Method for preparing interpenetrating network type conducting film of polyion liquid

Abstract

The invention provides a method for preparing an interpenetrating network type conducting film of polyion liquid, belonging to the technical field of production of a high polymer conducting film. The method is characterized in that a polyvinylidene fluoride with stable chemical property as a substrate material is dissolved in strongly polar solvent with an ion liquid monomeric compound containingcarbon-carbon double bonds, such as 1-allyl-3-vinyl imidazole chloride, so as to prepare uniform solution after mixing; a film is prepared by a salivation method; and after heat treatment, the film triggers a monomer to perform a polymerization reaction, and forms the ion conducting film of the interpenetrating network with substrate high molecules. The conducting film can play a role of ionic conduction in electrodialysis, diffusion dialysis and electrochemical sensors. The conducting film material has simple preparation process, avoids using sulfonating agent and other strong oxidation substances in the preparing process, is advantageous to environmental protection, and simultaneously solves the problem that a homogeneous ionic conducting film cannot be obtained by the fusion method of ionic exchange resin.

Description

technical field [0001] The invention belongs to the technical field of polymer conductive membrane material preparation, and in particular relates to the manufacture of a homogeneous ion conductive membrane and a technical method thereof. Background technique [0002] As a new type of functional material, ion-conducting membranes are widely used in technical fields such as electrodialysis, diffusion dialysis, membrane electrolysis, and electrochemical sensors. In particular, homogeneous ion-conducting membranes have more advantages in reducing energy consumption in industrial processes due to their high electrical conductivity and low membrane resistance. At present, cation exchange membranes or anion exchange membranes used in water treatment processes are usually used as ion-conducting membranes for the above occasions. In order to enhance the chemical resistance of such membrane materials, in addition to the commonly used polyethylene polymer materials, people use fluori...

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Problems solved by technology

However, since the ionic liquid exists in the form of small molecules in the film, it will gradually be lost during long-term use, and the stability of the film cannot be guaranteed.

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