A polyphenylene ether type anion exchange membrane loaded with tetraamino quaternary phosphonium cation units and its preparation method

A technology of tetraamino quaternary and phosphonium cations, applied in electrical components, electrochemical generators, fuel cells, etc. Structure, not involved in anion exchange membrane research and other issues

Active Publication Date: 2020-10-27
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technology disclosed in the Chinese patent (application number CN201310288536.3) shows that the preparation of a tetrakis (diethylamino) quaternary phosphonium cation is to first generate a phosphoroimide intermediate, and then react with a halogenated hydrocarbon to generate a quaternary phosphonium Cationic and does not have a spiro ring structure, belongs to the technical field of preparation of quaternary phosphonium cationic compounds, and does not involve related research on anion exchange membranes
[0011] The above documents or patents do not involve the research of grafted tetraamino quaternary phosphonium cation polyphenylene ether type anion exchange membrane

Method used

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  • A polyphenylene ether type anion exchange membrane loaded with tetraamino quaternary phosphonium cation units and its preparation method
  • A polyphenylene ether type anion exchange membrane loaded with tetraamino quaternary phosphonium cation units and its preparation method
  • A polyphenylene ether type anion exchange membrane loaded with tetraamino quaternary phosphonium cation units and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Dissolve 1.9 g of brominated polyphenylene ether in 5 ml of chlorobenzene, add 0.1 g of an alkyl-substituted organic phosphine monomer shown in formula (2), and stir at room temperature for 5 hours to obtain a brown polyphenylene ether containing grafted quaternary phosphonium cations. solution; wherein m in the main chain of brominated polyphenylene ether is 0.55, wherein the values ​​of x and y in the organic phosphine monomer are all 1, R 1 is methyl, R 2 and R 3 For n-hexyl.

[0039] Pour the obtained brown solution onto a clean and dry glass plate, and dry it at 60°C to form a film;

[0040] Soak the membrane in 1M NaOH solution for 48h for OH - For ion exchange, use deionized water to wash off the remaining NaOH on the surface of the membrane, and measure the ion exchange capacity by back titration to calculate the substitution ratio of quaternary phosphonium cations. For the NMR phosphorus spectrum of anion exchange membrane, see figure 1 , the thermogravimet...

Embodiment 2

[0042]Dissolve 1.8g of brominated polyphenylene ether in 5ml of chlorobenzene, add 0.2g of an alkyl-substituted organic phosphine monomer shown in formula (2), and stir for 5 hours at room temperature to obtain a brown polyphenylene ether containing grafted quaternary phosphonium cations. solution; wherein m in the main chain of brominated polyphenylene ether is 0.55, wherein the values ​​of x and y in the organic phosphine monomer are all 1, R 1 is methyl, R 2 and R 3 For n-hexyl.

[0043] The obtained brown solution was poured on a clean and dry glass plate, and dried at 60°C to form a film;

[0044] Soak the membrane in 1M NaOH solution for 48h for OH - For ion exchange, the remaining NaOH on the surface of the membrane was washed with deionized water, and the ion exchange capacity was measured by back titration to calculate the substitution ratio of quaternary phosphonium cations. The anion exchange membrane with 10% organic phosphine monomer was named BPPO-MTAQP-10%, ...

Embodiment 3

[0046] Dissolve 1.7g of brominated polyphenylene ether in 5ml of chlorobenzene, add 0.3g of an alkyl-substituted organic phosphine monomer shown in formula (2), and stir for 5 hours at room temperature to obtain a brown polyphenylene ether containing grafted quaternary phosphonium cations. solution; wherein m in the main chain of brominated polyphenylene ether is 0.55, wherein the values ​​of x and y in the organic phosphine monomer are all 1, R 1 is methyl, R 2 and R 3 For n-hexyl.

[0047] The obtained brown solution was poured on a clean and dry glass plate, and dried at 60°C to form a film;

[0048] Soak the membrane in 1M NaOH solution for 48h for OH - For ion exchange, the remaining NaOH on the surface of the membrane was washed with deionized water, and the ion exchange capacity was measured by back titration to calculate the substitution ratio of quaternary phosphonium cations. The anion-exchange membrane with an organic phosphine monomer feeding ratio of 15% was n...

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Abstract

The invention provides a polyphenyl ether type anion exchange membrane supported with a tetra-amino quaternary phosphonium cation unit and a preparation method of the polyphenyl ether type anion exchange membrane, and belongs to the technical field of the anion exchange membrane for a fuel cell. The anion exchange membrane is a polyphenyl ether material containing the tetra-amino quaternary phosphonium cation unit, and the structure is represented as formula (I). The polyphenyl ether type anion exchange membrane supported with the tetra-amino quaternary phosphonium cation unit is prepared in steps as follows: a tetra-amino organic phosphine monomer containing nitrogen and phosphorus double bonds is subjected to a reaction with brominated polyphenyl ether, a polyphenyl ether material supported with tetra-amino quaternary phosphonium cations is obtained, a membrane is formed in a die finally, and the polyphenyl ether type anion exchange membrane is obtained by ion exchange. The polyphenyl ether type anion exchange membrane supported with the tetra-amino quaternary phosphonium cations is not involved with quaternary ammonium, imidazole and other groups utilized by most anion exchangemembranes, the problem about degradation in a strong base environment is solved, and the polyphenyl ether type anion exchange membrane has the advantages of high ionic conductance and good alkali stability.

Description

technical field [0001] The invention belongs to the technical field of anion exchange membranes for fuel cells. In particular, it relates to a polyphenylene ether type anion exchange membrane grafted with tetraamino quaternary phosphonium cation units and a preparation method thereof. Background technique [0002] With the gradual depletion of energy resources and the increasingly severe environmental pollution, it is imminent to develop energy with high efficiency and environmental protection. In recent years, fuel cells have entered people's field of vision as a new type of power equipment and have been widely valued. Fuel cells can use clean and renewable energy such as hydrogen and methanol to generate electricity through oxidation-reduction reactions at the cathode and anode. The resulting products are water and carbon dioxide, which avoids environmental pollution. Anion exchange membrane fuel cell is a kind of fuel cell with application prospect, which has been exten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/48H01M8/1025
CPCC08G65/485H01M8/1025Y02E60/50
Inventor 汪中明孙雯雯韩克飞朱红
Owner BEIJING UNIV OF CHEM TECH
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