Preparation method and application of graphene copper / steel composite material

A composite material and graphene technology, applied in the direction of electrolytic coating, coating, etc., can solve the problems of reducing the conductivity of the copper layer, poor bonding quality between the copper layer and the steel core, and low conductivity, so as to prevent the occurrence of defects, The structure of graphene copper coating is fine and uniform, and the effect of saving cost and time

Active Publication Date: 2018-08-14
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electroplating method also has the following disadvantages: 1. Impurities are mixed in the copper layer, which reduces the conductivity of the copper layer; 2. The cyanide plating solution is toxic and is not conducive to environmental protection; 3. The bonding quality between the copper layer and the steel core poor
It can be seen from this that the conductivity of the copper-clad steel used for the inner conductor of the traditional coaxial cable is not high, and its conductivity needs to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The concentration ratio of the graphene copper plating solution is: copper sulfate 220g / L, graphene 0.1g / L, nonionic surfactant 0.1g / L, and the mass ratio of graphene powder to nonionic surfactant is 1:1 , the balance is deionized water; the process environment of the plating solution is: temperature 20 ° C, solution pH = 5.0; pulse electrical parameters are: current density 500A / m 2 , the pulse current frequency is 250Hz, the pulse width is 25s, and the electroplating is 0.5h. The graphene copper coating prepared under such a ratio, process environment and electrical parameters has a bright surface, no holes, and a uniform thickness. The volume ratio of graphene copper in the obtained graphene copper / steel composite is 10%, and the graphene copper coating is well bonded to the interface of the steel core wire; in addition, the conductivity of the graphene copper / steel composite is 50.7% IACS.

Embodiment 2

[0027] When the concentration ratio of graphene copper plating solution is: copper sulfate 250g / L, graphene 1g / L, nonionic surfactant 1.5g / L, the mass ratio of graphene and nonionic surfactant is 1:1.5, The balance is deionized water; the process environment of the plating solution is: temperature 40 ° C, solution pH = 3.0; pulse electrical parameters are: current density 1000A / m 2 , the pulse current frequency is 250Hz, the pulse width is 25s, and the electroplating is 2h. The graphene copper coating prepared under such a ratio, process environment and electrical parameters has a bright surface, no holes, and a uniform thickness. The volume ratio of graphene copper in the obtained graphene copper / steel composite is 15%, and the graphene copper coating is well combined with the steel core wire interface; in addition, the conductivity of the graphene copper / steel composite is 58.8% IACS.

Embodiment 3

[0029] When the concentration ratio of graphene copper plating solution is: copper sulfate 280g / L, graphene 2g / L, nonionic surfactant 4g / L, the mass ratio of graphene and nonionic surfactant is 1:2, remaining The amount is deionized water; the process environment of the plating solution is: temperature 60 ° C, solution pH = 3.0; pulse electrical parameters are: current density 2000A / m 2 , the pulse current frequency is 250Hz, the pulse width is 25s, and the electroplating is 2h. The graphene copper coating prepared under such a ratio, process environment and electrical parameters has a bright surface, no holes, and a uniform thickness. The volume ratio of graphene copper in the obtained graphene copper / steel composite is 20%, and the graphene copper coating is well bonded to the steel core wire interface; in addition, the conductivity of the graphene copper / steel composite is 65.5% IACS.

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PUM

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Abstract

An electroplating solution of a graphene copper / steel composite material comprises 220-280 g / L of copper sulfate, 0.1-3.0 g / L of graphene, 0.1-6.0 g / L of nonionic surfactants and deionized water. In the process of electroplating, sinusoidal pulse is used; and according to the electrical parameter of the sinusoidal pulse, the current density range is 500-3000A / m<2>, the pulse current frequency is 250Hz, the pulse width is 25s, the use time of the electroplating is 0.5-4.0h, the temperature of the electroplating solution is 20-70 DEG C, and the pH is 2.0-5.0. The copper sulfate-grapheme platingsolution is non-toxic and recyclable, the cost is saved, and environmental protection is achieved; the surface of an obtained graphene copper plating is bright and has high bonding strength with a steel core wire; and the volume ratio of graphene copper in the obtained graphene copper / steel composite material is 10-25%, the conductivity of the composite material is obviously higher than that of acopper-clad steel composite material for a conductor in a traditional coaxial-cable, and the graphene copper / steel composite material is suitable for manufacturing conductors in coaxial cables for transmitting high-frequency signals.

Description

technical field [0001] The invention belongs to the technical field of steel core wire surface fine chemical industry, and in particular relates to a preparation method and application of a graphene copper / steel composite material. Background technique [0002] In recent years, with the rapid development of communication and power transmission equipment, the application of communication coaxial cables in the transmission of high-frequency signals has become more and more popular. Coaxial cables will produce skin effect when transmitting high-frequency signals, and the skin effect increases with the increase of signal frequency. The so-called skin effect means that when the transmission signal frequency is as high as several thousand hertz or tens of thousands of hertz, the signal will be transmitted on the outer surface of the inner conductor of the coaxial cable and the inner surface of the outer conductor; and the higher the signal frequency, the skin depth smaller. In o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/58C25D5/18C25D7/06C25D15/00
CPCC25D3/58C25D5/18C25D7/0607C25D15/00
Inventor 魏坤霞周浩然魏伟杜庆柏胡静
Owner CHANGZHOU UNIV
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