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A kind of polymer containing azacrown ether structure and its preparation method and application

An azacrown ether and polymer technology, which is applied in the field of anion exchange membranes containing azacrown ether structures and their preparation, can solve the problems that do not involve the research on azacrown ether polyphosphazene anion exchange membranes, etc. Excellent alkali stability, high ionic conductivity and excellent alkali resistance

Active Publication Date: 2020-05-19
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, these documents or patents do not relate to the research on loading azacrown ether polyphosphazene anion exchange membranes.

Method used

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  • A kind of polymer containing azacrown ether structure and its preparation method and application
  • A kind of polymer containing azacrown ether structure and its preparation method and application
  • A kind of polymer containing azacrown ether structure and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take 6.14g of the hydroxy crown ether structure (z=1, m=3) represented by formula (2) and 1.2eq of sodium metal into 1,4-dioxane, heat to 60°C, and react for 24h. Then cool to room temperature, and suction filter to obtain a 1,4-dioxane solution of crown ether sodium salt;

[0041] Add the 1,4-dioxane solution of the above-mentioned crown ether sodium salt into a THF solution containing 23.2g of polydichlorophosphazene, and react at 60°C for 48h;

[0042] Add 33.44g of unsubstituted n-amyl alcohol and 1.2eq of metal sodium into THF, react at room temperature for 4h, and then filter with suction to obtain a THF solution of n-amyl alcohol sodium salt;

[0043] Add the obtained THF solution of fatty alcohol sodium salt into the above solution, continue to react for 24 h, then cool to room temperature, concentrate the obtained reaction solution to obtain a viscous liquid, wash with deionized water, and obtain a light yellow elastomer;

[0044] Dissolve the resulting elasto...

Embodiment 2

[0047]Take 18.42g of the hydroxy crown ether structure (z=1, m=3) represented by formula (2) and 1.2eq of sodium metal into 1,4-dioxane, heat to 60°C, and react for 24h. Then cool to room temperature, and suction filter to obtain a 1,4-dioxane solution of crown ether sodium salt;

[0048] Add the 1,4-dioxane solution of the above-mentioned crown ether sodium salt into a THF solution containing 23.2g of polydichlorophosphazene, and react at 60°C for 48h;

[0049] Add 29.92g of unsubstituted n-amyl alcohol and 1.2eq of metal sodium into THF, react at room temperature for 4h, and then filter with suction to obtain a THF solution of n-amyl alcohol sodium salt;

[0050] Add the obtained THF solution of fatty alcohol sodium salt into the above solution, continue to react for 24 hours, then cool to room temperature, concentrate the obtained reaction solution to obtain a viscous liquid, wash with deionized water, and obtain a light yellow elastomer;

[0051] Dissolve the resulting el...

Embodiment 3

[0054] Take 30.7g of the hydroxy crown ether structure (z=1, m=3) represented by formula (2) and 1.2eq of sodium metal, add it to 1,4-dioxane, heat to 60°C, and react for 24h. Then cool to room temperature, and suction filter to obtain a 1,4-dioxane solution of crown ether sodium salt;

[0055] Add the 1,4-dioxane solution of the above-mentioned crown ether sodium salt into a THF solution containing 23.2g of polydichlorophosphazene, and react at 60°C for 48h;

[0056] Add 26.4g of unsubstituted n-amyl alcohol and 1.2eq of sodium metal into THF, react at room temperature for 4h, and then filter with suction to obtain a THF solution of n-amyl alcohol sodium salt;

[0057] Add the obtained THF solution of fatty alcohol sodium salt into the above solution, continue to react for 24 hours, then cool to room temperature, concentrate the obtained reaction solution to obtain a viscous liquid, wash with deionized water, and obtain a light yellow elastomer;

[0058] Dissolve the resulti...

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Abstract

The invention relates to a polymer containing an aza-crown ether structure as well as a preparation method and application thereof and belongs to the field of preparation and application of anion-exchange membranes used for fuel cells. A structural formula of the polymer is described in the specification, wherein R is unsubstituted C1-C18 fatty alcohol, values of x, y and z meet conditions that x is less than 2n and more than or equal to 0, y is less than or equal to 2n and more than 0, the sum of x and y is equal to 2n, z is less than 5 and more than or equal to 1, m is less than or equal to 5 and more than or equal to 1, and n is a polymerization degree of polydichlorophosphazene. Aza-crown ether sodium salt with a hydroxyl branched chain and sodium alcoholate react with a polydichlorophosphazene polymer, so that a polyphosphazene compound containing the aza-crown ether structure is obtained; and finally coating and ion exchange are carried out, so that the polymer containing the aza-crown ether structure is obtained. The aza-crown ether supported polyphosphazene anion-exchange membrane provided by the invention does not contain quaternary ammonium and imidazole groups utilized by majority anion-exchange membranes, thereby avoiding the degradation problem in a high temperature and strong alkali environment and having the advantages of high ionic conductivity and excellent alkali resistance.

Description

technical field [0001] The invention belongs to the field of preparation and application of anion exchange membranes for fuel cells, and particularly relates to an anion exchange membrane containing an azacrown ether structure and a preparation method thereof. Background technique [0002] As a highly efficient and clean electrochemical power generation device, fuel cells have received widespread attention at home and abroad in recent years. Among various types of fuel cells, alkaline membrane fuel cells have become a research hotspot in the field of fuel cells in recent years because of their advantages such as high electrode kinetics, low fuel leakage, and high catalyst selectivity. As one of the core components of alkaline membrane fuel cells, the preparation of alkaline anion exchange membranes has become one of the key factors restricting the application of alkaline membrane fuel cells. At present, the research on alkaline membrane at home and abroad is still in the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G79/025H01M4/94
CPCC08G79/025H01M4/94Y02E60/50
Inventor 汪中明汪奎韩克飞朱红
Owner BEIJING UNIV OF CHEM TECH
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