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Method for preparing interpenetrating network type conducting film of polyion liquid

An interpenetrating network type, polyionic liquid technology, used in the field of polymer conductive film material preparation, can solve the problems of inability to guarantee film stability and loss, and achieve reduced ion conduction resistance, strong electrochemical corrosion resistance, and electrical conductivity. high effect

Inactive Publication Date: 2011-09-14
TSINGHUA UNIV
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  • Summary
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  • Claims
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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.

Method used

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  • Method for preparing interpenetrating network type conducting film of polyion liquid
  • Method for preparing interpenetrating network type conducting film of polyion liquid
  • Method for preparing interpenetrating network type conducting film of polyion liquid

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Embodiment 8

[0032] Embodiment 8: In order to further verify the method proposed by the present invention, the ionic liquid was replaced with 1-allyl-3-vinylimidazolium bromide ionic liquid, and its molecular structure is as follows.

[0033]

[0034]Add 1-allyl-3-vinylimidazole bromide ionic liquid into dimethyl sulfoxide (DMSO) according to the ratio of (ionic liquid weight / PVDF weight) = 0.2, 0.3, 0.4, 0.6, fully dissolve and pour Put it into the weighed polyvinylidene fluoride, mix thoroughly with a glass rod, then place it in a constant temperature water bath at 60°C, and stir it with an electric stirrer for 1 hour until it is fully dissolved and a uniform transparent solution is obtained. After dissolving, if there are many bubbles in the solution, it can be placed in a dry box for a while to eliminate bubbles. If there are no bubbles or few bubbles, this step can be omitted. After removing the air bubbles, pour the film-casting solution on a clean glass plate and scrape it into a...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/22C08L27/16C08L39/04C08F126/06
Inventor 王保国青格乐图刘平范永生
Owner TSINGHUA UNIV
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