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The present invention relates to a kind of chlorine industry with low resistance high strength ionic exchange membrane and preparation method thereof, belong to polymeric material field. Du pont company has been developed perfluorinated sulfonic resin and ion-exchange membrane thereof the sixties.
The skeleton structure ion-exchange membrane of this perfluoro of the very fast discovery of people has extraordinary stability, is adapted at most using in the severe rugged environment of chlor-alkali electrolytic cells, thereby is used widely in chlorine industry rapidly. Be subjected to the inspiration of E. Du Pont Company's perfluorinated ion-exchange membrane, Japan AGC company and Japanese Asahi Kasei Corporation have also been developed the similar perfluorinated ion exchange resin of structure and ionic membrane in succession.
Japanese Asahi Kasei Corporation had replaced the perfluoro sulfonic acid membrane of E. Du Pont Company with the perfluorocarboxylic acid film in , and had developed carboxylic acid-sulfonic acid composite membrane. Present business-like chlorine industry is perfluorocarboxylic acid-perfluorinated sulfonic acid composite membrane with perfluorinated ion-exchange membrane Membrane Used In Chlor-alkali Cell , and namely the anode side of film is that perfluorinated sulfonic acid layer, cathode side are the perfluorocarboxylic acid layer.
Obtain high current density and keep simultaneously certain physical strength and dimensional stability for solving ionic membrane, usually adopt the physical strength of the Material reinforcement ionic membranes such as fiber, cloth, fabric, keep the dimensional stability of mould material.
European patent EP B1 discloses and has utilized the glass fibre membrane of glass fibre non-woven technology preparation to strengthen Du Pont The technology of series membranes is mentioned the oxide compounds such as silicon-dioxide simultaneously in this patent document. But non-woven glass fibre cloth is the base material that must use in this patent document, and this will limit the use range of film greatly. US Patent No. The method can not be produced continuously because transformation process is consuming time, and the surface does not have functional inorganics to improve the Film conductivity energy yet simultaneously.