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Graphene, graphite nanosheets and preparation method

A nano-graphite sheet and graphene technology, applied in the direction of graphene, graphite, nano-carbon, etc., can solve the problems of difficult large-scale application, low output, and incapable of large-scale preparation

Pending Publication Date: 2018-01-16
广东东创氢元新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The graphene obtained by this method is high in quality and has few structural defects, but the yield is too low to be prepared on a large scale, and it is difficult to apply on a large scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Disperse 100 grams of 1,000-mesh commercially available natural graphite in 1,000 grams of deionized water, add 2 grams of carboxymethyl cellulose, and dissolve the carboxymethyl cellulose in the graphite dispersion completely under slow stirring, and circulate it with a colloid mill Disperse twice, and ball mill for 8 hours with a ball mill to obtain a mixed dispersion of graphene and graphite nano flakes.

[0013] The mixed dispersion is separated in a centrifuge, the separation factor of the centrifuge is more than 10,000, and the supernatant is taken to obtain a dispersion of single-layer graphene in dimethylformamide; the remaining dispersion is Dimethylformamide dispersion of oligolayer graphene.

Embodiment 2

[0015] Disperse 100 grams of 1000-mesh commercially available natural graphite in 1000 grams of deionized water, add 100 grams of low-crystallinity nanocellulose aqueous slurry, wherein the solid content of cellulose is 5%, and disperse it twice with a colloid mill , and ball milled with a ball mill for 8 hours to obtain a mixed dispersion of graphene and graphite nanosheets with good dispersibility and anti-sedimentation properties.

Embodiment 3

[0017] Disperse 100 grams of 400-mesh commercially available natural graphite in 1000 grams of deionized water, and add 100 grams of low-crystallinity nanocellulose aqueous slurry, wherein the solid content of cellulose is 5%. Then add 1 gram of carboxymethyl cellulose, under slow stirring, carboxymethyl cellulose is completely dissolved, circulate and disperse twice with a colloid mill, and ball mill with a ball mill for 8 hours to obtain graphene and good dispersibility and anti-sedimentation properties. Mixed dispersion of graphite nano flakes.

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PUM

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Abstract

The invention relates to a mechanochemical method. The mechanochemical method comprises the following step: subjecting natural graphite and synthetic graphite to fine crushing and stripping so as to obtain graphite nanosheets, and even monolayer graphite nanosheets. The graphite nanosheets and the monolayer graphite nanosheets are a novel functional carbon material with high electrical conductivity and high thermal conductivity, can be compounded with organic macromolecules and inorganic materials, and have extensive applications in the fields of electronics, luminescence, batteries, buildingmaterials, decoration, daily use, etc.

Description

technical field [0001] The invention relates to finely pulverizing and exfoliating natural graphite and synthetic graphite by using a dynamic chemical method to obtain nanometer graphite sheets, and even to obtain oligolayer nanometer graphene sheets. The obtained nano-graphite sheets and oligolayer nano-graphene sheets are a new type of functional carbon material with high electrical conductivity and high thermal conductivity, which can be combined with organic polymers or inorganic materials. , decoration, daily use and other fields have a wide range of uses. Background technique [0002] Graphene was discovered in 2004 by two professors at the University of Manchester, UK. The reason why two-dimensional graphene has attracted so much attention is because it has many unparalleled excellent properties, and the second is its unique thermodynamics. Previously, scientists have been working on how to obtain graphite fillers with fewer and fewer layers, but they are all limite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/19C01B32/21
Inventor 冯家臻丁晨妍
Owner 广东东创氢元新能源科技有限公司