Carbon nanotube compound film and preparation method thereof

Abstract

The invention relates to a carbon nanotube composite film, which comprises at least one carbon nanotube layer and at least one matrix material layer. The invention also relates to a preparation method for the carbon nanotube composite film, which comprises the following steps: providing a carbon nanotube array formed on a substrate; covering the matrix material layer on the carbon nanotube array to obtain the carbon nanotube array covered with the matrix material layer; and extruding the carbon nanotube array covered with the matrix material layer to obtain the carbon nanotube composite film. The process of extruding the carbon nanotube array covered with the matrix material layer is carried out by a pressure device, so the preparation method is simple. The preparation method can control the carbon nanotubes in the carbon nanotube composite film to be arranged in the same polarity in various directions or along a fixed direction or different directions. Moreover, the carbon nanotubes in the carbon nanotube composite film prepared are distributed uniformly, so that the carbon nanotube composite film has better mechanical strength and roughness.

Description

technical field [0001] The invention relates to a composite film and a preparation method thereof, in particular to a carbon nanotube composite film and a preparation method thereof. Background technique [0002] Since the Japanese scientist Iijima first discovered carbon nanotubes (Carbon Nanotubes, CNTs) in 1991, nanomaterials represented by carbon nanotubes have attracted great attention for their unique structures and properties. In recent years, with the continuous deepening of research on carbon nanotubes and nanomaterials, their broad application prospects continue to emerge. For example, due to the unique electromagnetic, optical, mechanical, and chemical properties of carbon nanotubes, a large number of applications in the fields of field emission electron sources, sensors, new optical materials, and soft ferromagnetic materials have been continuously reported. [0003] In particular, the combination of carbon nanotubes and other materials such as metals, semicondu...

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Problems solved by technology

[0005]However, the preparation method of the existing carbon nanotube composite film is relatively complicated, and the prepared carbon nanotube composite film is generally a single-layer structure, and the carbon nanotube The tubes are randomly distributed in all directions in the carbon nanotube composite film

In this way, the carbon nanotubes are unevenly dispersed in the carbon nanotube composite film, resulting in poor mechanical strength and toughness of the obtained carbon nanotube composite film, which is easy to break, and affects the thermal and electrical properties of the carbon nanotube composite film.

A carbon nanotube composite film prepared by chemically modifying carbon nanotubes (see, Surface resistance and rheological behaviors of carboxylated multiwall carbon nanotube-filled PET composite film, Dae HoShin, Journal of Applied Polymer Science, V 99n3, p900- 904(2006)), although the electrical properties have been improved, but due to the heating conditions, the types of materials composited with carbon nanotubes are limited

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