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Method for chemical silver-plating of aramid conductive fibers

A technology of chemical silver plating and conductive fiber, which is applied in the direction of liquid chemical plating, fiber type, fiber treatment, etc. It can solve the problems of affecting the conductivity and durability of fibers, the metal coating is easy to fall off, and the reactivity is low, so as to reduce the process and pollution, excellent plating fastness, high electrical conductivity

Inactive Publication Date: 2015-04-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristics of smooth fiber surface, lack of active groups, and low reactivity, it is difficult to directly deposit electroless metal plating on the surface of the fiber, and the bonding force between the fiber and the metal coating is poor, and the metal coating is easy to fall off, which affects the conductivity and durability of the fiber. sex
"Preparation and Performance Research of Silver-plated Conductive Aramid Fiber" by Liang Jingjing et al. used a metallization reagent (NaH-DMSO) in the silver-plating process. This reagent is flammable and explosive, and cannot meet the requirements of large-scale industrial production needs
The patent 201310685423.7 "Aramid silver-plated conductive fiber and its preparation method" invented by Zhu Yanyan and others uses the traditional method of roughening, sensitization, activation and then chemical silver plating. Tin and 0.1-1g of palladium chloride, stannous chloride is harmful to the environment, palladium is a precious metal, expensive

Method used

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  • Method for chemical silver-plating of aramid conductive fibers
  • Method for chemical silver-plating of aramid conductive fibers
  • Method for chemical silver-plating of aramid conductive fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Prepare an acidic potassium permanganate solution, containing 3 g of potassium permanganate and 100 g of sulfuric acid per liter of the solution, immerse the aramid fiber, ultrasonically treat it for 40 minutes at 20° C., then take out the fiber, wash it, and dry it.

[0029] (2) dissolving chitosan with the acetic acid solution of 1% with mass fraction, chitosan solution concentration 5g / L, control temperature at 0 ℃, add dropwise 15ml formaldehyde solution with the speed of 10s / drop, stirring process 20 minutes, then Immerse the aramid fibers, raise them to room temperature, pad them with a liquid removal ratio of 60%, and then bake them at 120°C.

[0030] (3) Prepare a 50mg / L palladium chloride solution, immerse the fabric at 40°C for 60 minutes, and dry at 50°C.

[0031] (4) First prepare silver ammonia solution: 10g / L AgNO 3 , add ammonia water dropwise until clarified; then prepare reducing solution: glucose 20g / L, tartaric acid 0.05g / L, ethanol 100mL / L, eth...

Embodiment 2

[0036] (1) Prepare an acidic potassium permanganate solution, containing 8 g of potassium permanganate and 100 g of nitric acid per liter of the solution, immerse the aramid fiber, ultrasonically treat it for 30 minutes at 30° C., then take out the fiber, wash it, and dry it.

[0037] (2) dissolving chitosan with a mass fraction of 2% acetic acid solution, chitosan solution concentration 10g / L, control temperature at 5°C, add 10ml glutaraldehyde solution dropwise at a speed of 10s / drop, and stir for 20 minutes , and then immersed in the aramid fiber, raised to room temperature, padding, the rate of liquid extrusion is 80%, and then baked at 140°C.

[0038] (3) Prepare 80mg / L palladium chloride solution, soak the fabric for 60 minutes at 40°C, and dry at 50°C.

[0039] (4) First prepare silver ammonia solution: 20g / L AgNO 3 , add ammonia water dropwise until clarified; then prepare a reducing solution: glucose 60g / L, tartaric acid 3g / L, ethanol 150mL / L, ethylenediamine 20mL / L....

Embodiment 3

[0044] (1) Prepare an acidic potassium permanganate solution, containing 10 g of potassium permanganate and 150 g of phosphoric acid per liter of the solution, immerse the aramid fibers, ultrasonically treat them for 20 minutes at 50° C., then take out the fibers, wash them, and dry them.

[0045] (2) dissolving chitosan with a mass concentration of 3% acetic acid solution, chitosan solution concentration 15g / L, control temperature at 10°C, add 5ml of adipaldehyde solution dropwise at a speed of 10s / drop, and stir for 20 minutes , and then immersed in the aramid fiber, raised to room temperature, padding, the liquid rolling rate is 100%, and then baked at 160 ° C.

[0046] (3) Prepare a 100mg / L palladium chloride solution, immerse in the fabric at 40°C for 60 minutes, and dry at 50°C.

[0047] (4) First prepare silver ammonia solution: 30g / L AgNO 3 , add ammonia water dropwise until clarified; then prepare reducing solution: glucose 80g / L, tartaric acid 5g / L, ethanol 200mL / L,...

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Abstract

The invention relates to a method for chemical silver-plating of aramid conductive fibers. The method comprises the following steps: (1) preparing an acidic potassium permanganate solution, soaking aramid fibers, performing supersonic treatment at 20-50 DEG C for 20-40 minutes, then taking out the fibers, washing and drying; (2) dropwise adding a crosslinking agent into a chitosan solution under a low-temperature condition, stirring, soaking the aramid fibers, heating to room temperature, padding and baking; (3) preparing a palladium chloride solution, soaking the aramid fibers, and drying; and (4) preparing a silver-plating solution, soaking the aramid fibers, performing chemical silver-plating, and drying. The aramid conductive fibers prepared by the method provided by the invention are small in strength loss and high in conductivity (the fiber resistance is less than or equal to 0.4 ohm / cm), the reaction condition is mild, and the treatment method is simple, convenient and feasible.

Description

technical field [0001] The invention belongs to the field of fiber silver plating, in particular to a method for chemical silver plating of aramid conductive fibers. Background technique [0002] Aramid fiber is a high-performance polymer synthetic material with excellent properties such as high strength, high modulus, high temperature resistance, flame retardancy, and chemical stability. Therefore, it is widely used in military industry, protection field, industrial field and so on. The macromolecular structure of poly-p-phenylene terephthalamide fiber (referred to as para-aramid fiber) is a nearly rigid straight-chain polymer formed by amide bonds at the para-position of the benzene ring. The chemical formula is as follows: [0003] [0004] Plating a conductive metal layer on the surface of the aramid fiber to metallize the fiber surface can make it have the functions of eliminating static electricity, conducting electricity, and electromagnetic shielding, and has the...

Claims

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Application Information

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IPC IPC(8): D06M11/83D06M11/50D06M11/55C23C18/44D06M101/36
Inventor 俞丹穆世鹏饶竹君田魏成刘玲玲王炜
Owner DONGHUA UNIV
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