Method for peeling off graphite to obtain graphene based on shear force machine

A technology of exfoliating graphite and shear force, which is applied in the field of nanomaterial preparation, can solve the problems of high equipment requirements and high cost, and achieve the effect of simple raw materials and solvents, mild conditions, and no waste liquid pollution

Inactive Publication Date: 2016-11-23
苏州烯墨纳米科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are many methods for synthesizing graphene, such as redox method and chemical vapor deposition method, but because the redox method will introduce defects and oxygen-containing functional groups, the chemical vapor deposition method has high equipment requirements and high cost, which limits its wide application. application

Method used

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  • Method for peeling off graphite to obtain graphene based on shear force machine
  • Method for peeling off graphite to obtain graphene based on shear force machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Step 1, weigh 50 mg of dense crystalline graphite and add it to 200 mL of water / ethanol (volume ratio 55:45):

[0016] In step 2, the uniformly mixed solution is placed in a shear force machine for 3 hours, and post-treatments such as standing still and centrifuging at 1000 rpm / min are performed to obtain graphene.

Embodiment 2

[0018] Step 1, weigh 50mg flake graphite and add in 200mL water / ethanol (volume ratio is 55:45);

[0019] In step 2, the uniformly mixed solution is placed in a shear force machine for 5 hours, and post-treatments such as standing still and centrifuging at 1000 rpm / min are performed to obtain graphene.

Embodiment 3

[0021] Step 1, weigh 50 mg of aphanitic graphite and add it to 200 mL of water / ethanol (volume ratio of 55:45);

[0022] In step 2, place the uniformly mixed solution in a shear force machine for 4 hours, and perform post-treatments such as standing still and centrifuging at 1000 rpm / min to obtain graphene.

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Abstract

The invention relates to the technical field of nanometer preparation, in particular to a method for peeling off graphite to obtain graphene based on a shear force machine. The method comprises the specific steps that 5-1*10<9> mg of one or more of massive crystalline graphite, crystalline flake graphite, cryptocrystalline graphite, expanded graphite and highly oriented pyrolytic graphite are weighed, 50-5*10<6> mL of water and a mixing solvent with 10 or smaller carbon atom alcohol are added, the uniformly-mixed solution is placed into the shear force machine for performing peeling for 0.3-120 h, standing is performed, the centrifuging speed is 100-10000 rpm / min, and post-treatment is performed, so that graphene is obtained. The preparation method is mild in condition, the reaction is green, adopted raw materials and solvents are simple, no liquid waste pollution exists, large-scale preparation can be performed, and the method has the application prospect for producing graphene.

Description

technical field [0001] The invention relates to the technical field of preparation of nanometer materials, in particular to a method for obtaining graphene based on shearing force machine exfoliating graphite. Background technique [0002] Graphene has attracted great research interest due to its excellent electronic, chemical, mechanical, and thermal properties. Graphene can be used in lithium-ion batteries, coatings, supercapacitors, touch screens, thermal conductive films, adsorption of oily ions and other fields. There are many methods for synthesizing graphene, such as redox method and chemical vapor deposition method, but because the redox method will introduce defects and oxygen-containing functional groups, the chemical vapor deposition method has high equipment requirements and high cost, which limits its wide application. application. The liquid phase exfoliation method can make up for the above-mentioned shortcomings because it does not destroy the intrinsic str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 徐明瀚
Owner 苏州烯墨纳米科技有限公司
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