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A kind of carbon nanotube reinforced copper-based composite material and preparation method thereof

A copper-based composite material and carbon nanotube technology are applied in the carbon nanotube-reinforced copper-based composite material and its preparation, and in the field of copper-based composite materials, and can solve the safety hazards of tannic acid structure, large molecular weight, strong alkali, strong oxidant, Cumbersome process and other problems, to achieve the effect of improving electrical friction and wear performance, strength and impact resistance, good dispersion, and simple process

Active Publication Date: 2016-08-24
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, grafted tannic acid (C 76 h 52 o 46 ) Due to the complex structure and large molecular weight, the surface of carbon nanotubes introduces more C, H, O impurity elements
At the same time, the process needs to be pretreated with strong alkali and hydrogen peroxide. The process is cumbersome, and there are certain safety hazards in the use of strong alkali and strong oxidant.

Method used

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  • A kind of carbon nanotube reinforced copper-based composite material and preparation method thereof
  • A kind of carbon nanotube reinforced copper-based composite material and preparation method thereof
  • A kind of carbon nanotube reinforced copper-based composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add multi-walled carbon nanotubes to 10mg / 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 0.1g: 40ml; let it stand for 24h, filter, and take the filter residue at 60 and dried under vacuum for 2 h at °C to obtain surface-modified carbon nanotubes.

[0042] figure 1 Low magnification (×10000) SEM images of carbon nanotubes (CNTs) before and after treatment with aqueous gallic acid: a. SEM image without gallic acid aqueous solution treatment; b. SEM image after gallic acid aqueous solution treatment. figure 2 High magnification (×50000) SEM images of carbon nanotubes (CNTs) before and after treatment with gallic acid aqueous solution: a. SEM image without gallic acid aqueous solution treatment; b. SEM image after gallic acid aqueous solution treatment. from figure 1 with 2 It can be seen that the carbon nanotubes without gallic acid aqueous solution are agglomera...

Embodiment 2

[0046] Add single-walled carbon nanotubes to 3mg / 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 it stand for 12h, filter, and take the filter residue at 70 °C for 1 h in vacuum to obtain surface-modified carbon nanotubes.

[0047] Evenly disperse 0.1 g of the surface-modified carbon nanotubes prepared in this example in 100 ml of deionized water. After standing for 3 days, the precipitation gradually increases under the action of gravity, but the carbon nanotubes still maintain a dispersed state without occurrence of reunion. It shows that the surface-modified carbon nanotubes prepared in Example 2 have excellent dispersibility.

Embodiment 3

[0049] Add multi-walled carbon nanotubes to 18mg / 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; 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.

[0050] Evenly disperse 0.1 g of the surface-modified carbon nanotubes prepared in this example in 100 ml of deionized water. After standing for 2 days, the precipitation gradually increases under the action of gravity, but the carbon nanotubes still maintain a dispersed state without occurrence of reunion. It shows that the surface-modified carbon nanotubes prepared in Example 2 have excellent dispersibility.

[0051] 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 for 5 days, and the carbon nanotubes were ...

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Abstract

The invention discloses a carbon nanotube-reinforced copper-based composite material. The copper-based composite material comprises the following components by weight percentage: 1-9% of surface-modified carbon nanotubes, 2-5% of graphite powder, Ti 3 SiC 2 The powder is 6-15%, and the balance is copper powder; wherein the surface-modified carbon nanotube is obtained by modifying the carbon nanotube with gallic acid aqueous solution. In the copper-based composite material of the present invention, the surface-modified carbon nanotubes have good dispersibility, low impurity content, and maintain a complete length-to-diameter ratio. Compared with graphite powder, Ti 3 SiC 2 The powder and copper powder play a co-reinforcement effect, which significantly improves the electrical friction and wear properties of the copper matrix composite, and also has excellent strength and impact resistance. The invention also discloses a preparation method of the copper-based composite material. The method has simple process, is easy to produce, and has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, 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, optical, and hydrogen storage 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 is that carbon nanotubes, like oth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00C22C1/05C22C9/00
Inventor 蒋小松邵甄胰蒋佳芯刘晚霞李景瑞朱德贵章曼
Owner SOUTHWEST JIAOTONG UNIV
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