Method for preparing polyaniline conductive composite film by in-situ polymerization

Abstract

The invention discloses a preparation method for in situ polymerized polyaniline conductive composite membrane, belonging to the technical field of conductive membrane material. The process comprises the following steps: the citric acid, the camphor sulfonic acid or hydrochloric acid are added into the sodium dodecyl benzene sulfonate solution for regulating pH value under twenty to twenty-five DEG C, and then aniline is added into the sodium dodecyl benzene sulfonate solution, polysulfone membrane is added in the sodium dodecyl benzene sulfonate solution after uniform mixing; the solution is agitated for four to six hours under twenty to twenty-five DEG C, and then agitated for two hours under zero to five DEG C; then a plurality of ammonium persulfates are added in the solution to finish the reaction after being agitated for a plurality of minutes under zero to five DEG C; the made polyaniline conductive composite membrane is scoured off the adsorbed impurity through deionized water, then is washed through anhydrous methanol and hydrochloric acid and finally through deionized water, obtaining the finished product of polyaniline conductive composite membrane. The preparation method for in situ polymerized polyaniline conductive composite membrane has the advantages of simple method, easy operation, the conductivity range of the made polyaniline conductive composite membrane is 7.21*10<-4> S / cm to 0.286S / cm.

Description

technical field [0001] The invention relates to a method for preparing a polyaniline conductive composite film by in-situ polymerization, which belongs to the technology of conductive film materials. Background technique [0002] Polyaniline (PANI) is easy to obtain raw materials, diverse in structure, and has excellent physical and chemical properties. The conductive film made of polyaniline can be applied to various occasions such as electromagnetic shielding, static electricity dispersion, electricity to discoloration, pH sensitive components, and anti-corrosion. However, polyaniline has poor comprehensive mechanical properties, is insoluble in general organic solvents, and is difficult to process by traditional molding methods, which seriously hinder its popularization and application. In order to make it easy to process into a film, people have done a lot of research work: polyaniline doped with organic acids can be dissolved in organic solvents compatible with these ac...

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Problems solved by technology

However, polyaniline has poor comprehensive mechanical properties, is insoluble in general organic solvents, and is difficult to process by traditional molding methods, which seriously hinder its popularization and application.

In order to make it easy to process into a film, people have done a lot of research work: polyaniline doped with organic acids can be dissolved in organic solvents compatible with these acids, which solves the processability problem of polyaniline to a certain extent. However, using a large amount of organic acids and organic solvents in the preparation and coating process will cause serious environmental pollution and increase the difficulty and cost of environmental governance (J.Dominis, Synth.Met.2002, 129, 165); p-aniline monomer Modification to prepare soluble polyaniline derivatives and polyaniline block and graft copolymers can also improve its solubility for easy processing, but often sacrifices good electrical conductivity, which is difficult to apply to polyaniline conductive film materials (X.G.Li.Chem Rev, 2002, 102, 2925); blending polyaniline with easily processable polymers such as polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), etc. can to a certain extent Improve the processability, but with the increase of polyaniline content, the film-forming property of the blend becomes worse, it is difficult to have practical application, and because most of the polyaniline is inside the matrix, the electrical conductivity decreases compared with pure polyaniline ( M. R. Vallim. J Appl. Polym. Sci. 2000, 75: 677)

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