Carbon nanotube reinforced copper-based composite material and preparation method thereof

A technology of copper-based composite materials and carbon nanotubes, applied in the field of composite materials, can solve problems such as environmental pollution, performance degradation of carbon nanotube materials, and application difficulties

Inactive Publication Date: 2016-08-17
CHENGDU TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the difficulties in the application of carbon nanotube materials in copper-based composite materials in the prior art. In the process of use, there are often problems of performance degradation or environmental pollution of carbon nanotube materials, and provide a carbon nanotube reinforced copper composite material. matrix composite

Method used

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  • Carbon nanotube reinforced copper-based composite material and preparation method thereof
  • Carbon nanotube reinforced copper-based composite material and preparation method thereof
  • Carbon nanotube reinforced copper-based composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Preparation of modified carbon nanotubes

[0048] Add multi-walled carbon nanotubes to 10 μg / mL gallic acid aqueous solution, disperse evenly, let stand for 24 hours, filter, collect the filter residue and dry it in vacuum at 60°C for 2 hours to obtain surface-modified carbon nanotubes. Wherein the ratio of the weight of the carbon nanotube to the volume of the gallic acid aqueous solution is 0.5g:60mL.

[0049] Evenly disperse 0.1 g of the surface-modified carbon nanotubes prepared in Example 1 in 100 mL of deionized water. After standing for 5 days, the precipitation gradually increases under the action of gravity, but the carbon nanotubes still maintain a dispersed state, and no Agglomeration; at the same time, compared with unmodified carbon nanotubes, precipitation occurred after standing for 1 day, and agglomeration occurred between carbon nanotubes, indicating that the surface-modified carbon nanotubes prepared in Example 1 have excellent dispersibility .

Embodiment 2

[0051] Preparation of modified carbon nanotubes

[0052] Add multi-walled carbon nanotubes to 3 μg / mL gallic acid aqueous solution, and disperse evenly, wherein the ratio of the weight of carbon nanotubes to the volume of gallic acid aqueous solution is 0.5g: 60mL; let stand for 12h, filter, and take the filter residue at 70 and dried under vacuum for 1 h at °C to obtain surface-modified carbon nanotubes.

[0053] Disperse 0.1 g of the surface-modified carbon nanotubes prepared in this example evenly in 100 mL of deionized water. After standing for 3 days, the precipitation gradually increased under the action of gravity, but the carbon nanotubes remained dispersed and did not agglomerate. . It shows that the surface-modified carbon nanotubes prepared in Example 2 have excellent dispersibility.

Embodiment 3

[0055] Preparation of modified carbon nanotubes

[0056] Add multi-walled carbon nanotubes to 18 μg / mL gallic acid aqueous solution, and disperse evenly, wherein the ratio of the weight of carbon nanotubes to the volume of gallic acid aqueous solution is 0.05g: 20mL; let it stand for 30h, filter, and take the filter residue at 80 and dried under vacuum for 3 h at °C to obtain surface-modified carbon nanotubes.

[0057] Disperse 0.1 g of the surface-modified carbon nanotubes prepared in this example evenly in 100 mL of deionized water. After standing for 2 days, the precipitation gradually increased under the action of gravity, but the carbon nanotubes remained dispersed and did not agglomerate. . It shows that the surface-modified carbon nanotubes prepared in Example 2 have excellent dispersibility.

[0058] From Examples 1 to 3, it can be seen that the surface-modified carbon nanotubes prepared in Example 1 gradually precipitated under the action of gravity after standing...

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Abstract

The invention discloses a carbon nanotube reinforced copper-based composite material. The carbon nanotube reinforced copper-based composite material is prepared from, by weight, 0.5%-5% of surface-modified carbon nanotubes, 2%-5% of graphite, 6%-15% of Ti3SiC2, 2%-5% of boron nitride (BN), 0.01%-0.5% of rare earth element La and the balance copper. The surface-modified carbon nanotubes are carbon nanotubes of which the surfaces are grafted with gallic acid. According to the copper-based composite material, the surface-modified carbon nanotubes are used, the carbon nanotubes are good in dispersity, the bonding area with a copper matrix is large, the reinforcement effect is good, a better stress transfer effect can be achieved, stress concentration is reduced, and defects are reduced. In addition, the carbon nanotubes, graphite powder, Ti3SiC2 powder and BN powder exert the synergistic reinforcement effect in the copper matrix, the mechanical property and friction-resistant and wear-resistant properties of the copper-based composite material are significantly improved, and meanwhile the copper-based composite material has excellent strength and impact resistance. The invention further discloses a preparation method of the copper-based composite material. The method is simple in process, production is easy, and the method has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of composite materials, and relates to a copper-based composite material, in particular to a carbon nanotube-reinforced copper-based composite material and a preparation method thereof. Background technique [0002] Since carbon nanotubes were discovered by Iijima, a scientist from Japan's NEC Corporation in 1991, they have attracted the attention of scholars for their unique one-dimensional structure and unique electrical and optical properties. Carbon nanotubes have excellent characteristics such as extremely high mechanical strength, ideal elasticity, low thermal expansion coefficient, and small size, making them the most potential reinforcement materials. [0003] Carbon nanotubes have made rapid progress in strengthening polymer composites, but there are still many difficulties in strengthening metal matrix composites. The main difficulty in this is that carbon nanotubes, like other nanomaterials, have a large a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C32/00C22C1/05C22C1/10
CPCC22C9/00C22C1/05C22C1/1005C22C32/0047C22C32/0084C22C2026/002
Inventor 邵甄胰蒋佳芯宋庭丰张归航李峰蒋小松朱德贵
Owner CHENGDU TECH UNIV
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