Preparation method of graphene film

Abstract

The invention discloses a preparation method of a graphene film. The preparation method includes: preparing hydroxylated multiwalled carbon nanotubes, performing graphene surface modification, preparing a carbon nanotube-graphene compound solution, and preparing the graphene film in a spraying manner. The preparation method has the advantages that the carbon nanotubes and the graphene are integrated, and due to the fact that the graphene and the carbon nanotubes can have a synergistic effect, the mechanical strength, electric conductivity and thermal conductivity of the graphene film can be increased; by the hydroxylation of the multiwalled carbon nanotubes and the surface carboxylation of the graphene, binding force between the carbon nanotubes and the graphene is increased greatly by thereaction force between hydroxyl and carboxyl, and accordingly the graphene film is good in strength, toughness and electric conductivity.

Description

technical field [0001] The invention relates to a preparation method of a graphene film. Background technique [0002] Graphene is a heteromorphic body in which a single layer of carbon atoms is arranged into a hexagonal lattice, with carbon atoms sp 2 The hybrid orbitals are arranged in a honeycomb crystal, only one carbon atom thick, and it is the basic structural element of many other isoforms of carbon, such as graphite, diamond, carbon, carbon nanotubes, and fullerenes; the unique two-dimensional structure of graphene It has excellent properties such as electrical conductivity, thermal conductivity, electron mobility, and mechanical strength. Since its discovery, research on graphene as a new core material such as semiconductor devices, transistors, high-sensitivity sensors, and energy storage electrode materials All have large-scale research and relatively good research results; the current methods for preparing graphene films mainly include physical methods and chemi...

AI Technical Summary

Problems solved by technology

At present, the research on graphene and carbon nanotube composite materials has gradually emerged, the purpose of which is to give full play to the respective advantages of graphene and carbon nanotubes and maximize the performance of both; Simple contact, limited contact area, and poor composite quality lead to a great impact on the mechanical properties and electrical conductivity of the composite film

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