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Process for preparing micro-coiled carbon fiber/Ni composite material by chemical nickel plating

A technology of electroless nickel plating and composite materials, which is applied in the field of electroless nickel plating to prepare micro-helical carbon fiber/Ni composite materials, which can solve problems such as difficult to solve the uniformity of the plating layer and affect the application of micro-helical carbon fiber composite materials, so that it is not easy to deteriorate , easy to operate, and stable plating solution

Inactive Publication Date: 2008-10-15
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the special morphology of the micro-helical carbon fiber, the uniformity of the coating is difficult to solve, which affects the application of the micro-helical carbon fiber composite material.

Method used

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  • Process for preparing micro-coiled carbon fiber/Ni composite material by chemical nickel plating
  • Process for preparing micro-coiled carbon fiber/Ni composite material by chemical nickel plating
  • Process for preparing micro-coiled carbon fiber/Ni composite material by chemical nickel plating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Use a high-power ultrasonic disperser to disperse the micro-helical carbon fiber particles to a diameter of 2-8 μm and a length of 10-100 μm to obtain a micro-helical carbon fiber in the form of powder. Weigh 1g of micro-helical carbon fiber into 100ml concentrated nitric acid, and add magnetic stirring to roughen it, take it out after 72h, and rinse it with deionized water to neutral to obtain micro-helical carbon fiber with clean and rough surface particles.

[0029] (2) Put the roughened micro-spiral carbon fiber into 30g / L SnCl 2 , in 60ml / L concentrated hydrochloric acid solution, sensitized by ultrasonic vibration at room temperature for 30min, and washed until neutral.

[0030] (3) Add the sensitized microhelical carbon fiber to 0.5g / L PdCl 2 , 10ml / L concentrated hydrochloric acid solution, activated by ultrasonic vibration at room temperature for 30min, washed until neutral, and dried.

[0031] (4) According to 20g of nickel sulfate, 20g of sodium hypoph...

Embodiment 2

[0034] (1) Weigh 1 g of the micro-helical carbon fiber particles prepared in Example 1, put them into 100 ml of concentrated sulfuric acid, and stir them with a magnetic force to coarsen them, take them out after 24 hours, rinse them with deionized water, and dry them.

[0035] (2) Put the roughened micro-spiral carbon fiber into 50g / L SnCl 2 , in 80ml / L concentrated hydrochloric acid solution, sensitized by ultrasonic vibration at room temperature for 10min, and washed until neutral.

[0036] (3) Add the sensitized microhelical carbon fiber to 1.0g / L PdCl 2 , in 30ml / L concentrated hydrochloric acid solution, activated by ultrasonic vibration at room temperature for 10min, washed until neutral, and dried.

[0037] (4) According to 30g of nickel sulfate, 25g of sodium hypophosphite, 20g of ammonium chloride, 60g of sodium citrate, 80mg of surfactant sodium dodecylbenzenesulfonate, 10mg of stabilizer thiourea, prepare 1000ml of plating solution, pH The value is adjusted to ab...

Embodiment 3

[0040] (1) Weigh 1 g of the microhelical carbon fiber particles prepared in Example 1 and put them into 100 ml of mixed acid (concentrated nitric acid:concentrated sulfuric acid: 3:1), and magnetically stir for 12 hours, rinse with deionized water, and dry.

[0041] (2) Put the roughened micro-spiral carbon fiber into 10g / L SnCl 2 , in 20ml / L concentrated hydrochloric acid solution, sensitized by ultrasonic vibration at room temperature for 60min, and washed until neutral.

[0042] (3) Add the sensitized microhelical carbon fiber to 0.1g / L PdCl 2 , 50ml / L concentrated hydrochloric acid solution, activated by ultrasonic vibration at room temperature for 60min, rinsed until neutral, and dried.

[0043] (4) According to nickel sulfate 40g, sodium hypophosphite 40g, ammonium chloride 50g, sodium citrate 100g, surfactant sodium dodecylbenzene sulfonate 50mg, stabilizer thiourea 1mg, prepare the plating solution 1000ml, pH The value is adjusted to about 8.0 with ammonia water or 1...

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Abstract

The invention relates to a method for preparing a micro-coiled carbon fiber / Ni composite material by utilization of chemical nickel plating. The method is characterized in that: firstly, surface roughenine treatment for micro-coiled carbon fiber particles is performed; sensibilization is performed in SnCl2 hydrochloric acid solution; activation is performed in PdCl2 hydrochloric acid solution; secondly, chemical nickel plating is performed. Plating solution for chemical nickel plating is prepared by nickel salt, sodium citrate, ammonium chloride, sodium hypophosphate, thiourea and sodium dodecyl benzene sulfonate. The technological parameters of the plating solution are pH: 8.0 to 9.0; temperature: 50 to 90 DEG C; time: 10 to 60 minutes. Afterward, the micro-coiled carbon fiber / Ni composite material is prepared by sintering under the function of shielding gas. The method has the advantages that: the micro-coiled carbon fiber surface chemical nickel plating formula and technique are simple and convenient and easy to operate; the plating solution is stable and difficult to go bad; a micro-coiled carbon fiber surface cladding obtained is compact and uniform; the particle dispersibility is good; and the thickness of a micro-coiled carbon fiber / Ni composite material cladding prepared is easy to control.

Description

technical field [0001] The invention relates to a method for preparing micro-spiral carbon fiber / Ni composite material by electroless nickel plating, and belongs to the technical field of preparation of non-metallic powder surface metallization. Background technique [0002] Micro-helical carbon fiber is a new type of carbon material. Because of its unique three-dimensional helical structure, it has a large specific surface area, high electrical conductivity and dielectric constant, thereby increasing the ability to scatter and absorb electromagnetic waves. At the same time, it has a series of advantages such as low density, high specific strength, heat resistance, electrical and thermal conductivity, chemical stability, etc., and can be used as a reinforcement for composite materials, so micro-helical carbon fibers can be used for microwave absorption materials, electromagnetic shielding particles , high-performance reinforced composite materials and biosynthetic catalysts,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/16C23C18/18C23C18/24C23C18/28C23C18/30C23C18/32
Inventor 毕辉寇开昌吴海淮颜录科赵清新王召娣
Owner NORTHWESTERN POLYTECHNICAL UNIV
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