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Ion exchange membrane of interpenetrating network structure and preparation method thereof

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

Active Publication Date: 2011-09-28
SHANDONG DONGYUE POLYMER MATERIAL
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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 of interpenetrating network structure and preparation method thereof
  • Ion exchange membrane of interpenetrating network structure and preparation method thereof
  • Ion exchange membrane of interpenetrating network structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 120g H + Type dry sulfonic acid resin (number-average molecular weight 80,000, exchange capacity 0.95mmol / g) was dissolved in 880g N,N-dimethylformamide (DMF) to obtain sulfonic acid solution (casting solution), and salt-type complete Fluorosulfonic acid type ion exchange resin (structural formula 2, number average molecular weight 80,000, exchange capacity 0.85mmol / g, Ce type) 50g, dissolve and stir evenly, salivate on a smooth and horizontal glass surface, evaporate the solvent at 70°C for 10h Membrane formation, peeling off from 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 50 microns.

Embodiment 2

[0045] 50g H + Type dry sulfonic acid resin (number average molecular weight 150,000, exchange capacity 0.8mmol / g) was dissolved in 880g dimethyl sulfoxide (DMSO) to obtain a sulfonic acid solution (casting solution), and salt type perfluorosulfonic acid type Ion exchange resin (structural formula 3, number average molecular weight 80,000, exchange capacity 1.25mmol / g, La type) 50g, dissolved and stirred evenly, salivated on the surface of a smooth and horizontal Hastelloy plate, heated to 150°C to evaporate the solvent for 1h Forming a film, peeling off from the glass to obtain an ion-exchange membrane with a film thickness of 18 microns and an interpenetrating network structure.

Embodiment 3

[0047] 420gH + Type dry sulfonic acid resin (number average molecular weight 250,000, exchange capacity 1.05mmol / g) was dissolved in 880g N,N-dimethylacetamide (DMAc) to obtain sulfonic acid solution (film casting solution), and salt type full Fluorosulfonic acid type ion exchange resin (structural formula 4, number average molecular weight 80,000, exchange capacity 2.55mmol / g, Mn type) 100g, dissolve and stir evenly, salivate on a smooth and horizontal glass surface, evaporate the solvent at 100°C for 2h Forming a film, peeling off from the glass to obtain an ion-exchange membrane with a film thickness of 150 microns and an interpenetrating network structure.

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Abstract

The invention relates to an ion exchange membrane of interpenetrating network structure and a preparation method thereof. The preparation method is characterized by dissolving a hydrogen type perfluorosulfonic acid ion exchange resin and a salt type perfluorosulfonic acid ion exchange resin with a polar organic solvent; casting the solution on the smooth solid surface; and then forming the membrane under heating condition, wherein the molecular chains of the hydrogen type perfluorosulfonic acid ion exchange resin and the salt type perfluorosulfonic acid ion exchange resin form the macromolecular ion exchange membrane of interpenetrating network structure. The ion exchange membrane with good mechanical performance can be obtained by the method, thus overcoming the defect that the homogeneous crosslinked ion exchange membranes can not be prepared in the existing fusing and molding processes, and the method has the advantages of simple technological process, easy industrial scale-up, etc.

Description

technical field [0001] The invention relates to a perfluorinated ion-exchange membrane for a proton exchange membrane fuel cell (PEMFC) and a vanadium redox flow battery (VRB), in particular to an interpenetrating network perfluorinated ion-exchange membrane and a preparation method thereof, belonging to a polymer function the field of membrane materials. Background technique [0002] Among the many energy storage systems, the redox flow battery is the only secondary energy system that utilizes the oxidation-reduction reaction between different valence states of the same element for energy storage and conversion. The battery system has the advantages of no emission pollution, adjustable capacity, and long cycle life. The all-vanadium redox flow battery is an excellent energy storage device considering the cost, life and efficiency. It can make effective use of renewable resources (solar energy, wind energy and hydropower resources) to alleviate the growing energy crisis; i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F14/18H01M4/94C08J5/22C08L27/18
CPCY02E60/50
Inventor 张永明王学军张恒蕫辰生
Owner SHANDONG DONGYUE POLYMER MATERIAL
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