A preparation method of hydrogen-etched carbon nanotube-reinforced copper-based composite material

A technology of copper-based composite materials and carbon nanotubes, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of increased effective contact area and poor plasticity, and achieve improved wettability, improved tensile plasticity, and improved dispersion The effect of uniformity

Active Publication Date: 2021-05-11
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with carbon nanotubes, graphene with a two-dimensional structure has a larger specific surface area, and when used as a reinforcement of a composite material, the effective contact area with the matrix is ​​greatly increased, which can effectively improve the interface bonding strength with the matrix, which is conducive to increasing the load. Transfer efficiency, but generally commercially prepared graphene has a small aspect ratio, resulting in graphene-reinforced metal matrix composites with high strength but poor plasticity

Method used

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  • A preparation method of hydrogen-etched carbon nanotube-reinforced copper-based composite material
  • A preparation method of hydrogen-etched carbon nanotube-reinforced copper-based composite material

Examples

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Embodiment 1

[0022] A method for preparing a hydrogen-etched carbon nanotube reinforced copper-based composite material, specifically comprising the following steps:

[0023] (1) Acidification treatment of carbon nanotubes: place 1 g of single-walled carbon nanotubes with a diameter of 50 nm in an acid solution for ultrasonic dispersion treatment for 120 minutes, heat to a temperature of 70 ° C and treat at a constant temperature for 8 hours, and obtain after filtration, washing and drying The carbon nanotubes are pretreated, 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 is 3:1.

[0024] (2) Ball milling treatment of pure copper powder: 35g of pure copper powder (particle size: 2μm) and a certain number of balls are placed in a ball mill tank, a small amount of ethanol is added as a process control agent, the ball-to-material ratio is 10:1, and...

Embodiment 2

[0029] A method for preparing a hydrogen-etched carbon nanotube reinforced copper-based composite material, specifically comprising the following steps:

[0030] (1) Acidification treatment of carbon nanotubes: place 1 g of double-walled carbon nanotubes with a diameter of 60 nm in an acid solution for ultrasonic dispersion treatment for 70 minutes, heat to a temperature of 50 ° C and treat at a constant temperature for 15 hours, and obtain after filtration, washing and drying The carbon nanotubes are pretreated, 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 is 3:1.

[0031] (2) Ball milling treatment of pure copper powder: 35g of pure copper powder (particle size 4μm) and a certain number of balls are placed in a ball mill tank, a small amount of ethanol is added as a process control agent, the ball-to-material ratio is 5:1, and t...

Embodiment 3

[0036] A method for preparing a hydrogen-etched carbon nanotube reinforced copper-based composite material, specifically comprising the following steps:

[0037](1) Acidification treatment of carbon nanotubes: place 1 g of multi-walled carbon nanotubes with a diameter of 80 nm in an acid solution for ultrasonic dispersion treatment for 20 minutes, heat to a temperature of 80 ° C and treat at a constant temperature for 6 hours, and obtain after filtration, washing and drying The carbon nanotubes are pretreated, 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 is 4:1.

[0038] (2) Ball milling of pure copper powder: put 35g of pure copper powder (particle size 4μm) together with a certain number of balls in a ball mill tank, add a small amount of ethanol as a process control agent, the ball-to-material ratio is 6:1, and the ball mill T...

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Abstract

The invention discloses a method for preparing a hydrogen-etched carbon nanotube reinforced copper-based composite material, which belongs to the field of composite material preparation. According to the method of the present invention, the carbon nanotubes are acidified first, and secondly, the pure copper powder is ball-milled into flakes, and the prepared acidified carbon nanotubes and flake copper powders are mixed and ball-milled to prepare composite powders, and then the composite powders are The powder is put into a tube furnace and fed with hydrogen gas to obtain a composite powder of carbon nanotubes and copper powder etched by hydrogen gas, and finally, the obtained composite powder is prepared into a bulk material by a spark plasma sintering process. Under the catalysis of copper, the present invention etches carbon nanotubes with hydrogen to obtain a mixed structure with characteristics of both carbon nanotubes and graphene, and uses it as a reinforcement to prepare a copper-based composite material, which can effectively increase carbon The contact area between the nano-reinforcement and the copper matrix improves the load transfer efficiency and obtains a copper-based composite material with good comprehensive mechanical properties.

Description

technical field [0001] The invention relates to a method for preparing a hydrogen-etched carbon nanotube-reinforced copper-based composite material, which belongs to the technical field of composite material preparation. Background technique [0002] Carbon nanotubes (CNTs) is a typical one-dimensional carbon nanomaterial with a large aspect ratio. It has a unique structure and excellent mechanical properties. Its tensile strength can reach 50-200GPa, which is 100 times that of steel. The density is only 1 / 6 of that of steel, and its elastic modulus can reach 1TPa, which is equivalent to that of diamond and about 5 times that of steel. At the same time, carbon nanotubes have excellent electrical and thermal conductivity, low thermal expansion coefficient, and can be used as ideal reinforcements for metal matrix composites. However, due to the poor wettability between carbon nanotubes and the metal matrix, there are problems such as easy agglomeration of carbon nanotubes and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C1/10C22C9/00B22F1/00
CPCC22C1/05C22C9/00C22C26/00C22C2026/002B22F1/14
Inventor 陶静梅彭健易健宏鲍瑞刘意春李凤仙李才巨游昕谈松林
Owner KUNMING UNIV OF SCI & TECH
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