Preparation method of carbon nano tubes/copper composite powder based on comproportionation reaction

A technology of composite powder and carbon nanotubes, which is applied in the field of nanocomposite materials, can solve the problems of uniform dispersion of CNTs and firm bonding of the matrix interface, and achieve the effects of simple process, easy large-scale production, and high output

Active Publication Date: 2017-11-24
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At present, there is no powder making method that can make CNTs uniformly dispersed in the matrix and firmly bond with the matrix interface, and will not damage the CNTs, will not introduce impurities, is easy to control, and can be prepared in large quantities and repeatedly.

Method used

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  • Preparation method of carbon nano tubes/copper composite powder based on comproportionation reaction
  • Preparation method of carbon nano tubes/copper composite powder based on comproportionation reaction
  • Preparation method of carbon nano tubes/copper composite powder based on comproportionation reaction

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Effect test

Embodiment 1

[0031] Embodiment 1: A kind of carbon nanotube / copper composite powder preparation method based on anti-disproportionation reaction, concrete steps are as follows:

[0032] (1) Pretreatment of CNTs: Prepare a mixed acid solution of nitric acid and sulfuric acid, add the mixed acid solution to CNTs and heat-treat at 60°C for 12 hours, wash with deionized water until neutral, and dry to obtain the acidified pretreatment. Treated CNTs; wherein the CNTs are multi-wall graphitized CNTs, and the volume ratio of nitric acid to sulfuric acid is 3:1;

[0033] (2) Copper-based powder pretreatment: Add 300mL alcohol to 50g copper-based powder and perform ball milling for 10 hours, filter, wash, and dry in air to obtain pretreated copper-based powder; the copper-based powder is 300 mesh random shaped electrolytic copper powder, the ball milling speed is 300 r / min,

[0034] (3) Anti-disproportionation reaction adsorption: uniformly disperse the acidified pretreated CNTs obtained in step (...

Embodiment 2

[0037] Embodiment 2: A kind of carbon nanotube / copper composite powder preparation method based on anti-disproportionation reaction, concrete steps are as follows:

[0038] (1) Pretreatment of CNTs: prepare a mixed acid solution of nitric acid and sulfuric acid, add the mixed acid solution to CNTs and heat-treat CNTs at a temperature of 70°C for 2 hours, wash with deionized water until neutral, and dry to obtain the acidified pretreatment Treated CNTs; wherein the CNTs are single-walled CNTs, and the volume ratio of nitric acid to sulfuric acid is 1:3;

[0039] (2) Copper-based powder pretreatment: add 200mL alcohol to 50g copper-based powder and perform ball milling for 24 hours, filter, wash, and dry in the air to obtain the pretreated copper-based powder; the copper-based powder has a particle size of 500 mesh , the spherical copper powder produced by gas atomization, the ball milling speed is 200 r / min,

[0040] (3) Anti-disproportionation reaction adsorption: uniformly d...

Embodiment 3

[0043] Embodiment 3: A kind of carbon nanotube / copper composite powder preparation method based on anti-disproportionation reaction, the specific steps are as follows:

[0044] (1) Pretreatment of CNTs: prepare a mixed acid solution of nitric acid and sulfuric acid, add the mixed acid solution to CNTs and heat treatment in a water bath at a temperature of 80°C for 8 hours, wash with deionized water until neutral, and dry. Acidifying pretreated CNTs; wherein the CNTs are single-walled CNTs, and the volume ratio of nitric acid to sulfuric acid is 2:1;

[0045] (2) Copper-based powder pretreatment: add 200mL alcohol to 50g copper-based powder and perform ball milling for 15 hours, filter, wash, and dry in the air to obtain pretreated copper-based powder; the copper-based powder is 400-mesh gas atomization The Cu-1.0wt.% Ti alloy powder produced by the process, the ball milling speed is 250 r / min,

[0046] (3) Anti-disproportionation reaction adsorption: uniformly disperse the ac...

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Abstract

The invention relates to a preparation method of carbon nano tubes / copper composite powder based on a comproportionation reaction, and belongs to the technical field of nano composite materials. According to the preparation method, CNTs are uniformly dispersed and effectively inserted into nano Cu particle powder matrixes through the comproportionation reaction produced between copper oxide and copper. The preparation method comprises the steps of carrying out pretreatment on the CNTs, carrying out pretreatment on copper-based powder and carrying out comproportionation reaction adsorption. The preparation method has the advantages that the CNTs / Cu composite powder with the CNTs dispersed uniformly and the CNTs and the copper-based powder combined well can be prepared in a large scale, the operation is easy, the reliability is high, the repetitive rate is high, other impurities cannot be introduced, and an important technical support and a raw material foundation can be provided for preparing a CNTs reinforced copper-based composite material for a powder metallurgy method.

Description

technical field [0001] The invention relates to a method for preparing a carbon nanotube / copper composite powder based on an anti-disproportionation reaction, and belongs to the technical field of nanocomposite materials. Background technique [0002] Powder metallurgy technology is an important method for preparing CNTs / Cu composite materials. The process steps mainly include: preparation of CNTs / Cu composite powder and pressing and sintering of CNTs / Cu composite powder. Since powder preparation is a preliminary process, its microstructure characteristics It will inherit and affect the properties of the final CNTs / Cu composite bulk. For example, the dispersion of CNTs in the composite powders, and the interfacial bonding between CNTs and copper powders are preserved into the bulk composites. However, due to the very large aspect ratio and high specific surface energy of CNTs, they are prone to agglomeration and entanglement with each other, making it difficult to uniformly...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/04B22F9/16
CPCB22F1/0003B22F9/04B22F9/16B22F2009/043
Inventor 鲍瑞刘亮易健宏
Owner KUNMING UNIV OF SCI & TECH
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