Graphene oxide based method for preparing highly oriented pyrolytic graphite film
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
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
View PDF5 Cites 14 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
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 ver...
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
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.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Property
Measurement
Unit
Thickness
aaaaa
aaaaa
Thickness
aaaaa
aaaaa
Thickness
aaaaa
aaaaa
Login to view more
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
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more