Carbon nano-tube composite material and preparation method thereof

Abstract

A CNT composite (10) includes a matrix (14) and a number of CNTs (12) embedded in the matrix. The matrix has a surface (102) and an opposite surface (104). Head portions of the respective CNTs are consistently oriented, parallel to the surfaces of the matrix. A method for manufacturing the composite includes (a) providing a substrate and depositing a catalyst film on the substrate; (b) forming the array of CNTs via the catalyst film on the substrate; (c) immersing the CNTs in a liquid matrix material, infusing the liquid matrix material into the array of CNTs; (d) taking the carbon nanotubes with the infused matrix out of the liquid matrix; (e) pressing the still-soft matrix and the CNTs therein, in order to arrange the CNTs consistently and parallel to the surfaces of the matrix; and (f) solidifying and peeling away the matrix to produce the CNT composite.

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 conductivity and thermal conductivity and a manufacturing method thereof. Background technique [0002] Since Iijima of NEC Corporation of Japan invented Carbon NanoTube (CNT) 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 spot of international scientific research in recent years. Carbon nanotubes have many excellent characteristics, and the combination of carbon nanotubes and polymers can complement or enhance the advantages of materials. Therefore, the use of carbon nanotubes as a filler material and the composite of engineering materials have become one of the important research directions of carbon nanotubes. In particular, carbon nanotubes have excellent thermal condu...

AI Technical Summary

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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