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Perfluoro ion exchange membrane with 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 membrane material composite process, difficult mass 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

Inactive 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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  • Perfluoro ion exchange membrane with interpenetrating network structure and preparation method thereof
  • Perfluoro ion exchange membrane with interpenetrating network structure and preparation method thereof
  • Perfluoro ion exchange membrane with interpenetrating network structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] With 120g hydrogen type dry sulfonic acid resin (number average molecular weight 80,000, exchange capacity 0.95mmol / g, H + type) is dissolved in 880gN, in N-dimethylformamide (DMF), obtains sulfonic acid solution (casting solution), adds salt type perfluorosulfonic acid type ion exchange resin (structural formula 3, number average molecular weight 80,000, exchange Capacity 0.85mmol / g, Ce type) 50g, dissolve and stir evenly, drool on a smooth and horizontal glass surface, evaporate the solvent at 70°C for 10h to form a film, peel off the glass to obtain an ion exchange membrane, and treat with 5% hydrochloric acid An ion exchange membrane with an interpenetrating network structure with a film thickness of 50 microns was obtained.

Embodiment 2

[0046] With 50g hydrogen type dry sulfonic acid resin (number average molecular weight 150,000, exchange capacity 0.8mmol / g, H + type) was dissolved in 880g dimethyl sulfoxide (DMSO) to obtain a sulfonic acid solution (casting solution), adding salt type perfluorosulfonic acid ion exchange resin (structural formula 2, number average molecular weight 80,000, exchange capacity 1.25mmol / g, La type) 50g, after dissolving and stirring evenly, drool on the surface of a smooth and horizontal Hastelloy flat plate, heat up to 150°C to evaporate the solvent for 1h to form a film, peel off the glass to obtain an ion exchange membrane, and use 12% hydrochloric acid An ion-exchange membrane with an interpenetrating network structure with a film thickness of 18 micrometers was obtained through treatment.

Embodiment 3

[0048] With 420g hydrogen type dry sulfonic acid resin (number average molecular weight 280,000, exchange capacity 1.05mmol / g, H + type) is dissolved in 880gN, in N-dimethylacetamide (DMAc), obtains sulfonic acid solution (casting solution), adds salt type perfluorosulfonic 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, drool on a smooth and horizontal glass surface, evaporate the solvent at 100°C for 2h to form a film, peel off the glass to obtain an ion exchange membrane, and treat with 10% sulfuric acid An ion exchange membrane with an interpenetrating network structure with a film thickness of 150 microns was obtained.

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Abstract

The invention relates to a perfluoro ion exchange membrane with an interpenetrating network structure and a preparation method thereof. The preparation method comprises the following steps: dissolving hydrogen type perfluorosulfonic acid ion exchange resin and salt type perfluorosulfonic acid ion exchange resin by adopting a polar organic solvent; casting surface of a smooth solid through tape casting; and forming the membrane under the condition of heating, wherein molecular chains of the hydrogen type perfluorosulfonic acid ion exchange resin and the salt type perfluorosulfonic acid ion exchange resin form the macromolecular interpenetrating network structure. The method for preparing the membrane can prepare the homogenized ion exchange membrane material with good exchange performance,overcomes the defect that the conventional melting molding process cannot prepare the homogenized ion exchange membrane, and has the advantages of simple technological process, easy industrial amplification and the like.

Description

technical field [0001] The invention relates to a perfluorinated ion-exchange membrane for vanadium redox flow battery (VRB) and proton exchange membrane fuel cell (PEMFC), in particular to a perfluorinated ion-exchange membrane with an interpenetrating network structure and a preparation method thereof, belonging to high The field of molecular functional membrane materials. Background technique [0002] The all-vanadium redox flow battery (VRB) realizes the storage and release of electric energy through the mutual transformation of vanadium ions in different valence states. It is the only battery system composed of the same element among many chemical power sources, which avoids the positive and negative half-cells in principle. Cross-contamination caused by mutual penetration of different types of active substances. The all-vanadium redox flow battery is used for mutual conversion of electrical energy and chemical energy, and is suitable for large-scale electrical energy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F14/18B01D71/32C08L27/18C08J5/22H01M8/02H01M2/16H01M8/1027H01M8/1039H01M8/1069
CPCY02E60/12Y02E60/50Y02P70/50
Inventor 王学军张永明张恒杨磊
Owner SHANDONG DONGYUE POLYMER MATERIAL
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