Preparation method of metal matrix composite for carbon nano tube

A carbon nanotube and composite material technology, applied in the field of composite material technology preparation, can solve the problems of poor affinity, inability to eliminate the difference in the surface properties of carbon nanotubes and metal powders, uneven dispersion of carbon nanotubes, etc. The effect of harmony and simple craftsmanship

Active Publication Date: 2010-09-01
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The limitation of this method is that although the use of polyvinyl alcohol as a dispersant is helpful for the uniform dispersion of carbon nanotubes in aqueous solution, it cannot eliminate the property difference between carbon nanotubes and the surface o

Method used

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  • Preparation method of metal matrix composite for carbon nano tube
  • Preparation method of metal matrix composite for carbon nano tube
  • Preparation method of metal matrix composite for carbon nano tube

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Add carbon nanotubes, an appropriate amount of surfactant SDS, and defoamer octanol into deionized water, and ultrasonically disperse them for 2 hours to disperse the carbon nanotubes evenly, then add deionized water to adjust the concentration of carbon nanotubes to obtain 0.02wt% carbon nanotubes. tube aqueous solution;

[0038]Under the condition of heating in a constant temperature water bath at 90°C, dissolve polyvinyl alcohol in deionized water, mechanically stir until it is completely dissolved, add deionized water after cooling to room temperature to adjust the concentration of polyvinyl alcohol, and obtain a 0.2 wt% aqueous solution of polyvinyl alcohol;

[0039] Take 10g of aluminum powder, add it to 50ml of 0.2wt% polyvinyl alcohol aqueous solution, stir it magnetically for 1 hour, then wash and filter it with deionized water several times to obtain aluminum powder coated with polyvinyl alcohol on the surface;

[0040] Add the above polyvinyl alcohol-coated a...

Embodiment 2

[0043] Add carbon nanotubes, an appropriate amount of surfactant SDS, and defoamer octanol to absolute ethanol, and ultrasonically disperse them for 2 hours to uniformly disperse the carbon nanotubes, and then add absolute ethanol to adjust the concentration of carbon nanotubes to obtain 0.2wt% carbon nanotubes. Nanotube ethanol solution;

[0044] Under the condition of heating in a constant temperature water bath at 90°C, dissolve polyvinyl alcohol in deionized water, stir it mechanically until it is completely dissolved, add deionized water after cooling to room temperature to adjust the concentration of polyvinyl alcohol, and obtain a 2wt% aqueous solution of polyvinyl alcohol;

[0045] Take 10g of aluminum powder, add it to 50ml of 2wt% polyvinyl alcohol aqueous solution, stir it magnetically for 1 hour, then wash and filter it with deionized water several times to obtain aluminum powder coated with polyvinyl alcohol on the surface;

[0046] Add the above polyvinyl alcohol...

Embodiment 3

[0049] Adding carbon nanotubes and an appropriate amount of surfactant SDBS to absolute ethanol, ultrasonically dispersing for 2 hours to disperse the carbon nanotubes evenly, and then adding absolute ethanol to adjust the concentration of carbon nanotubes to obtain a 1wt% ethanol solution of carbon nanotubes;

[0050] Dissolving polyvinylpyrrolidone in absolute ethanol, mechanically stirring until completely dissolved, cooling to room temperature, adding absolute ethanol to adjust the concentration of polyvinylpyrrolidone to obtain a 5 wt% polyvinylpyrrolidone ethanol solution;

[0051] Take 10g of copper powder, add it to 50ml of 5wt% polyvinylpyrrolidone ethanol solution, stir it magnetically for 0.5 hours, then wash and filter it with absolute ethanol several times to obtain copper powder coated with polyvinylpyrrolidone;

[0052] Add the above polyvinylpyrrolidone-coated copper powder to 50ml of 1wt% carbon nanotube ethanol solution, and magnetically stir until the ethanol...

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Abstract

The invention provides a preparation method of a metal matrix composite for a carbon nano tube, belonging to the composite material technical field. The method comprises the following steps: firstly adding metal powder to polymer solution for surface coating, and then adding the polymer-coating metal powder to carbon nano tube solution so that the polymer-coating metal powder surface uniformly absorbs the carbon nano tube from the carbon nano tube solution to obtain uniformly dispersed metal composite powder for the carbon nano tube; and then preparing the obtained composite powder into the compact metal matrix composite for the carbon nano tube by a powder metallurgical process. In the invention, uniform dispersion of the carbon nano tube can be achieved by surface modification of the metal powder, thus less damage is caused on the carbon nano tube, excellent properties can be retained, and the mass fraction of the carbon nano tube in the composite material can be adjusted and controlled within the range of 0.1%-10%. In addition, the preparation method has simple process, high efficiency, environmental protection and large-scale application potential.

Description

technical field [0001] The invention relates to a preparation method in the technical field of composite materials, in particular to a preparation method of a carbon nanotube metal matrix composite material. Background technique [0002] Carbon nanotube-reinforced metal matrix composites have unique physical and chemical properties due to the characteristics of both metals and carbon nanotubes. They have broad application prospects in aerospace vehicles, precision machinery, and medical devices. More and more materials scientists pay attention. However, due to the strong van der Waals force between carbon nanotubes, agglomeration or entanglement, and the significant difference in surface properties between carbon nanotubes and metals, it is difficult for carbon nanotubes to disperse uniformly in the metal matrix. The performance of carbon nanotube metal matrix composites prepared by traditional processes such as powder metallurgy, stirred casting, and melt infiltration is f...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C1/05B22F3/02C01B31/02
Inventor 李志强许勇江林张荻
Owner SHANGHAI JIAO TONG UNIV
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