Carbon nano-tube film composite material preparation method

Abstract

The present invention discloses a carbon nano-tube film composite material preparation method, which comprises: preparing a substrate; preparing a carbon nano-tube film; etching the carbon nano-tube film; placing the etched carbon nano-tube film on at least a surface of the substrate to form a carbon nano-tube structure so as to form a carbon nano-tube film composite material preform; and heating the carbon nano-tube film composite material preform to make the carbon nano-tube film structure and the substrate be compounded so as to obtain the carbon nano-tube film composite material. Compared with the method in the prior art, the method of the present invention has the following characteristics that: the carbon nano-tube film is etched before the carbon nano-tube film and the substrate are compounded to obtain the carbon nano-tube film with the partial thinned area or penetrating carbon nano-tube film so as to improve the interface performance of the carbon nano-tube composite material and reduce the interface defects, the obtained carbon nano-tube film composite material exhibits the excellent comprehensive performance and shows the application potential in a plurality of future fields.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a preparation method of a carbon nanotube film composite material. Background technique [0002] Carbon nanotube film is a macroscopic thin film material with a thickness ranging from a single atomic molecule to a micron millimeter scale formed by a large number of carbon nanotubes intertwined and connected. It is an important part of the research field of carbon nanotubes. Carbon nanotube films have the characteristics of high strength, high conductivity, light and thin, excellent flexibility and chemical stability, and have made some progress in the application research in the fields of electronic power, energy storage, intelligent sensing, composite materials, aerospace and other fields. On the other hand, in view of the current continuous improvement of material performance requirements, it is necessary to endow and combine two or more advantages in a ...

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Problems solved by technology

[0003] The carbon nanotube film composite material prepared by the above method usually has the following disadvantages: in the process of compounding the carbon nanotube film with the polymer matrix, due to the high degree of densification of the carbon nanotube film, the chain segment of the polymer matrix is ​​relatively long, high The molecular matrix cannot be well infiltrated into the internal structure of the carbon nanotube film, resulting in increased defects in the composite material (voids and bubbles, interlayer separation, etc.)

The method of modifying the surface of carbon nanotubes in the prior art usually adopts the method of dispersing carbon nanotubes in strong oxidizing acids such as sulfuric acid and nitric acid or surfactants. This method can solve the problem of carbon nanotube agglomeration to a certain extent. However, due to the strong acid treatment, the structure of the carbon nanotubes will be damaged to a certain extent, and the use of surfactants will make the surfactants difficult to remove in the final carbon nanotube composites, and the carbon nanotubes will also be separated. Without forming an integral carbon nanotube structure, the mechanical strength and toughness of the carbon nanotube composite material are poor, and the good electrical and thermal conductivity of the carbon nanotube cannot be fully utilized.

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