Silvered aramid conductive fiber and preparation method thereof

A silver-plated conductive fiber and aramid fiber technology, which is applied in fiber treatment, fiber type, textile and papermaking, etc., can solve the problems of uniformity of coating, poor adhesion, inability to meet the needs of large-scale production, and inert surface of aramid fiber Large-scale and other problems, to achieve the effect of easy large-scale production, easy control and detection, and low density

Active Publication Date: 2014-03-26
TIANNUO PHOTOELECTRIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, aramid fiber is a rigid macromolecule with high crystallinity and high degree of orientation. There are a large number of aromatic rings in the aramid fiber molecule, which makes the surface of aramid fiber inert and chemically active, making it difficult to achieve metal adhesion.
"Preparation and Properties of Silver-plated Conductive Aramid Fiber" carried out by Liang Jingjing, Zou Xinguo and others requires the use of a special metalliz

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The base material is meta-aramid fiber (1313) or para-aramid fiber (1414).

[0030] The base material has a fiber section width of 0.36mm and a fiber section thickness of 0.076mm.

[0031] The preparation method is carried out as follows:

[0032] a. Coarsening: put meta-aramid fibers (1313) with a fiber cross-sectional width of 0.36mm and a fiber cross-sectional thickness of 0.076mm into a mixed solution containing 10g of sodium hydroxide, 50g of absolute ethanol and the remainder water In the mixed solution, roughen for 120min at the temperature of the mixed solution at 60°C, and then wash with water until neutral;

[0033] b. Hydrolysis: Put the roughened aramid fiber in step a into a hydrochloric acid solution with a volume concentration of 50ml / L, hydrolyze it for 10min at the temperature of the acid solution at 80°C, and then wash it with water until neutral;

[0034] c. Palladium salt activation: put the meta-aramid fiber (1313) treated with palladium salt acti...

Embodiment 2

[0039] The preparation method is carried out as follows:

[0040] a. Coarsening: put meta-aramid fibers (1313) with a fiber cross-sectional width of 1.12mm and a fiber cross-sectional thickness of 0.038mmmm into a mixture containing 200g of sodium hydroxide, 10g of absolute ethanol and the remainder water In the mixed solution, coarsen for 30 minutes at the temperature of the mixed solution at 100°C, and then wash with water until neutral;

[0041] b. Hydrolysis: Put the roughened aramid fiber in step a into a hydrochloric acid solution with a volume concentration of 200ml / L, hydrolyze it for 100min at the temperature of the acid solution at 40°C, and then wash it with water until neutral;

[0042] c. Palladium salt activation: put the meta-aramid fiber (1313) that has been activated by palladium salt in step b into 5ml of hydrochloric acid, 1g of palladium chloride, 10g of stannous chloride and remaining In the mixed solution of water, the palladium salt is activated for 10 ...

Embodiment 3

[0047] The preparation method is carried out as follows:

[0048] a. Coarsening: Put the meta-aramid fiber (1313) with a fiber section width of 0.8mm and a fiber section thickness of 0.055 into a mixed solution containing 100g of sodium hydroxide, 35g of absolute ethanol and water as the remainder. In the mixed solution, coarsen for 8 minutes under the condition that the temperature of the mixed solution is 80°C, and then wash with water until neutral;

[0049] b. Hydrolysis: Put the roughened aramid fiber in step a into a hydrochloric acid solution with a volume concentration of 120ml / L, hydrolyze it for 60min at the temperature of the acid solution at 60°C, and then wash it with water until neutral;

[0050] c. Palladium salt activation: put the meta-aramid fiber (1313) treated with palladium salt activation in step b into 15ml of hydrochloric acid, 0.5g of palladium chloride, 20g of stannous chloride and In the mixed solution with the remainder being water, the palladium s...

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Abstract

The invention provides a silvered aramid conductive fiber and a preparation method thereof. The preparation method is conducted according to the steps as follows: a. coarsening: coarsening the aramid fiber through putting the fiber into a mixed solution of sodium hydroxide, absolute ethanol and the balance of water, and neutralizing the fiber by rinsing; b. hydrolyzing: hydrolyzing the coarsened aramid fiber by putting the fiber into an acid solution; c. activation of palladium salt: activating the hydrolyzed aramid fiber subjected to activation of palladium salt in step b by putting the fiber into a mixed solution of hydrochloric acid, palladium chloride, stannous chloride and the balance of water; d. reducing: reducing the palladium salt activated aramid fiber in step c by putting the fiber into a mixed solution of hydrochloric acid, sodium hypophosphite and the balance of water; e. chemical silvering: chemical silvering the reduced aramid fiber in step d by putting the fiber into a chemical silvering solution of silver nitrate, sodium hydroxide, aqua ammonia, a complex agent, a reducing agent and the balance of water; f. drying: drying the chemical silvered aramid fiber in step e in the conventional manner to obtain the silvered aramid conductive fiber.

Description

technical field [0001] The invention belongs to the field of conductive fibers, and relates to an aramid silver-plated conductive fiber and a preparation method thereof. Background technique [0002] Because aramid fiber has the characteristics of low density, high strength, and good thermal stability, the conductive fiber prepared by using aramid fiber as the base material not only endows the aramid fiber with good conductivity, but also inherits the excellent performance of the aramid matrix. Other polyester-based silver-plated fibers are mainly used for home visits, medical treatment and sporting goods. Such products will melt, drip or burn when exposed to fire or high heat, which will easily cause secondary burns to users, and it is difficult to meet high-strength, high-resistance thermal performance requirements. Conductive fibers prepared from aramid fibers can also provide electromagnetic shielding materials for aerospace equipment. [0003] However, aramid fiber is...

Claims

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Application Information

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IPC IPC(8): D06M11/83D06M11/38D06M11/11D06M11/64D06M11/55D06M11/70D06M13/188D06M11/20D06M11/28D06M101/36
Inventor 朱焰焰张茂功郑杰马苹苹郭丽丽郭涵
Owner TIANNUO PHOTOELECTRIC MATERIAL
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