A kind of method for preparing graphene powder
A graphene powder and powder technology, applied in graphene, chemical instruments and methods, nano-carbon, etc., can solve the problems of difficulty in batch production, environmental pollution, low purity of graphene powder, etc., to reduce difficulty and reduce production cost effect
Active Publication Date: 2019-07-19
GUANGDONG SUQUN NEW MATERIAL CO LTD
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Problems solved by technology
The redox graphite method has a simple and diversified process, and is a commonly used method for preparing graphene. However, this method is only suitable for a small amount of preparation in the laboratory for research, and a large amount of preparation is easy to produce a large amount of waste acid and waste water. etc. will cause environmental pollution
Vapor deposition method is difficult to carry out large-scale preparation, which brings difficulties to mass production
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[0020] In order to further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0021] as attached figure 1 Shown, the present invention discloses a kind of method for preparing graphene powder, comprises the following steps:
[0022] S1, select a PI film as a raw material, and carbonize and sinter the PI film to obtain a glassy PI film. After carbonization and sintering, the impurities and tar in the PI film are removed to improve its purity.
[0023] S2, after cooling, the glassy PI film is ground into an initial powder, and the particle size of the powder particles in the initial powder is 2 nm to 10 μm. By carbonizing and sintering the PI film, it is sintered into a glassy state. Then the glassy PI film is ground into powder by mechanical equipment.
[0024] S3, filtering ...
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Abstract
The invention discloses a method used for preparing graphene powder. The method comprises following steps: a raw material PI film is selected, and the PI film is subjected to carbonization sintering so as to obtain PI film at glassy state; cooling is carried out, and after cooling, the PI film at glassy state is grinded into an initial powder material, wherein the particle size of the initial powder material is controlled to be 2nm to 10<mu>m; the initial powder material is subjected to filter screening so as to obtain a separated powder material with a powder particle size of 2nm to 15nm; and the separated powder material is subjected to graphitization sintering, and cooling is carried out after graphitization sintering so as to obtain finished product graphene powder, wherein the powder particle size of the finished product graphene powder is smaller than 10nm. Artificially synthesized graphene powder is obtained via the method; preparation cost is relatively low; technology is simple; operation is convenient; and the method is suitable for large-batch production.
Description
technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a method for preparing graphene powder. Background technique [0002] Since the discovery of graphene in 2004, many scientists have devoted themselves to the research of graphene preparation methods, especially the method of preparing graphene with high quality, high yield, low cost and stable structure. At present, the methods for preparing graphene mainly include the following methods: exfoliation method, including micromechanical exfoliation method and solvent exfoliation method; Methods, including the commonly used Hummers method, Standenmaier method, Brodie method, etc.; in addition, there are arc discharge method, graphite interlayer chemical pathway method, carbon nanotube peeling method, etc. The redox graphite method has a simple and diversified process, and is a commonly used method for preparing graphene. However, this method is only suitable for a sm...
Claims
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IPC IPC(8): C01B32/184
CPCC01B2204/32
Inventor 任泽明廖骁飞王号
Owner GUANGDONG SUQUN NEW MATERIAL CO LTD