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Polyolefin anion exchange membrane based on block structure and preparation method thereof

An anion-exchange membrane and polyolefin technology, applied in fuel cells, electrochemical generators, electrical components, etc., can solve the problems of uncontrollable distribution of ion-conducting groups, limit ion conductivity, and affect service life, etc., to improve chemical Effects of Stability and Mechanical Strength

Active Publication Date: 2020-02-07
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its post-modification graft modification, the distribution of ion-conducting groups is uncontrollable, which restricts the formation of ion-conducting channels in the membrane and limits its ion conductivity; (Chinese patent, CN 106025316A;) In addition, due to polymerization Due to the heteroatom structure in the main chain of the material, the main chain of most membrane materials will be attacked by hydroxide in an alkaline environment, and the membrane material will be degraded, seriously affecting its service life.

Method used

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  • Polyolefin anion exchange membrane based on block structure and preparation method thereof
  • Polyolefin anion exchange membrane based on block structure and preparation method thereof
  • Polyolefin anion exchange membrane based on block structure and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042](1) Preparation of block structure polyolefin main chain: under inert gas protection, add initiator and 3-methylene-1,6-heptadiene (0.64g 6mmol) in the reaction flask, add 4mL toluene, stir 5min, then add butadiene toluene solution (4mL12mmol) and continue to stir for 10min, methanol solution terminates the reaction, the reaction solution is settled with ethanol, and a solid polymer is precipitated, filtered, washed, and dried; 3-methylene-1,6 - Heptadiene and butadiene copolymer membrane material backbone.

[0043] (2) Preparation of anion exchange membrane based on block structure polyolefin main chain: In a flask, dissolve 3-methylene-1,6-heptadiene and butadiene copolymer (0.1g 0.6mmol) in 5mL In THF, then add nitrogen-containing mercaptopyrrolidine quaternary ammonium salt (0.25g 1.7mmol), under nitrogen condition, airtight reaction system, replace gas three times, under the ultraviolet irradiation of wavelength 365nm, react 20min, stop irradiation 10min, then conti...

Embodiment 2

[0048] (1) Preparation of block structure polyolefin main chain: under inert gas protection, add initiator and 3-methylene-1,6-heptadiene (1.3g 12mmol) in the reaction flask, add 5mL toluene, stir 10min, then add butadiene toluene solution (4mL12mmol) and continue to stir for 20min, ethanol solution terminates the reaction, the reaction solution is settled with acetone, and a solid polymer is precipitated, filtered, washed, and dried; 3-methylene-1,6 - Heptadiene and butadiene copolymer membrane material backbone.

[0049] (2) Preparation of anion exchange membrane based on block structure polyolefin main chain: In a flask, dissolve 3-methylene-1,6-heptadiene and butadiene copolymer (0.1g 0.6mmol) in 5mL In chloroform, add nitrogen-containing mercaptomorpholine quaternary ammonium salt (0.36g 2.5mmol) then, under nitrogen condition, airtight reaction system, displacement gas is three times, under the ultraviolet irradiation of wavelength 365nm, react 30min, stop irradiation 20...

Embodiment 3

[0054] (1) Preparation of block structure polyolefin main chain: under inert gas protection, add initiator and 3-methylene-1,6-heptadiene (2.6g 24mmol) in reaction flask, add 5mL toluene, stir 20min, then add butadiene toluene solution (4mL12mmol) and continue to stir for 30min, propanol solution terminates the reaction, the reaction solution is settled with ether, and a solid polymer is separated out, filtered, washed, and dried; 3-methylene-1, 6-heptadiene and butadiene copolymer film material backbone.

[0055] (2) Preparation of anion exchange membrane based on block structure polyolefin main chain: In a flask, dissolve 3-methylene-1,6-heptadiene and butadiene copolymer (0.1g 0.6mmol) in 5mL In dichloromethane, then add nitrogen-containing mercaptopiperidine quaternary ammonium salt (0.43g 3mmol), under nitrogen condition, airtight reaction system, replace gas three times, under the ultraviolet irradiation of wavelength 365nm, react 40min, stop irradiation 30min, then cont...

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Abstract

The invention discloses a polyolefin anion exchange membrane based on a block structure and a preparation method thereof, and belongs to the technical field of alkaline anion exchange membranes. A polyolefin block main chain membrane material with good solubility and stability is synthesized through a coordination polymerization method, and then a polymer is directly subjected to a click reactionby taking terminal olefinic double bonds of a main chain as grafting sites to introduce nitrogen-containing sulfhydryl groups, and after a quaternization reaction, a hydrogenation reaction, ion exchange and membrane casting are carried out to obtain a 'crystalline-non-crystalline' membrane material. The prepared anion exchange membrane has excellent alkali stability and ion conductivity, and can be applied to alkaline fuel cells.

Description

technical field [0001] The invention belongs to the technical field of basic anion exchange membranes, and relates to a polyolefin anion exchange membrane with a block structure and a preparation method thereof. Background technique [0002] With the increasingly severe global environmental and energy problems, fuel cells, as a new type of power generation device, have attracted widespread attention because of their advantages such as wide range of fuel sources, high efficiency, low or even zero emissions. (Chinese patent, CN105924587A; CN 104861188A;) Alkaline anion exchange membrane fuel cell is a kind of fuel cell. Conducive to water balance, relatively low cost and other advantages. (Ren, X.M.; Price. S.C.; Jackson, A.C.; Pomerantz, N.; Beyer, F.L.ACS Appl. Mater. Interfaces, 2014, 6, 13330-13333.) The advantage of low cost comes from the basic anion exchange membrane fuel Batteries can use non-noble metals as catalysts, which is one of their main advantages. [0003]...

Claims

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Application Information

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IPC IPC(8): C08F293/00C08F8/34H01M8/1041H01M8/1069
CPCC08F8/34H01M8/1041H01M8/1069C08F293/00Y02E60/50
Inventor 潘昱蒋康贺高红焉晓明李文强蒋新新
Owner DALIAN UNIV OF TECH
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