Carbon nano-tube composite material and preparation method thereof

Abstract

The present invention relates to a composite material of carbon nanotubes and the manufacture method. The composite material of carbon nanotubes comprises a matrix and a plurality of carbon nanotubesdistributed in the matrix. The carbon nanotubes are arranged along the same direction parallel to the matrix surface in the matrix and the ends of the upward adjacent carbon nanotubes along the arranging direction are close to or contact each other. The manufacture method of the carbon nanotubes contains the following steps: (1) a stripped activator is made at an underlay surface. (2) The carbon nanotubes arranged directionally grows in the activator. (3) The carbon nanotubes are immersed into the matrix material, to which a firming agent is added. (4) When the matrix material is not solidified completely, the carbon nanotubes are pressed down by a tool, which makes the carbon nanotubes to be arranged transversely along the same direction in the matrix. (5) When matrix material is solidified completely, the composite is peeled off from the underlay to form the composite material of carbon nanotubes.

Description

technical field [0001] The invention relates to a carbon nanotube composite material and a manufacturing method thereof, in particular to a carbon nanotube composite material with directional electrical and thermal conductivity and a manufacturing method thereof. Background technique [0002] Since the invention of carbon nanotubes (CNTs) by Iijima of NEC Corporation in Japan in 1991 (Iijima S., Nature, 1991, 354, 56-58), carbon nanotubes have attracted great attention from the scientific and industrial circles and become the Hot spots of international scientific research in recent years. Carbon nanotubes have many excellent properties, and the composite of carbon nanotubes and polymers can complement or strengthen the advantages of materials. Therefore, the use of carbon nanotubes as filling materials and composite engineering materials has become one of the important research directions of carbon nanotubes. In particular, carbon nanotubes have excellent thermal conductiv...

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Problems solved by technology

However, the carbon nanotube composites are increasingly unable to meet the diverse application requirements

First of all, to make the carbon nanotube composite film have good electrical and thermal conductivity, the thickness of the composite film is required to be less than or equal to the length of the carbon nanotube, so the composite film can only be a few hundred microns thick; moreover , the previous carbon nanotube composite film can only conduct electricity and heat conduction longitudinally along the growth direction of carbon nanotubes, but does not have transverse conductivity and heat conductivity perpendicular to the growth direction of carbon nanotubes, and the conduction length is limited by the length of carbon nanotubes

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