Preparation method of carbon nanotube film

Abstract

The invention provides a method for preparing a carbon nanotube film, comprising the following steps: providing a carbon nanotube array transferred to the surface of an elastic substituting substrate, the surface of the carbon nanotube array close to the elastic substituting substrate is the second surface, and the surface away from the elastic substituting substrate is Elasticity replaces the surface of the substrate as the first surface, and the morphology of the carbon nanotube array can enable a carbon nanotube film to be continuously pulled out from the carbon nanotube array, the carbon nanotube film comprising a plurality of carbon nanotubes connected end to end Tube; at least one etching groove is formed on the first surface of the carbon nanotube array, and the length direction of the etching groove is the second direction; stretch the elasticity instead of the substrate along the first direction perpendicular to the second direction, thereby increasing increasing the length of the carbon nanotube array on the elastic substituted substrate in the first direction; and pulling the carbon nanotube film from the carbon nanotube array on the elastic substituted substrate along the second direction.

Description

technical field [0001] The invention relates to a method for preparing a carbon nanotube film, in particular to a method for preparing a carbon nanotube film obtained by pulling from a carbon nanotube array. Background technique [0002] Carbon nanotubes are hollow tubular objects rolled from graphene sheets, which have excellent mechanical, thermal and electrical properties, so they have broad application fields. Because the size of a single carbon nanotube is nanoscale, it is difficult to use it. People try to use multiple carbon nanotubes as raw materials to make a macroscopic carbon nanotube film with a larger size. For example, a macroscopic film-like structure formed by a plurality of carbon nanotubes, such as a carbon nanotube film. The Chinese invention patent with the notification number CN101458975B discloses a carbon nanotube film obtained directly from a carbon nanotube array. This carbon nanotube film has good transparency, has a macroscopic scale and is self-s...

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Problems solved by technology

However, the carbon nanotube film pulled from the carbon nanotube array is an ultra-thin film formed only by the overlapping of carbon nanotubes through the mutual attraction of van der Waals force. When the carbon nanotube film is stretched, a little Inadvertently, it will cause the rupture of the carbon nanotube film, so this method is difficult for large-scale practical application

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