Method for preparing metal/polyaniline/plastic composite film through electrochemical in-situ polymerization

Abstract

The invention discloses a method for preparing a metal / polyaniline / plastic composite film through electrochemical in-situ polymerization. The method comprises the following steps of: 1) preparing a polyaniline / plastic conductive composite film, namely performing electrooxidation polymerization of polyaniline in an aniline-acid solution by taking a plastic microporous film as a base film to obtain the polyaniline / plastic conductive composite plastic film, wherein the electric conductivity of the polyaniline / plastic conductive composite plastic film is 1 to 59.5S.cm<-1>; and 2) preparing a polyaniline / plastic / metal conductive composite film, namely electrodepositing silver on the surface of the polyaniline / plastic conductive composite film to obtain the polyaniline / plastic / metal conductive plastic composite film, wherein the electric conductivity of the polyaniline / plastic / metal conductive plastic composite film is 10<2> to 10<4>S.cm<-1>. The conductive plastic composite film prepared by the method has high electric conductivity and thermal stability and excellent mechanical properties, is high in performance price ratio and light in mass, realizes the organic combination of conductive polymers and metal particles, overcomes the unworkability of the polyaniline, and expands the application range of the conductive polymers. The method is simple and easy; and the obtained composite film can be used as a photoelectronic device, and is used for various fields such as detection and sensing, and electromagnetic shielding.

Description

technical field [0001] The invention discloses a method for preparing a metal / polyaniline / plastic composite film by electrochemical in-situ polymerization; it belongs to the technical field of preparation of conductive composite film materials. Background technique [0002] Polyaniline (PANI) has the advantages of high electrical conductivity, unique doping mechanism, good environmental stability, and low monomer cost. It is one of the conductive polymers with practical application prospects, and has received extensive attention and research at home and abroad. Because a single PANI has limited electrical conductivity, is insoluble and infusible, and is difficult to process and shape, it seriously hinders its application in various fields. Therefore, the composite material formed by dispersing or laminating it with metal powder, metal fiber, etc. can make full use of the superposition of electrical conductivity to improve its electrical conductivity, and composite with high ...

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Problems solved by technology

[0005] Patent CN101225178 reports the conductive composite membrane of in-situ polymerized polyaniline on the polysulfone membrane, which is prepared by chemical in-situ polymerization, the steps are cumbersome, and the conductivity of the composite membrane is not high, and the range of conductivity is only 7.21×10 -4 S cm -1 ~0.286S·cm -1

[0006] Patent CN101033301 reports the preparation method of polyaniline / butadiene rubber conductive composite film. Butadiene rubber is used as the matrix material, and the solution blending casting method is adopted to prepare a doped polyaniline / butadiene rubber conductive composite film. Cresol was used as a secondary dopant to do the secondary doping of the composite film; the film improved the processability of polyaniline, but the electrical conductivity of the composite film was not high, only 10 -1 S cm -1

[0007] The above-mentioned patents all introduce organic composite membranes, which have defects such as complicated process and low conductivity of composite membranes.

And so far, there are very few successful patent reports on the formation of composite films between polymers and metals.

This is because metals and polymers are two substances with completely different chemical compositions, so when the two are compounded, the interfacial interaction between the materials makes it difficult to dissolve each other, and the density of metals is generally much higher than that of polymers, so it will occur when they are compounded. Severe delamination, resulting in poor material uniformity and low conductivity