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Method for improving conductivity of polyaniline and polyaniline composite film by cold drawing

A polyaniline film and composite film technology, which is applied to other household appliances, flat products, household appliances, etc., can solve the problems of damage to the size of the film, long time, and unfavorable industrial applications, and achieve the effect of improving the conductivity at room temperature and easy operation.

Inactive Publication Date: 2012-12-12
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the method of this thermal stretching to improve conductive polyaniline and its polyaniline composite film has many deficiencies.
One is that a high temperature environment is required (80-110°C); the other is that the elongation rate needs to reach 200% in order to greatly increase the electrical conductivity of the film, and this process takes a long time; the third is that this thermal stretching will destroy the original film. Variations in the dimensions of the film, which are detrimental to industrial applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Preparation of polyaniline;

[0030] Add the purchased polyaniline powder into N-methylpyrrolidone (NMP), and stir evenly to obtain a black polyaniline saturated solution;

[0031] 2. Add the above polyaniline saturated solution drop by drop on the cleaned slide, the amount of which is 0.025mL / cm 2 (that is, add 0.025mL polyaniline saturated solution dropwise to each square centimeter slide), then heat and dry the slide in an oven to obtain a neutral polyaniline film, and the heating and drying temperature is 50°C;

[0032] 3. Cold stretching treatment of polyaniline film

[0033] Cut the polyaniline film into a rectangle of 10×10×70;

[0034] At room temperature, the cut rectangular polyaniline film is clamped by a tensile fixture, and the tensile fixture holding the rectangular polyaniline film is placed on an electronic universal testing machine to elastically stretch the rectangular polyaniline film. The running speed of the crossbeam of the universal testing ...

Embodiment 2

[0038] 1. Preparation of polyaniline;

[0039] Add the purchased polyaniline powder into N-methylpyrrolidone (NMP), and stir evenly to obtain a black polyaniline saturated solution;

[0040] 2. Add the above polyaniline saturated solution drop by drop on the cleaned slide, and the dropping amount is 0.07mL / cm 2 (that is, add 0.07mL polyaniline saturated solution dropwise to each square centimeter slide), then heat and dry the slide in an oven to obtain a neutral polyaniline film, and the heating and drying temperature is 65°C;

[0041] 3. Cold stretching treatment of polyaniline film

[0042] Cut the polyaniline film into a rectangle of 10×10×70;

[0043] At room temperature, the cut rectangular polyaniline film is clamped by a tensile fixture, and the tensile fixture holding the rectangular polyaniline film is placed on an electronic universal testing machine to elastically stretch the rectangular polyaniline film. The running speed of the crossbeam of the universal testin...

Embodiment 3

[0047] 1. Preparation of polyaniline;

[0048] Add the purchased polyaniline powder into N-methylpyrrolidone (NMP), and stir evenly to obtain a black polyaniline saturated solution;

[0049] 2. Add the above polyaniline saturated solution drop by drop on the cleaned slide, the amount of which is 0.125mL / cm 2 (that is, add 0.125mL polyaniline saturated solution dropwise to each square centimeter slide), then heat and dry the slide in an oven to obtain a neutral polyaniline film, and the heating and drying temperature is 85°C;

[0050] 3. Cold stretching treatment of polyaniline film

[0051] Cut the polyaniline film into a rectangle of 10×10×70;

[0052] At room temperature, the cut rectangular polyaniline film is clamped by a tensile fixture, and the tensile fixture holding the rectangular polyaniline film is placed on an electronic universal testing machine to elastically stretch the rectangular polyaniline film. The running speed of the crossbeam of the universal testing ...

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Abstract

The invention provided a method for improving conductivity of a polyaniline film or a polyaniline composite film by cold drawing, comprising the following steps: tailoring the polyaniline film or the polyaniline composite film to be in a rectangular shape; carrying out elastic stretching on the rectangular polyaniline film or the rectangular polyaniline composite film with an electronic universaltesting machine at room temperature; and soaking the polyaniline film or the polyaniline composite film after cold drawing in acid solution for doping reaction to obtain the polyaniline film or the polyaniline composite film with improved conductivity. The method has simple operation and can improve the room-temperature conductivity of the film by 2-20 times and avoid damage to shape and size of the film, thus being widely applied to the polyaniline film or the polyaniline composite film.

Description

technical field [0001] The invention relates to a method for improving the electrical conductivity of polyaniline and polyaniline composite films by cold stretching. Background technique [0002] Since MacDiarmid studied polyaniline (PANI), which is easy to synthesize and has good environmental stability, as a conductive polymer in the 1980s, research on the synthesis, structure, electrical conductivity and processing technology of polyaniline and its polyaniline composite materials has been carried out. significant progress has been made. With the development of molecular electronic devices, the application of polyaniline and its composite materials is also developing towards thin film. How to improve the conductivity of conductive polyaniline and its conductive polyaniline composite film has become the focus of scientists in recent years. In 1991, Cromack et al. found that thermal stretching of polyaniline film at a temperature region higher than the glass transition poi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D7/01B29C55/02
Inventor 付绍云肖红梅张卫东
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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