Polyaniline/polyacrylonitrile composite conductive fibre and preparation process thereof

A polyacrylonitrile and composite conductive technology, which is applied in the direction of conductive/antistatic filament manufacturing, conjugated synthetic polymer artificial filament, etc., can solve the problems of poor applicability and inability to meet industrial production

Inactive Publication Date: 2003-10-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the technology provided in this document only studies doped polyaniline, and does not solve the shortcomings of polyaniline fibers such as poor strength and high brittleness, and its practical applicability is poor, which cannot meet the needs of industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 20 grams of polyaniline dodecylbenzene sulfonate and add it to 180 grams of chloroform and stir at 40°C for 6 hours to obtain solution A;

[0031] Then 180 g of polyacrylonitrile was added to 600 g of dimethyl sulfoxide, and stirred at 60° C. for 10 hours to obtain solution B. The solution A and the solution B were mixed, and stirred at 50° C. for 6 hours to make them uniformly mixed to obtain a blended spinning solution.

[0032] Adopting wet spinning technology route, using conventional wet forming equipment, the above spinning slurry is filtered and metering pump, and then squeezed into the coagulation bath through the spinneret. The coagulation bath is an aqueous solution of dimethyl sulfoxide and the temperature of the coagulation bath At 20°C, the concentration of dimethyl sulfoxide was 50%, and a certain amount of dodecylbenzene sulfonic acid was added to make the pH of the coagulation bath 3. After the polymer is solidified, it is stretched in water with a pH ...

Embodiment 2

[0034] Repeat Example 1 with the following differences: weigh 15 grams of camphorsulfonate of polyaniline and dissolve it with 135 grams of xylene; and dissolve 135 grams of polyacrylonitrile with 500 grams of dimethyl sulfoxide. The dopant of the fiber is camphorsulfonic acid, the blending solvent is xylene / dimethyl sulfoxide, and the coagulation bath is a 50% dimethyl sulfoxide aqueous solution. The electrical conductivity of the fiber is 0.68S / cm, and the strength is 1.76CN / dtex.

Embodiment 3

[0036] Repeat Example 1, with the following differences: Weigh 10 grams of polyaniline dodecylbenzene sulfonate and dissolve it with 90 grams of chloroform; and dissolve 190 grams of polyacrylonitrile with 680 grams of dimethyl sulfoxide. . The dopant of the fiber is dodecyl benzene sulfonic acid, the blending solvent is chloroform / dimethyl sulfoxide, and the coagulation bath is a 50% dimethyl sulfoxide aqueous solution. The electrical conductivity of the fiber is 7.3×10 -3 S / cm, the intensity is 2.90CN / dtex.

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Abstract

The present invention discloses a polyaniline / polyacrylonitrile composite conductive fibre and its preparation method. Its preparation method includes the following steps: firstly, preparing soluble polyaniline doped by organic sulfonic acid, then using solvent to dissolve the organic sulfonate of polyaniline and polyacrylonitrile; adopting wet spinning technology to press the mixed solution through spinning nozzle, and extruding the mixed solution into the coagulating bath, drawing and washing with water so as to obtain the invented composite conductive fibre. The electric conductivity of said fibre can be controlled in the range of 10(-7)-10(-1)(S / cm), and said fibre has good strength, generally it is 1.5CN / dtex-3.4 / detex, can be used for making electromagnetic shielding material and anti-static material.

Description

Technical field [0001] The invention relates to a conductive fiber, in particular to a polyaniline composite conductive fiber and a preparation method thereof. Background technique [0002] Conductive polymer is currently a very active research field, which has developed into a cross-science of polymer, electrochemistry and solid state physics. Compared with other conductive polymers, polyaniline has the advantages of simple preparation, good stability in air and water, strong charge storage capacity, and high conductivity. Therefore, it has attracted wide attention from domestic and foreign researchers and is considered to be the most promising conductive polymer. One of the polymers. [0003] People have systematically studied the synthesis, conduction mechanism, and molecular structure of polyaniline. In recent years, a relatively consistent understanding has been achieved, and the focus of research is shifting to application development. The preparation of polyaniline conduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F1/09D01F8/08
Inventor 李光杨胜林潘玮江建明
Owner DONGHUA UNIV
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