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Star topology polyolefin anion exchange membrane, preparation method and application

An anion exchange membrane, star topology technology, applied in the field of star topology polyolefin anion exchange membrane, preparation field, can solve the problems of uncontrollable distribution of ion conductive groups, affecting service life, limiting ion conductivity, etc., to achieve mechanical The effect of increasing strength, reducing swelling, and promoting microphase separation in the membrane

Active Publication Date: 2020-02-04
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(Chinese patent, CN 106543459A; CN 106432744A;) 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 106268381A;) In addition, due to the heteroatom structure in the polymer main chain, the main chain of most membrane materials will be attacked by hydroxide radicals in an alkaline environment, and the membrane material will be degraded, seriously affecting its service life

Method used

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  • Star topology polyolefin anion exchange membrane, preparation method and application
  • Star topology polyolefin anion exchange membrane, preparation method and application
  • Star topology polyolefin anion exchange membrane, preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0043](1) Synthesis of polyolefin main chain with star topology: inert gas protection, add isoprene (2g 29.3mmol) and 20mL cyclohexane to the reaction flask, add n-butyllithium (40uL 1.6M), stir 6h, add p-methylstyrene (3.45g 29.3mmol), continue to stir for 6h, add divinylbenzene (0.028g 0.21mmol) and stir for 6h, add methanol to stop the reaction; The solid polymer is filtered, washed, and dried; a star-shaped topology polyolefin main chain membrane material is obtained.

[0044] (2) Synthesis of star topology polyolefin anion exchange membrane: In a flask, dissolve 3 g of star topology polyolefin main chain membrane material in 100 ml dimethyl sulfoxide, add Raney nickel catalyst, and react at 120 ° C for 3 Days, ethanol was precipitated, washed with ethanol three times, and vacuum-dried to a constant weight to obtain a membrane material polymer. Dissolve the polymer in dimethyl sulfoxide, add brominated reagent, react for 48 hours, ethanol precipitates, wash with ethanol t...

Embodiment 2

[0049] (1) Synthesis of polyolefin main chain with star topology: inert gas protection, add isoprene (2g 29.3mmol) and 20mL cyclohexane to the reaction flask, add tert-butyllithium (40uL 1.6M), stir 8h, add p-methylstyrene (2.31g 19.5mmol), continue to stir for 8h, add silicon tetrachloride (0.036g 0.21mmol) and stir for 8h, add ethanol to stop the reaction; The solid polymer is filtered, washed, and dried; a star-shaped topology polyolefin main chain membrane material is obtained.

[0050] (2) Synthesis of star topology polyolefin anion exchange membrane: in a flask, dissolve 3 g star topology polyolefin main chain membrane material in 100 ml N-methylpyrrolidone, add palladium carbon catalyst, and react at 120 ° C for 4 days , ethyl acetate was precipitated, washed three times with ethyl acetate, and vacuum-dried to constant weight to obtain a membrane material polymer. Then dissolve the polymer in N-methylpyrrolidone, add a bromine reagent, react for 36 hours, ethyl acetate...

Embodiment 3

[0055] (1) Synthesis of polyolefin main chain with star topology: inert gas protection, add isoprene (2g 29.3mmol) and 20mL cyclohexane to the reaction flask, add n-octyllithium (40uL 1.6M), stir 10h, add p-methylstyrene (1.48g 12.5mmol), continue to stir for 10h, add potassium persulfate (0.057g 0.21mmol) and stir for 10h, add n-propanol to stop the reaction; the reaction solution is settled with ether, The solid polymer is precipitated, filtered, washed, and dried; a star-shaped topology polyolefin main chain membrane material is obtained.

[0056] (2) Synthesis of star topology polyolefin anion exchange membrane: in a flask, dissolve 3 g of star topology polyolefin main chain membrane material in 100 ml dimethylacetamide, add Raney nickel catalyst, and react at 120 ° C for 5 In 1 day, dichloromethane was precipitated, washed with dichloromethane three times, and vacuum-dried to constant weight to obtain a membrane material polymer. Then dissolve the polymer in dimethylacet...

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Abstract

The invention discloses a star topology polyolefin anion exchange membrane, a preparation method and an application thereof, and belongs to the technical field of basic anion exchange membranes. A star topology polyolefin block main chain membrane material with good solubility and stability is synthesized by anionic polymerization. Benzyl sites are brominated by catalytic hydrogenation and a bromination reagent, ionic conductive groups are grafted by Menschutkin reaction to obtain a star topology polyolefin film material, and a membrane is prepared. The prepared membrane has good alkali stability and high ionic conductivity, and can be applied to alkaline fuel cells.

Description

technical field [0001] The invention belongs to the technical field of alkaline anion exchange membranes, and relates to a polyolefin anion exchange membrane with a star topology, a preparation method and an application. 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, CN106410246A; CN 109485885A;) Alkaline anion exchange membrane fuel cell is a kind of fuel cell. Conducive to water balance, relatively low cost and other advantages. (Varcoe, J.R.; Atanassov, P.; Dekel, D.R.; Herring, A.M.; Hickner, M.A.; Kohl, P.A.; Kucernak, A.R.; Musttain, W.E.; Nijmeijer, K.; Scott, K.; Xu, T.W.; Zhuang , L.Energy Environ.Sci., 2014,7,3135–3191.) The advantage of low cost comes from the fact that alkaline anion exchange mem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1023H01M8/1069H01M8/1072H01M8/1086
CPCH01M8/1023H01M8/1069H01M8/1072H01M8/1086H01M2008/1095Y02E60/50
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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