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Method for preparing aramid composite conductive fibers with nickel/copper coatings

A technology of aramid fiber and composite conduction, which is applied in fiber treatment, textiles and papermaking, etc. It can solve the problems of poor bonding between the coating and the fiber matrix, and achieve a soft hand feeling effect

Inactive Publication Date: 2015-09-23
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conductive fibers based on aramid fiber are rarely reported, and there are many defects, and the bonding force between the coating and the fiber matrix is ​​very poor

Method used

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  • Method for preparing aramid composite conductive fibers with nickel/copper coatings
  • Method for preparing aramid composite conductive fibers with nickel/copper coatings

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The preparation process and steps in this embodiment are as follows:

[0036] (1) Degrease, put the aramid fiber into the acetone solution, take it out after ultrasonic cleaning for 60 minutes, and rinse it with deionized water.

[0037] (2) Pretreatment, immerse the fiber in a dimethyl sulfoxide aqueous solution containing 5 g / L silver nitrate, where the volume concentration of dimethyl sulfoxide in the dimethyl sulfoxide aqueous solution is 30%, and take it out after soaking at 100 ℃ for 1 hour ;

[0038] (3) Reduction: Put the pretreated fiber into 15g / L sodium borohydride solution for reduction treatment at a temperature of 20 ℃, and take it out after 60 min;

[0039] (4) Electroless nickel plating. Put the reduced fiber into the nickel plating solution. The composition of the electroless nickel plating solution is: nickel sulfate 40g / L, sodium hypophosphite 10g / L, dimethylaminoborane 10g / L, Sodium citrate 30 g / L, ammonia water 15ml / L, bath temperature 40 ℃, plating time ...

Embodiment 2

[0042] The preparation process and steps in this embodiment are as follows:

[0043] (1) Degrease, put the aramid fiber into acetone solution, take it out after ultrasonic cleaning for 40 minutes, and rinse it with deionized water.

[0044] (2) Pretreatment: immerse the fiber in a 30 g / L silver nitrate aqueous solution of dimethyl sulfoxide, where the volume concentration of dimethyl sulfoxide in the dimethyl sulfoxide aqueous solution is 20%, and take it out after soaking at 60°C for 2 hours;

[0045] (3) Reduction, put the pretreated fiber into 5g / L potassium borohydride solution for reduction treatment at a temperature of 50 ℃, and take it out after 30 min;

[0046] (4) Electroless nickel plating. Put the reduced fiber into the nickel plating solution. The composition of the electroless nickel plating solution is: nickel sulfate 15g / L, sodium hypophosphite 20 g / L, dimethylaminoborane 3g / L, Sodium citrate 20 g / L, ammonia water 5ml / L, bath temperature is 60 ℃, plating time is 1h;

[...

Embodiment 3

[0049] The preparation process and steps in this embodiment are as follows:

[0050] (1) Degrease, put the aramid fiber into the acetone solution, take it out after ultrasonic cleaning for 80 minutes, and rinse it with deionized water.

[0051] (2) Pretreatment: immerse the fiber in a 50g / L silver nitrate aqueous solution of dimethyl sulfoxide, where the volume concentration of dimethyl sulfoxide in the dimethyl sulfoxide aqueous solution is 10%, and take it out after soaking at 30 ℃ for 4 hours;

[0052] (3) Reduction: Put the pretreated fiber into 25g / L sodium borohydride solution for reduction treatment at a temperature of 35 ℃, and take it out after 20 minutes;

[0053] (4) Electroless nickel plating. Put the reduced fiber into a nickel plating solution. The composition of the electroless nickel plating solution is: nickel sulfate 25g / L, sodium hypophosphite 15g / L, dimethylaminoborane 6g / L, Sodium citrate 25 g / L, ammonia water 10ml / L, plating bath temperature 80 ℃, plating time 1...

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Abstract

The invention relates to a method for preparing aramid composite conductive fibers with nickel / copper coatings and palladium-free activation method. The preparation method includes the steps: (a) washing and deoiling; (b) adopting a pretreatment reagent for pretreatment of fiber surfaces to enable the fibers to swell, wherein the fiber surfaces adsorb metal ions with catalytic activity after reduction to increase fiber surface area and improve wettability; (c) reducing; (d) chemical nickel plating; (e) chemical copper plating. The aramid composite conductive fibers with the nickel / copper coatings has the advantages that the coatings and fiber bodies are strong in binding force, the coatings are stable in chemical property and less prone to oxidation, excellent conductivity can be kept constantly, and high strength, flexibility, light weight, flame retardancy and heat resistance are realized. The composite conductive fibers can be used for preparation of anti-static and electromagnetic shielding fabrics and conductor materials and shielding layers of special cables. In addition, compared with a palladium activation method, the palladium-free activation method has the advantages of economy, simplicity and convenience in operation and the like.

Description

technical field [0001] The invention provides a method for preparing an aramid nickel-plated / copper double-coated composite conductive fiber. This process uses the chemical plating method to plate a metal conductive thin layer on the surface of the aramid fiber, thereby endowing the fiber with antistatic and conductive functions, while retaining the inherent characteristics of the fiber such as light weight, high strength, heat resistance and flame retardancy, and soft hand feeling. New composite materials. It can be widely used in special fields such as aviation, aerospace, navigation, military industry, medical treatment, etc., as electromagnetic shielding materials and lightweight conductive materials for personal protection. Simultaneously, the invention provides a palladium-free activation method for electroless nickel / copper double plating. Background technique [0002] Aromatic polyamide fiber is referred to as aramid fiber for short, and it is Aramid fiber in Engli...

Claims

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Application Information

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IPC IPC(8): D06M11/83D06M11/80C23C18/36C23C18/40D06M101/36
Inventor 白瑞成庞宏伟高宇芳唐志勇邵勤思李爱军
Owner SHANGHAI UNIV