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Method for preparing polyimide/silver composite conductive fiber

A polyimide fiber, composite conductive technology, applied in fiber type, fiber treatment, textiles and paper making, etc., can solve the problems of low production efficiency, poor quality, high cost, etc., and achieve easy operation, short time consumption, and high adhesion The effect of intensity

Inactive Publication Date: 2010-03-03
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production process of silver-containing fiber fabrics generally adopts the chemical silver plating process. This method requires simple equipment, does not damage the fibers, and can process the fibers continuously. The obtained fibers have excellent electrical conductivity, but the production efficiency of this method is low. , poor quality, high cost, and extremely serious pollution

Method used

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  • Method for preparing polyimide/silver composite conductive fiber
  • Method for preparing polyimide/silver composite conductive fiber
  • Method for preparing polyimide/silver composite conductive fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A: The finished polyimide fiber is ultrasonically treated in deionized water for 30 minutes to remove surface impurities and dried, then immersed in 2mol / l potassium hydroxide aqueous solution at room temperature for 1 hour, and then soaked in deionized water 5 minutes to remove the potassium hydroxide attached to the surface, and dry in the air;

[0029] B: Immerse the polyimide fiber treated with strong alkali solution in step A in 0.4mol / l silver nitrate aqueous solution, after ion exchange at room temperature for 1 hour, wash it with deionized water, and let it dry in the air for 12 Hour;

[0030] C: The polyimide fiber that the surface layer obtained in step B is covered with polyamic acid silver salt is immersed in the ascorbic acid aqueous solution of 0.02mol / l, takes out after reacting at room temperature for 20 minutes, washes with deionized water, dries, obtains Polyimide / silver composite conductive fibers.

Embodiment 2

[0032] A: The finished polyimide fiber is ultrasonically treated in deionized water for 30 minutes to remove surface impurities and dried, then immersed in 2mol / l sodium hydroxide aqueous solution at room temperature for 1.5 hours, and then soaked in deionized water 5 minutes to remove the sodium hydroxide attached to the surface, dry in the air;

[0033] B: Immerse the polyimide fibers treated with strong alkali solution in step A in 0.4mol / l silver nitrate aqueous solution, after ion exchange at room temperature for 3 hours, wash with deionized water, and let it dry in the air for 12 Hour;

[0034] C: the polyimide fiber that the surface layer obtained in step B is covered with polyamic acid silver salt is immersed in the ascorbic acid aqueous solution of 0.25mol / l, takes out after reacting at room temperature for 10 minutes, washes with deionized water, dries, obtains Polyimide / silver composite conductive fibers.

Embodiment 3

[0036] A: with step A in embodiment 1;

[0037] B: Immerse the polyimide fiber treated with strong alkali solution in step A in 0.04mol / l silver ammonia solution, after ion exchange at room temperature for 5 minutes, wash it with deionized water, and let it dry in the air for 12 Hour;

[0038] C: with step C in embodiment 2;

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Abstract

The invention relates to a method for preparing polyimide / silver composite conductive fiber, comprising: after removing surface impurities by ultrasonic treatment, soaking finished product polyimide fiber into alkaline solution, and leading polyimide on the surface layer of the fiber to open ring and hydrolyze to generate polyamide salt; then, soaking the polyamide salt into soluble silver salt water solution for ion exchange to form polyamic acid silver salt; finally, soaking the fiber with the polyamic acid silver salt on the surface into ascorbic acid or alkaline water solution containing aldehyde group, leading silver ion in an etch layer to be reduced and gathered on the surface, and obtaining the polyimide / silver composite conductive fiber. The method provided by the invention is simple and convenient for operation, non-toxic, free from pollution, low in cost and easy for industrialization; furthermore, the prepared composite conductive fiber not only maintains the mechanical property of matrix polyimide, but also has good electric conduction property.

Description

technical field [0001] The invention relates to a preparation method of polyimide / silver composite conductive fiber, in particular to a method for preparing polyimide / silver composite conductive fiber by reduction in ascorbic acid or alkaline aldehyde solution. Background technique [0002] Due to the excellent conduction, electric heating, shielding, electromagnetic wave absorption and other functions, conductive fibers are widely used in conductive mesh and conductive work clothes in the electronic power industry; electric heating clothes and electric heating bandages in the medical industry; electromagnetic shielding covers in the aerospace precision electronics industry, etc. aspect. There are many kinds of conductive fibers, which can be comprehensively divided into metal fibers, carbon fibers, non-conductive polymer conductive component-coated fibers, non-conductive polymer conductive component composite fibers, and conductive polymer fibers according to the conductive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/83D06M101/30
Inventor 武德珍牟书香吴战鹏齐胜利
Owner BEIJING UNIV OF CHEM TECH
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