Method for preparing cross-linked polyimide membrane

A sulfonated polyimide membrane and a technology of sulfonated polyimide are applied in the field of preparation of functional polymer materials to achieve the effects of low cost, improved service life and simple operation
CN1765958AInactive Publication Date: 2006-05-03SHANGHAI CHLOR ALKALI CHEM +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI CHLOR ALKALI CHEM
Publication Date
2006-05-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a new method to prepare crosslinking polysulfonimides membrane, which comprises: dissolving the material in organic solvent with phosphoric anhydride, film forming with liquid moulding, drying for 2~20h at 60~200Deg; then, drying in vacuum for 1~30h at 100~200Deg; dipping the membrane in deionized water, clearing to neutrality, and drying in vacuum. This method is simple and economical. This product has well water resistance and high proton conductivity and wide application in fuel cell, ion exchange resin and sensor.
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Description

technical field

[0001] The invention relates to a preparation method of a functional polymer material, in particular to a preparation method of a cross-linked sulfonated polyimide membrane. Background technique

[0002] Polyimide is a class of high-performance polymers with excellent heat resistance, high mechanical strength and modulus, excellent electrical properties and good chemical resistance. It has been widely used in aerospace industry and electronics industry. Six-membered ring sulfonated polyimide is a new member of the polyimide family developed in recent years. These materials have potential application prospects in fuel cells, ion exchange resins, membrane separation and sensors. Especially in terms of fuel cells, sulfonated polyimide is considered to be one of the most promising new proton exchange membrane materials for practical use. French patent 9605707 (1996) reported the preparation method of sulfonated polyimide for the first time, and its used sulfon...

Claims

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