Preparation method of high thermal conductivity natural flexible graphite film

A flexible graphite, high thermal conductivity technology, applied in the direction of chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of corrosion and residue of contact parts, and achieve the effect of poor high temperature oxidation resistance and low tensile strength

Inactive Publication Date: 2014-01-29
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
View PDF1 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the preparation of the material, concentrated H 2 SO 4 As an intercalation agent, resulting in S residue in the final product, it is easy to cause corrosion of contact parts in application

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
  • Preparation method of high thermal conductivity natural flexible graphite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] HClO 4 : HNO 3 : The natural flake graphite is mixed according to the weight ratio of 65:5:30. During the mixing process, the HClO 4 Pour into HNO 3 In a container, then the natural flake graphite is added in the above-mentioned mixed acid and stirred for 1.5min. The above natural flake graphite has an average particle size of 32 meshes, a carbon content of 99.95wt.%, the concentration of nitric acid used is 65wt.%, and the concentration of perchloric acid is 70wt.%. The stirred mixture was heated to 60° C. and reacted at this temperature for 10 min to obtain a perchloric acid / graphite intercalation compound. The resulting perchloric acid / graphite intercalation compound was then washed with deionized water to a pH of 5.8. Put the laundry into a drying oven, heat it to 80°C for drying treatment, and the drying time is 4 hours. After drying, take it out of the furnace and cool it down to room temperature naturally, then put the dried material into a high-temperature...

Embodiment 2

[0019] HClO 4 、HNO 3 It is mixed with natural flake graphite according to the weight ratio of 62.5:3.5:34. During the mixing process, the HClO 4 Pour into HNO 3 In the container, then join natural flake graphite in the above-mentioned mixed acid and stir 2min. The above natural flake graphite has an average particle size of 40 meshes, a carbon content of 99.98wt.%, the concentration of nitric acid used is 66wt.%, and the concentration of perchloric acid is 71wt.%. The stirred mixture was heated to 50° C., and reacted at this temperature for 20 min to obtain a perchloric acid / graphite intercalation compound. The resulting perchloric acid / graphite intercalation compound was then washed with deionized water to a pH of 6.0. Put the laundry into a drying oven, heat it to 90°C for drying treatment, and the drying time is 3 hours. After drying, take it out of the furnace and cool it down to room temperature naturally, then put the dried product into a high-temperature puffing f...

Embodiment 3

[0021] HClO 4 、HNO 3 It is mixed with natural flake graphite according to the weight ratio of 65:2:33. During the mixing process, the HClO 4 Pour into HNO 3 In the container, then join natural flake graphite in the above-mentioned mixed acid and stir 3min. The above natural flake graphite has an average particle size of 32 meshes, a carbon content of 99.92wt.%, the concentration of nitric acid used is 67wt.%, and the concentration of perchloric acid is 70wt.%. The stirred mixture was heated to 70° C., and reacted at this temperature for 30 minutes to obtain a perchloric acid / graphite intercalation compound. The resulting perchloric acid / graphite intercalation compound was then washed with deionized water to a pH of 6.5. Put the laundry into a drying oven, heat it to 95°C for drying treatment, and the drying time is 2 hours. After drying, take it out of the oven and cool it down to room temperature naturally, then put the dried product into a high-temperature expansion fu...

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
thicknessaaaaaaaaaa
densityaaaaaaaaaa
Login to view more

Abstract

The invention relates to a preparation method of a high thermal conductivity natural flexible graphite film. The preparation method comprises the steps that HCLO4 and HNO3 are mixed together, and natural flake graphite is then added in and mixed with HCLO4 and HNO3 so as to obtain a mixture; the mixture is heated to react to obtain a perchloric acid/graphite intercalation compound; and the perchloric acid/graphite intercalation compound is washed with deionized water until the pH value is 5-7, and then drying, expanding and rolling are carried out to obtain the high thermal conductivity natural flexible graphite film. The preparation method has the advantages of no sulfur, no corrosion, high thermal conductivity and controllable thickness.

Description

technical field [0001] The invention belongs to a preparation method of a high thermal conductivity natural flexible graphite film. Background technique [0002] Natural flexible graphite was first successfully developed by Union Carbide Corporation of the United States in 1963. It is a graphite coil or plate made of natural phosphorus flake graphite through purification, acidification intercalation, expansion, compression or rolling. That is, natural flexible graphite. Natural flexible graphite has been widely used in electronics, Petroleum, chemical industry, metallurgy and other sealing fields. [0003] In recent years, based on the high thermal conductivity of graphite microcrystals, the structural unit of natural flexible graphite, scholars at home and abroad have begun to pay attention to the research and development of flexible graphite film materials with high thermal conductivity. Flexible graphite film has excellent properties such as ultra-high thermal conducti...

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
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/205
Inventor 刘占军郭全贵魏兴海陶则超
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap