group-containing polymer and haloperidine and binary cross-linking with 1,4-dimethylpiperazine or the like, the benzylic position of the membrane adopts piperidine ions with excellent alkaline stability, and the chemical stability isbetter under alkaline conditions; the polycation can effectively improve the ionic conductivity; the cross-linking not only inhibits swelling, but also maintains flexibility and excellent electrical conductivity of the membrane. The anion membrane exhibits excellent chemical stability, high electrical conductivity, low water absorption and swelling resistance, and is suitable for use in the fieldof alkaline fuel cells.

Description

technical field [0001] The invention belongs to the field of battery membrane materials, and relates to a piperidine-based cross-linked alkaline anion membrane and a preparation method thereof. Background technique [0002] Energy crisis and environmental pollution have become the two most important problems facing today's society. As a new type of clean energy, fuel cells have attracted widespread attention from all over the world. Alkaline polymer fuel cells have achieved rapid development due to their fast reaction kinetics, the use of non-precious metal catalysts, no carbonate crystallization, and low fuel permeability. [0003] However, there are still many challenges on the road to the commercialization of alkaline polymer fuel cells. As a key material, alkaline anion exchange membranes have two major problems: low electrical conductivity and poor chemical stability in alkaline environments. Therefore, how to improve the chemical stability and conductivity of anion me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/103H01M8/1039H01M8/1067H01M8/1072
CPCH01M8/103H01M8/1039H01M8/1067H01M8/1072Y02E60/50
Inventor 张凤祥贾亚斌周芮霆马玲玲李攀月阿克塔
Owner DALIAN UNIV OF TECH
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