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Preparation method of graphene material by dry air flow stripping and graphene material

A technology of graphene and gas flow, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problem that graphene is difficult to adapt to industrial application needs, and achieve significant market application value, small investment, and uniform distribution

Active Publication Date: 2016-10-12
陕西蓝江赛久信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the defect that the current preparation of graphene is difficult to meet the needs of industrial applications, the present invention proposes a method for preparing graphene materials by using airflow continuous shear exfoliation under dry conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Flake graphite and composite inorganic powder are composed of spherical barite powder and mica powder, and the surfactant sodium lauryl sulfate is mixed evenly at a mass ratio of 100:50:1;

[0034] (2) The mixture obtained in step (1) is continuously added to the flat jet mill through the conveying device, and the jet mill uses high-speed airflow to apply shear force to the mixture;

[0035] (3) Rotated by high-speed airflow in the flat jet mill, under the action of high-speed airflow, the airflow, graphite powder, and composite inorganic powder collide with each other at high speed, because the composite inorganic powder has different shapes, hardness, and particle size, thus During the rotation process, the large graphite particles are refined, rubbed, and peeled off at the same time. The powder that meets the requirements is led to the collection bag with the airflow above the crushing chamber to obtain graphene materials. The large particle powder continues to be...

Embodiment 2

[0038] (1) Mix expanded graphite, composite inorganic powder consisting of lithium borosilicate glass and lithium iron phosphate, and surfactant naphthalenesulfonic acid formaldehyde condensate sodium salt at a mass ratio of 100:20:1;

[0039] (2) The mixture obtained in step (1) is continuously added to the jet mill through the conveying device, and the jet mill uses high-speed airflow to apply shear force to the mixture;

[0040] (3) The high-speed airflow is rotated in the jet jet mill. Under the action of the high-speed airflow, the airflow, graphite powder, and composite inorganic powder collide with each other at high speed. Due to the different shapes, hardness, and particle sizes of the composite inorganic powder, During the rotation process, the large graphite particles are refined, rubbed, and peeled off at the same time. The powder that meets the requirements is led to the collection bag with the airflow above the crushing chamber to obtain graphene materials. The la...

Embodiment 3

[0043] (1) Mix pyrolytic graphite, composite inorganic powder composed of spherical silica and rod-shaped wollastonite, and surfactant titanate coupling agent at a mass ratio of 100:200:3;

[0044] (2) The mixture obtained in step (1) is continuously fed into the fluidized bed jet mill through the conveying device, and the jet mill uses high-speed airflow to apply shear force to the mixture;

[0045] (3) Rotated by high-speed airflow in the airflow mill, under the action of high-speed airflow, the airflow, graphite powder, and composite inorganic powder collide with each other at high speed. Due to the different shapes, hardness, and particle sizes of the composite inorganic powder, during the rotation process At the same time, the large graphite particles are refined, rubbed, and peeled off. The powder that meets the requirements is led to the collection bag with the airflow above the crushing chamber to obtain graphene materials. The large particle powder continues to be crus...

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Abstract

The invention relates to the field of graphene materials, in particular to a preparation method of graphene material by dry air flow stripping. The preparation method is characterized in that under the complete action of air flow, by utilizing the difference of shear force of a composite inorganic powder with different shape, hardness and / or particle size in high-speed air flow, graphite is performed with micro-cutting, grinding and friction striping when the composite inorganic powder acts with the graphite, so as to obtain the graphene material. The preparation method has the advantages that the energy is transferred by the composite inorganic powder in the high-speed air flow, the defect of difficulty in grinding and thinning in the ball grinding process is overcome, the obtained graphene material has uniform distribution, high density and no agglomeration, and the graphene material can be directly added into battery materials, rubbers, plastics, coatings, lubricating oils and the like; the continuous sealed production is realized, the investment is little, the cost is low, the pollution to environments is avoided, the output is high, and the market application value is obvious.

Description

technical field [0001] The invention relates to the field of graphene preparation, in particular to a method for exfoliating graphene materials by high-speed air flow, in particular to a graphene material prepared by exfoliating the method. Background technique [0002] Graphene is a single piece of graphite composed of carbon atoms in sp2 hybridization and arranged in a two-dimensional hexagonal lattice. Due to its special monoatomic layer structure and excellent crystallographic properties, graphite has excellent electrical, mechanical, optical and other properties, and has great application prospects in the field of new materials. [0003] At present, the effective preparation method of graphene is to subject graphite to strong oxidation treatment. After obtaining graphite oxide, it is easy to peel off to prepare graphene oxide due to the weakened interlayer force, and finally obtain graphene through reduction treatment. Due to the strong oxidation, the graphene interfac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
CPCC01B2204/04C01B2204/32
Inventor 陈庆曾军堂
Owner 陕西蓝江赛久信息科技有限公司
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