Preparation method of graphene film

A graphene film, graphene technology, applied in the direction of graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of poor composite quality, mechanical properties of composite films, influence of electrical conductivity, limited contact area, etc., to achieve bonding force Increase, improve mechanical strength and electrical and thermal conductivity, the effect of good strength

Inactive Publication Date: 2019-10-08
上海欣材科技有限公司
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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

Method used

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  • Preparation method of graphene film

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[0014] Example 1

[0015] A method for preparing graphene film, which is carried out according to the following steps:

[0016] (1) Preparation of hydroxylated multi-walled carbon nanotubes: Add multi-walled carbon nanotubes to a mixed solution of concentrated nitric acid and concentrated sulfuric acid. The volume ratio of concentrated nitric acid and concentrated sulfuric acid added in the mixed solution is 1:2, 60 Ultrasound at ℃ for 6h, then add deionized water to wash to pH=7, add ethylene glycol solution and potassium hydroxide solution dropwise successively, ultrasonically shake for 8h, wash and filter to pH=7, and dry to obtain surface hydroxylated multi-walled carbon Nanotubes; where the mass of multi-walled carbon nanotubes, the volume of ethylene glycol solution and the volume ratio of potassium hydroxide solution are 1g:45ml:5ml;

[0017] (2) Surface modification of graphene: Disperse graphene oxide in DMF ultrasonically, then add NaOH and succinic acid peroxide to contin...

Example Embodiment

[0020] Example 2

[0021] A method for preparing graphene film, which is carried out according to the following steps:

[0022] (1) Preparation of hydroxylated multi-walled carbon nanotubes: Add multi-walled carbon nanotubes to a mixed solution of concentrated nitric acid and concentrated sulfuric acid. The volume ratio of concentrated nitric acid and concentrated sulfuric acid to the mixed solution is 1:3, 50℃ Under ultrasonic for 8h, then add deionized water to wash to pH=7, add ethylene glycol solution and potassium hydroxide solution dropwise in turn, ultrasonically shake for 5-12h, wash and filter to pH=7, and dry to obtain surface hydroxylated multi-wall Carbon nanotubes; where the mass of multi-walled carbon nanotubes, the volume of ethylene glycol solution and the volume ratio of potassium hydroxide solution are 1g:50ml:3ml;

[0023] (2) Surface modification of graphene: Disperse graphene oxide in DMF ultrasonically, then add NaOH and succinic acid peroxide to continue ultra...

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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...

Claims

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Application Information

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IPC IPC(8): C01B32/194C01B32/168
CPCC01B32/168C01B32/194C01B2204/22C01B2204/24C01B2204/26
Inventor 不公告发明人
Owner 上海欣材科技有限公司
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