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Ion exchange membrane with interpenetrating network structure and preparation method thereof

An interpenetrating network structure and ion-exchange membrane technology, applied in the field of polymer functional membrane materials, can solve the problems of difficult control of membrane material composite process, difficulty in large-scale batch production, and environmental pollution of sulfonating agents, so as to reduce membrane protons. Excellent exchange resistance, strong electrochemical corrosion resistance, and simple film production method

Active Publication Date: 2011-09-28
SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

1) The compounding process of membrane materials is difficult to control, the cost is high and the use of sulfonating agent is easy to cause environmental pollution; 2) The treatment process often includes multiple steps, which is difficult to apply to large-scale batch production

Method used

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  • Ion exchange membrane with interpenetrating network structure and preparation method thereof
  • Ion exchange membrane with interpenetrating network structure and preparation method thereof
  • Ion exchange membrane with interpenetrating network structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] With 120g dry sulfonic acid resin (the number average molecular weight is 75,000, the exchange capacity is 0.95mmol / g, Na + type) was dissolved in 880g N, N-dimethylformamide (DMF), to obtain sulfonic acid solution (casting solution), add sodium vinylbenzene sulfonate monomer 110g, initiator azobisisobutyronitrile 0.5g , and cross-linking agent divinylbenzene (DVB) 50g, after dissolving and stirring evenly, drool on a smooth and horizontal glass surface, evaporate the solvent at 70°C for 10h to form a film, and peel off the glass to obtain an ion exchange membrane. Gas fluorination to obtain an ion-exchange membrane with an interpenetrating network structure with a film thickness of 50 microns.

Embodiment 2

[0038] With 45g dry sulfonic acid resin (number-average molecular weight is 300,000, exchange capacity is 0.8mmol / g, H + type) was dissolved in 880g dimethyl sulfoxide (DMSO) to obtain a sulfonic acid solution (casting solution), adding 100 g of sodium propylene sulfonate monomer, 0.5 g of initiator azobisisobutyronitrile, and crosslinking agent two Dissolve and stir 30g of ethylene glycol methacrylate (EGDMA) evenly, drool on the surface of a smooth and horizontal Hastelloy plate, heat up to 150°C to evaporate the solvent for 1 hour to form a film, and peel off the glass to obtain an ion exchange membrane. Fluorination with fluorine gas to obtain an ion-exchange membrane with an interpenetrating network structure with a film thickness of 30 microns.

Embodiment 3

[0040] With 420g dry sulfonic acid resin (the number average molecular weight is 120,000, the exchange capacity is 1.05mmol / g, Na + Type) is dissolved in 880g N, in the N-dimethylacetamide (DMAc), obtains sulfonic acid solution (casting solution), adds sodium vinylbenzene sulfonate monomer 300g, initiator benzoyl peroxide (BPO) 3g, and cross-linking agent divinylbenzene (DVB) 50g, after dissolving and stirring evenly, drool on a smooth and horizontal glass surface, evaporate the solvent at 100°C for 2h to form a film, and peel off the glass to obtain an ion exchange membrane. The fluorine gas is fluorinated to obtain an ion-exchange membrane with an interpenetrating network structure with a film thickness of 150 microns.

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Abstract

The invention relates to an interpenetrating network structure ion-exchange membrane and a preparation method thereof. The preparation method comprises the following steps: a perfluorinated sulfonic acid exchange resin and a polymerizable monomer containing proton exchange functional groups are dissolved by using a polar organic solvent; and casting film is formed on the smooth surface of a solidby using the tape casting method; the polymerizable monomer containing the proton exchange functional groups is initiated to generate polymerization reaction, and the products of the polymerization reaction and perfluorinated sulfonic acid molecular chains form the ion exchange membrane with the interpenetrating network structure. The preparation method of the ion exchange membrane can obtain ionexchange membrane materials with very good proton exchange property, overcomes the defects that the homogeneous cross-linked ion exchange membrane can not be prepared in the existing melt molding process, and has the advantages of simple technological process, easy industrial scale-up and the like.

Description

technical field [0001] The invention relates to an ion exchange membrane for a proton exchange membrane fuel cell (PEMFC) and a vanadium redox flow battery (VRB), in particular to an interpenetrating network ion exchange membrane and a preparation method thereof, belonging to the field of polymer functional membrane materials. Background technique [0002] The all-vanadium redox flow battery is a new type of energy storage device, which can not only be used as an energy storage device for solar and wind power generation, but also be used for peak regulation of the power grid, improve the stability of the power grid, and ensure the safety of the power grid. Among the existing energy storage technologies, the all-vanadium redox flow battery (VRB) has the advantages of long cycle life, high energy efficiency, low operation and maintenance costs, environmental friendliness, short response time and no harm to the battery due to deep discharge. It can meet the needs of various fie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F14/18H01M8/02H01M2/16C08J5/22C08J7/12C08L27/18H01M8/1039H01M8/1088
CPCY02E60/12Y02E60/50Y02P70/50
Inventor 张永明张恒王学军刘小宁
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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