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Method for preparing polyimide/silver composite electrical conductivity fibers

A technology of polyimide and composite conduction, applied in the direction of fiber treatment, fiber type, fiber chemical characteristics, etc., can solve the problems of low production efficiency, complicated process, high cost, etc., and achieve high adhesion strength, simple process, and good metallic luster Effect

Active Publication Date: 2011-11-09
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, and the patent publication number of CN 101446037A describes the method of chemical metal plating in detail. The equipment required for this method is simple and the damage to the fibers is small. And the fiber can be processed continuously, and the obtained fiber has excellent conductivity, but this method has complicated process, low production efficiency, high cost and serious pollution

Method used

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  • Method for preparing polyimide/silver composite electrical conductivity fibers
  • Method for preparing polyimide/silver composite electrical conductivity fibers
  • Method for preparing polyimide/silver composite electrical conductivity fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A: The polyamic acid solution with a solid content of 15% PMDA / ODA is used to prepare polyamic acid fibers by wet spinning process;

[0033] B: Pass the polyamic acid fiber prepared in step A through the silver ammonia solution with a concentration of 0.01mol / l at a constant speed under the action of the rotation of the godet for 5 minutes, then wash with water to remove the silver salt attached to the surface, and then Remove the water on the surface of the fiber through a low-temperature heating furnace at a uniform speed. The temperature of the low-temperature heating furnace is set at 100°C and the heating time is 10 minutes to obtain fibers with silver polyamic acid on the surface;

[0034]C: Pass the fiber obtained in step B with polyamic acid silver salt on the surface at a constant speed through a high-temperature furnace for silver reduction and imidization of the fiber under the action of a godet roller. The temperature of the high-temperature furnace is 220 ° ...

Embodiment 2

[0036] A: The polyamic acid fiber is prepared by using a wet spinning process with a PMDA / ODA polyamic acid solution with a solid content of 20%;

[0037] B: Pass the polyamic acid fiber prepared in step A through the silver nitrate solution with a concentration of 0.001mol / l at a constant speed under the action of the rotation of the godet for 10 minutes, then wash with water to remove the silver salt attached to the surface, and then Remove the water on the surface of the fiber through a low-temperature heating furnace at a uniform speed. The temperature of the low-temperature heating furnace is set at 180°C, and the heating time is 5 minutes to obtain fibers with silver polyamic acid on the surface;

[0038] C: Pass the fiber obtained in step B with the surface of polyamic acid silver salt through a high-temperature furnace at a constant speed under the action of a godet roll to reduce silver and imidize the fiber. The temperature of the high-temperature furnace is 350 ° C, ...

Embodiment 3

[0040] A: The polyamic acid fiber is prepared by using a wet spinning process with a PMDA / ODA polyamic acid solution with a solid content of 25%;

[0041] B: Pass the polyamic acid fiber prepared in step A through the silver nitrate solution with a concentration of 0.0001mol / l at a constant speed under the action of the rotation of the godet for 20 minutes, then wash with water to remove the silver salt attached to the surface, and then Remove the water on the surface of the fiber through a low-temperature heating furnace at a uniform speed. The temperature of the low-temperature heating furnace is set at 200 ° C, and the heating time is 3 minutes to obtain fibers with silver polyamic acid on the surface;

[0042] C: Pass the fiber obtained in step B with polyamic acid silver salt on the surface at a constant speed through a high-temperature furnace to reduce silver and imidize the fiber. The temperature of the high-temperature furnace is 400 ° C, and Keep it for 1 hour to obt...

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Abstract

The invention relates to a method for preparing polyimide / silver composite electrical conductivity fibers, which comprises the following steps: firstly preparing polyamic acid fibers from polyamic acid solution; then drawing polyamic acid fibers at constant speed to carry out iron exchange in soluble silver salt solution to make silver irons diffuse and immerse the surface of the polyamic acid fibers and combined with amic acid radical to obtain a silver salt compound of polyamic acid; and finally by heating, making the silver irons reduced and accumulate on the surface and making polyamic acid fibers cyclized into polyimide fibers to obtain the conductive polyimide / silver composite electrical conductivity fibers. The method of the invention has the advantages of integrated molding, simple process, low cost, no toxicity and no pollution, capacity of being used for large-scale industrial production, high adhesive strength of the silver salt on the surface layer of the fibers, metallic luster, excellent electrical conductivity and the like.

Description

technical field [0001] The invention relates to a method for preparing polyimide / silver composite conductive fiber, in particular to a method for preparing polyimide / silver composite conductive fiber by direct silver ion exchange in-situ self-metallization on polyamic acid fiber. Background technique [0002] Conductive fiber generally refers to the standard state (20 ℃, 65% RH) conductivity of 10 -8 Fibers above S / cm are widely used in power transmission and anti-static work clothes in the electric power industry because conductive fibers have multiple functions such as conduction, antistatic, electric heating, reflection and absorption of electromagnetic waves, and sensing; electric heating bandages in the medical industry, Anti-electromagnetic radiation work clothes; electromagnetic shielding covers and "stealth" materials in the aerospace precision electronics industry; conductivity sensors, optical sensors, etc. in the sensing industry. There are many kinds of conducti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/74D06M11/83D06M101/30
Inventor 武德珍韩恩林王月李论齐胜利吴战鹏
Owner BEIJING UNIV OF CHEM TECH
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