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Graphene oxide based method for preparing highly oriented pyrolytic graphite film

A technology for pyrolytic graphite and graphene, which is applied in the field of high-directional pyrolytic graphite material preparation, can solve the problems of harsh conditions, complex preparation process, and high price, and achieves the effects of controllable thickness, simple process steps, and good thermal conductivity.

Inactive Publication Date: 2016-05-04
WUXI HUICHENG GRAPHITE ALKENE TECH APPL CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

Using an organic polymer film with a high degree of orientation, HOPG with a very smooth surface and excellent thermal and electrical conductivity can be obtained by pressure carbonization and graphitization in an inert atmosphere, but due to the carbonization and graphitization of organic polymers The process pyrolysis reaction mechanism is very complicated, so the preparation process is complicated and the conditions are harsh, which largely limits the mass production of HOPG, and polyimide (PI), polyoxadiazole (POD), polystyrene (PPV) and other organic polymer films with a high degree of orientation are relatively expensive, which largely limits the development of the application of HOPG.

Method used

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  • Graphene oxide based method for preparing highly oriented pyrolytic graphite film

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Embodiment 1

[0038] A method for preparing a highly oriented pyrolytic graphite film based on graphene oxide, comprising the steps of:

[0039] 1) adding graphene oxide powder into water, and ultrasonically dispersing to obtain graphene oxide aqueous solution;

[0040] 2) Add polyvinyl alcohol and 13 C isotope synthesis of graphite, fully mixed evenly, to obtain a mixed solution of graphene oxide;

[0041] 3) uniformly coating the graphene oxide mixed solution on the substrate, pre-drying and solidifying, rolling evenly, and then drying to obtain a graphene film;

[0042] 4) Put the graphene film in the graphite furnace, carry out graphitization treatment under the protection of an inert gas, and cool naturally after completion to obtain a highly oriented pyrolytic graphite film.

[0043] Wherein, the graphene oxide in the graphene oxide mixed solution is 10wt%, polyvinyl alcohol is 89wt%, and 13C isotopically synthesized graphite is 1wt%.

[0044] Wherein, the method further includes c...

Embodiment 2

[0052]Different from Example 1, the graphene oxide in the graphene oxide mixed solution is 50wt%, polyvinyl alcohol is 40wt%, 13 C isotope synthetic graphite is 10wt%; the thickness of the highly oriented pyrolytic graphite film is 50 μm.

Embodiment 3

[0054] Different from Example 1, the graphene oxide in the graphene oxide mixed solution is 30wt%, polyvinyl alcohol is 65wt%, 13 C isotope synthetic graphite is 5 wt%; the thickness of the highly oriented pyrolytic graphite film is 50 μm.

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Abstract

The present invention discloses a graphene oxide based method for preparing highly oriented pyrolytic graphite film. The method comprises the steps of: 1) adding a graphene oxide powder to water, and conducting ultrasonic dispersion to obtain an aqueous solution of graphene oxide; 2) adding conductive polymer and high purity graphite in the aqueous solution of graphene oxide, mixing thoroughly to obtain a mixed solution of graphene oxide; 3) uniformly coating the mixed solution of graphene oxide on a substrate, pre-drying, curing, uniformly rolling, and drying to obtain a graphene film; and 4) placing the graphene film in a graphite furnace, graphitizing under protection of inert gas, and naturally cooling to obtain the highly oriented pyrolytic graphite film. Compared with a conventional preparation method of highly oriented pyrolytic graphite film by using an organic polymer film with high degree of orientation, the method of the invention omits the carbonization process, and has simple process and low production cost; and the obtained highly oriented pyrolytic graphite film has controllable shape and thickness and good heat conduction function.

Description

technical field [0001] The invention relates to the technical field of preparation of highly oriented pyrolytic graphite materials, in particular to a method for preparing highly oriented pyrolytic graphite based on graphene oxide. Background technique [0002] Highly oriented pyrolytic graphite (HOPG) is a new type of high-purity carbon material with a very smooth surface and excellent thermal and electrical conductivity. It is an indispensable material in the development of modern science and technology. It is widely used in fields including X-ray monochromator, neutron filter and monochromator, basic performance research of graphite, large-scale graphite interlayer compound, high thermal conductivity application, etc. [0003] In 1963, the United Kingdom first produced HOPG by pressure heat treatment process. In 1964, Union Carbide Corporation of the United States expanded this process to produce HOPG. However, due to its harsh preparation process, the materials are very ...

Claims

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Application Information

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IPC IPC(8): C04B35/52C04B35/622
CPCC04B35/522C04B35/62218C04B2235/6562C04B2235/6567C04B2235/658
Inventor 李璐屈晓兰
Owner WUXI HUICHENG GRAPHITE ALKENE TECH APPL CO LTD
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