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

An in-situ polymerization and polyaniline technology, which is used in the field of in-situ polymerization to prepare polyaniline conductive composite films and conductive film materials, can solve the problems of decreased electrical conductivity, poor film-forming properties of blends, difficult processing, etc. The effect of operation, good repeatability and simple method

Inactive Publication Date: 2008-07-23
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 pr...

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0012] Weigh 0.35g of surfactant sodium dodecylbenzenesulfonate at a temperature of 25°C, place in 200mL of deionized water and adjust the pH to 2.3 with citric acid, then weigh 1.7mL of aniline, and add it to the above solution, Stir at 100rpm to dissolve, add 16×8cm 2 The polysulfone membrane was stirred for 4 hours, and then stirred for 2 hours at 5 °C. Then weigh 4.25g of ammonium persulfate, dissolve it in a small amount of deionized water, add it to the above solution with polysulfone membrane, stir for 10 minutes, and react at 0-5°C for 24 hours. After the reaction is completed, the polyaniline conductive composite film is taken out, washed with anhydrous methanol, hydrochloric acid with a mass concentration of 36% and deionized water to obtain a finished polyaniline conductive composite film. The electron micrograph of the surface of the polyaniline conductive composite film is as shown in accompanying drawing 1. Using the two-electrode method to test the prepared po...

Embodiment 2

[0014] Weigh 0.35g of surfactant sodium dodecylbenzenesulfonate at a temperature of 25°C, place in 200mL of deionized water and adjust the pH to 2.3 with citric acid, then weigh 1.7mL of aniline, and add it to the above solution, Stir at 100rpm to dissolve, add 16×8cm 2 The polysulfone membrane was stirred for 4 hours, and then stirred for 2 hours at 5 °C. Then weigh 4.25g of ammonium persulfate, dissolve it in a small amount of deionized water, add it to the above solution with polysulfone membrane, stir for 10 minutes, and react at 0-5°C for 2.5 hours. After the reaction is completed, the polyaniline conductive composite film is taken out, washed with anhydrous methanol, hydrochloric acid with a mass concentration of 36% and deionized water to obtain a finished polyaniline conductive composite film. Using the two-electrode method to test the prepared polyaniline conductive composite film, the measured conductivity is: 0.013S / cm.

Embodiment 3

[0016] Weigh 0.35g of surfactant sodium dodecylbenzenesulfonate at a temperature of 25°C, place it in 200mL of deionized water and adjust the pH to 2.3 with camphorsulfonic acid, then weigh 1.7mL of aniline and add it to the above solution , stir at 100rpm to dissolve, add 16×8cm 2 The polysulfone membrane was stirred for 4 hours, and then stirred for 2 hours at 5 °C. Then weigh 4.25g of ammonium persulfate, dissolve it in a small amount of deionized water, add it to the above solution with polysulfone membrane, stir for 10 minutes, and react at 0-5°C for 24 hours. After the reaction is completed, the polyaniline conductive composite film is taken out, washed with anhydrous methanol, hydrochloric acid with a mass concentration of 36% and deionized water to obtain a finished polyaniline conductive composite film. Using the two-electrode method to test the prepared polyaniline conductive composite film, the measured conductivity is: 7.21×10 -4 S / cm.

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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...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L79/02C08G73/02
Inventor 王志樊智锋单毅王纪孝王世昌
Owner TIANJIN UNIV
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