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Preparation method of carbon-nanotube-enhanced copper-based composite material

A technology of copper-based composite materials and carbon nanotubes, applied in electrolytic coatings, coatings, etc., to achieve the effect of ensuring integrity and high bonding strength

Active Publication Date: 2018-01-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a method for preparing carbon nanotube-reinforced copper-based composite materials, which combines electrodeposition and powder metallurgy to prepare carbon nanotube-reinforced copper-based composite materials, effectively solving the problem of carbon nanotube-reinforced copper-based composite materials. The uniform dispersion in the copper matrix effectively ensures the integrity of the carbon nanotubes, and the prepared carbon nanotube-reinforced copper-based composites have the characteristics of high density and high performance

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  • Preparation method of carbon-nanotube-enhanced copper-based composite material

Examples

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Embodiment 1

[0024] Embodiment 1: a kind of preparation method of carbon nanotube reinforced copper-based composite material, concrete steps are:

[0025] (1) Put the multi-walled carbon nanotubes (the purity of the multi-walled carbon nanotubes is not less than 95%) in the acid solution for ultrasonic dispersion treatment for 30 minutes, heat to a temperature of 65°C and treat at a constant temperature for 10 hours, after filtering, washing and drying Obtain pretreated carbon nanotubes, wherein the acid solution is a mixed acid solution of concentrated sulfuric acid and concentrated nitric acid, and the volume ratio of the concentrated sulfuric acid and concentrated nitric acid in the acid solution is 3:1;

[0026] (2) Add the pretreated carbon nanotubes obtained in step (1) to the copper salt solution to prepare a carbon nanotube / copper salt composite solution, wherein the concentration of carbon nanotubes in the carbon nanotube / copper salt composite solution is 2g / L , the copper salt is...

Embodiment 2

[0031] Example 2: The preparation method of the carbon nanotube-reinforced copper-based composite material in this example is basically the same as in Example 1, except that the concentration of the carbon nanotubes in the carbon nanotube / copper salt composite solution in step (2) is 1g / L;

[0032] The microscopic morphology of the carbon nanotube-reinforced copper-based composite film of this embodiment is as follows: figure 2 shown, from figure 2 It can be seen that the carbon nanotubes are evenly distributed and embedded on the copper matrix, and the bonding between the carbon nanotubes and the copper matrix is ​​good, and some longer carbon nanotubes connect multiple copper grains in series, which helps the stress in the composite material matrix after sintering. effective delivery of

[0033] The cross-sectional microscopic morphology of the carbon nanotube-reinforced copper-based composite material of this embodiment is as follows Figure 4 shown, from Figure 4 It...

Embodiment 3

[0035] Example 3: The preparation method of the carbon nanotube-reinforced copper-based composite material in this example is basically the same as that in Example 1, except that the cathode current density during electrodeposition in step (3) is 2A / dm 2 ;

[0036] The microscopic morphology of the carbon nanotube-reinforced copper-based composite film of this embodiment is as follows: image 3 shown, from image 3 It can be seen that the carbon nanotubes are evenly distributed and embedded on the copper substrate, and the carbon nanotubes and the copper substrate are well bonded. Compared with Example 1, the average grain size of copper decreases due to the increase of the current density;

[0037] The relative density of the carbon nanotube-reinforced copper-based composite material prepared in this example is 97.3%, and the tensile strength is 267MPa.

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Abstract

The invention relates to a preparation method of a carbon-nanotube-enhanced copper-based composite material, and belongs to the technical field of composite material preparation. The method comprises:putting carbon nanotubes in an acid solution, performing ultrasonic dispersion treatment for 20-120 min, performing heating to 50-80 DEG C, maintaining the constant temperature for 5-15 h, and performing filtering, washing, and drying to obtain pre-treated carbon nanotubes; preparing a carbon nanotube and copper salt composite solution with the pre-treated carbon nanotubes; taking a pure titaniumplate as a cathode, a pure copper plate as an anode, the carbon nanotube and copper salt composite solution as a plating solution, performing electroplating at the temperature of 25-50 DEG C with thecurrent density of the cathode being 0.5-20 A / dm2; when the deposition electric quantity is 50-200 C, taking the cathode out, peeling a composite film off, and cleaning and drying the composite filmto obtain carbon-nanotube-enhanced copper-based composite film; laying the composite films layer by layer, and performing compacting molding to obtain a carbon-nanotube-enhanced copper-based compositeblock; and sintering the composite block to obtain the carbon-nanotube-enhanced copper-based composite material. In the composite material, carbon nanotubes are uniformly distributed in the compositefilm layer in a network manner.

Description

technical field [0001] The invention relates to a method for preparing a carbon nanotube-reinforced copper-based composite material, which belongs to the technical field of composite material preparation. Background technique [0002] Since the discovery of carbon nanotubes, due to their unique structure, excellent mechanical, electrical and thermal properties, good thermal stability and corrosion resistance, they have attracted extensive research interest. At the same time, carbon nanotubes are also regarded as ideal reinforcements for composite materials, and have become a research hotspot in the field of materials science. [0003] The excellent properties of carbon nanotubes make them have broad application prospects. At present, their applications in composite materials, lithium battery materials, hydrogen storage materials, and bioengineering have been reported. Carbon nanotube-reinforced copper-based composite materials can be used in contacts, welding electrodes and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C1/10C22C9/00C22C26/00C25D15/00
Inventor 陶静梅陈小丰易健宏鲍瑞李才巨刘意春游昕谈松林李凤仙
Owner KUNMING UNIV OF SCI & TECH
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