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Multi-quaternary ammonium salt type anion exchange membrane and preparation method thereof

A technology of anion exchange membrane and multi-quaternary ammonium salt, which is applied in the direction of anion exchange, ion exchange, chemical instruments and methods, etc., can solve the problems of reducing the physical properties of the membrane, and achieve the elimination of film forming process, low cost and good thermal stability sexual effect

Inactive Publication Date: 2011-12-28
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the radiation grafting reaction, high-dose irradiation can generate more free radicals in the membrane skeleton, increase the grafting rate of monomers on the membrane, and finally increase the number of functional groups on the membrane, but high-dose irradiation can also It will degrade the membrane skeleton and reduce the physical properties of the membrane

Method used

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  • Multi-quaternary ammonium salt type anion exchange membrane and preparation method thereof
  • Multi-quaternary ammonium salt type anion exchange membrane and preparation method thereof
  • Multi-quaternary ammonium salt type anion exchange membrane and preparation method thereof

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Embodiment 1

[0027] (1) Put the ethylene-tetrafluoroethylene copolymer film to remove impurities on the surface of the film and put it into 60 Co gamma ray radiation room irradiated, irradiated to a total dose of 90KGy.

[0028] (2) Submerge the irradiated film in a 60% toluene solution of chloromethylstyrene, pass argon to remove oxygen in the air, seal it, and react in a constant temperature water bath at 60° C. for 4 hours.

[0029] (3) Remove residual monomers and homopolymers in the film, immerse the film in a 2% triethylenediamine solution in toluene, and place it in a water bath at 70° C. for 16 hours.

[0030] (4) Clean the membrane, immerse it in a 2% toluene solution of bis(chloromethyl)benzene, and place it in a water bath at 70° C. for 18 hours.

[0031] (5) The membrane was cleaned, immersed in 33% trimethylamine aqueous solution, and placed in a water bath at 60° C. for 24 hours. A chlorine-type polyquaternary ammonium salt-type anion exchange membrane is obtained. Place t...

Embodiment 2

[0036] (1) Put the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer film to remove the impurities on the surface of the film and put it into a high-energy electron beam radiation chamber for irradiation to a total dose of 120KGy.

[0037] (2) Submerge the irradiated film in 80% dimethyl sulfoxide solution of iodomethylstyrene, pass through nitrogen to remove oxygen in the air, seal it, and react in a constant temperature water bath at 80° C. for 8 hours.

[0038] (3) Remove residual monomers and homopolymers in the film, immerse the film in a 4% tetrahydrofuran solution of triethylenediamine, and place it in a water bath at 70° C. for 16 hours.

[0039] (4) The membrane was cleaned, immersed in 4% bis(chloromethyl)benzene in toluene solution, and placed in a 70° C. water bath for 18 hours of reaction.

[0040] (5) The membrane was cleaned, immersed in 30% triethylamine aqueous solution, and placed in a 40° C. water bath for 36 hours to react to obtain a chlorine-type ...

Embodiment 3

[0043] (1) Remove the impurities on the surface of the polyvinylidene fluoride film and put it in 60 Irradiate in Co gamma ray radiation room, and irradiate to a total dose of 60KGy.

[0044] (2) Submerge the irradiated film in a 50% solution of bromomethylstyrene in tetrahydrofuran, pass argon to remove oxygen in the air, seal it, and react in a constant temperature water bath at 50° C. for 12 hours.

[0045] (3) Residual monomers and homopolymers in the film were removed, the film was immersed in 2% triethylenediamine in toluene solution, and placed in a 50° C. water bath for 17 hours of reaction.

[0046] (4) Clean the membrane, immerse it in a 2% bis(bromomethyl)benzene solution in toluene, and place it in a water bath at 50° C. for 18 hours.

[0047] (5) The membrane was cleaned, immersed in 30% triethylamine aqueous solution, and placed in a water bath at 30° C. for 12 hours. A chlorine-type multi-quaternary ammonium salt-type anion-exchange membrane and a multi-quater...

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Abstract

A multiple quaternary ammonium salt anion exchange membrane and a preparation method thereof relate to an anion exchange membrane. The chemical structure of the multiple quaternary ammonium salt anion exchange membrane is high-molecular polymer with multiple quaternary ammonium salts on side chains. The preparation method comprises the following steps: placing a polymer membrane in an irradiationroom, performing high energy ray irradiation; dipping the polymer membrane after irradiation in a solution with monomer halomethyl styrene for reaction; soaking a membrane obtained in the first grafting reaction in a solution with monomer triethylenediamine for reaction; soaking the membrane after crosslinking quaternarization in a solution with monomer dihalomethyl benzene for reaction; soaking the membrane after the alkylation reaction in a quaternarization reagent for reaction to obtain the product. The prepared anion exchange membrane has high conductivity, good thermal stability, and chemical stability, and is applicable to fields of alkaline anion exchange membrane fuel cells, liquid flow energy storage cells, novel super capacitor, water treatment, metal recovery, etc.

Description

technical field [0001] The invention relates to an anion exchange membrane, in particular to a multi-quaternary ammonium salt type anion exchange membrane prepared by radiation grafting technology. Background technique [0002] Anion-exchange membranes can selectively permeate anions and block the permeation of cations, so they have a wide range of uses, such as diaphragms in electrolytic purification of gold, separation membranes for liquid mixtures, preparation of film-forming electrodes for potentiometric titration analysis, etc. In recent years, The application of anion exchange membrane as a conductive separator in fuel cells, liquid flow energy storage batteries and new supercapacitors has also attracted more and more attention. Chinese patent CN101735471A discloses a method for preparing a homogeneous strongly basic anion-exchange membrane using high-density polyethylene as a base membrane. The anion-exchange membrane prepared by this method has high ion selectivity a...

Claims

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Application Information

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IPC IPC(8): B01D71/78B01D67/00B01J41/12B01J41/13
Inventor 方军杨义旭卢晓焕
Owner XIAMEN UNIV
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