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Preparation method of carbon nanotube reinforced foamed aluminum matrix composite

An aluminum-based composite material and carbon nanotube technology, which is applied in the field of foamed aluminum-based composite materials, can solve the problems of carbon nanotube structure damage, difficult preparation process, large energy consumption, etc., and achieves improved interface bonding, simple equipment process, improved The effect of the degree of dispersion

Active Publication Date: 2017-08-04
THE HONG KONG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method for preparing carbon nanotube-reinforced foamed aluminum-based composite materials, which can solve the problem that the existing technology will damage the structure of carbon nanotubes, the preparation process is difficult to control, and the energy consumption is large. question

Method used

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  • Preparation method of carbon nanotube reinforced foamed aluminum matrix composite
  • Preparation method of carbon nanotube reinforced foamed aluminum matrix composite
  • Preparation method of carbon nanotube reinforced foamed aluminum matrix composite

Examples

Experimental program
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Embodiment 1

[0038] (1) Pretreatment of carbon nanotubes

[0039] Multi-walled carbon nanotubes (tube wall outer diameter 8-15nm, average length 50μm, purchased from Nanjing Xianfeng Nano Material Technology Co., Ltd., China) were immersed in sulfuric acid (concentration 98%) and nitric acid (concentration 68%) in a mixed acid, heated to 60°C for 5 hours, rinsed and filtered with deionized water repeatedly after cooling until the pH value was close to 7, and then dried in a vacuum oven at 80°C for 24 hours to obtain acidified carbon nanotube.

[0040] (2) Electroless copper plating on the surface of carbon nanotubes

[0041]50 mg of acidified carbon nanotubes were added into 150 ml of deionized water, and ultrasonically dispersed for 30 minutes. Dissolve 4.5 g of tin chloride dihydrate into 6 ml of 38% hydrochloric acid, and then use deionized water to bring the total volume up to 50 ml to prepare a tin chloride sensitizing solution. 0.3 g of palladium chloride was dissolved in 38% hydr...

Embodiment 2

[0046] The specific method and steps are the same as in Example 1, but the different conditions are: the amount of copper-plated carbon nanotubes in step (3) is increased to 0.112g, and finally the content of copper-plated carbon nanotubes obtained is 10vol%, and the porosity is about 60% aluminum foam composite.

Embodiment 3

[0048] The specific method and steps are the same as in Example 1, but the different conditions are: the amount of copper-plated carbon nanotubes in step (3) increases to 0.166g, and finally the content of copper-plated carbon nanotubes obtained is 15vol%, and the porosity is about 60% aluminum foam composite.

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Abstract

The invention discloses a preparation method of a carbon nanotube reinforced foamed aluminum matrix composite. The method comprises the following steps: pretreating a carbon nanotube through mixed acid; chemically plating copper on the carbon nanotube so as to warp the surface of the carbon nanotube with a metallic copper layer; then uniformly mixing the carbon nanotube with the metal copper plating layer, aluminum powder and urea particles, performing cold press forming on the mixture, and drying after soaking in warm water; and finally adopting a microwave sintering technology without atmosphere protection through powder metallurgy for a few minutes to obtain the carbon nanotube reinforced foamed aluminum matrix composite. The method has the advantages that the interface bonding strength of the carbon nanotube and a base body can be improved; the dispersing performance of the carbon nanotube is improved, and the damage to the structure is reduced; the bore diameter and the porosity of the foamed aluminum matrix composite can be effectively controlled; and the microwave sintering technology is combined, so that the carbon nanotube reinforced foamed aluminum matrix composite with outstanding performances can be quickly prepared in an energy-saving manner.

Description

technical field [0001] The invention relates to the technical field of foamed aluminum-based composite materials, in particular to a method for preparing a carbon nanotube-reinforced foamed aluminum-based composite material with carbon nanotubes as a reinforcing phase. Background technique [0002] Aluminum foam matrix composite is a new type of porous material composed of metal aluminum as the matrix and pores. This material has the advantages of light weight, large specific surface area, high specific mechanical strength, good vibration and sound insulation, good heat dissipation, high electromagnetic shielding performance, etc., and has dual properties of structure and function. It has been widely used in aerospace, construction, machinery, etc. , national defense, transportation and other fields. In order to improve the comprehensive performance of aluminum foam, different particle or fiber reinforcement phases are added to aluminum foam to obtain aluminum foam matrix c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C21/00
CPCC22C1/08C22C21/00
Inventor 邓泽贤陈玲陈镜昌余大民罗永祥
Owner THE HONG KONG POLYTECHNIC UNIV