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Method for large-scale clean graphene preparation

A graphene, clean technology, applied in the direction of graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of destroying the integrity of graphene lattice, reducing the conductivity of the system, endangering human health, etc., and achieve the effect of increasing intercalation , Improve the probability of intercalation, and ensure the effect of health and life safety

Active Publication Date: 2016-08-03
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, if a strong oxidant is used to treat graphite, polar groups will be grafted on the surface of the prepared graphene, which will endanger human health and cause environmental pollution, destroy the lattice integrity of graphene, and reduce the electrical conductivity of the system.

Method used

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  • Method for large-scale clean graphene preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) 10 parts by weight of flake graphite with an average particle size of less than 1 mm, 50 parts by weight of water, 1.5 parts by weight of sodium carbonate, and 1.5 parts by weight of sodium lauryl sulfate are prepared into a dispersion suspension, and stirred at a speed of 300 rpm Disperse for 10 minutes until the graphite raw material is uniformly dispersed in the solvent to obtain a dispersion suspension.

[0032] (2) Put the dispersed suspension solution obtained in step (1) into the feed port of the spray device, the feed port is connected to the feeding chamber, and an ultrasonic probe is set inside the feeding chamber, and the ultrasonic power is set to 100KW. After the dispersed suspension solution enters the material delivery chamber from the feed port, the dispersed suspension solution is ultrasonically treated to allow the foaming agent to enter the graphite interlayer to reduce the graphite interlayer force. Compressor, set the air flow rate in the air co...

Embodiment 2

[0036] (1) 25 parts by weight of flake graphite with an average particle size of less than 1 mm, 60 parts by weight of water, 10 parts by weight of sodium carbonate, and 5 parts by weight of sodium lauryl sulfate are prepared into a dispersion suspension, and stirred at a speed of 400 rpm Disperse for 10 minutes until the graphite raw material is uniformly dispersed in the solvent to obtain a dispersion suspension.

[0037] (2) Put the dispersed suspension solution obtained in step (1) into the feed port of the spray device, the feed port is connected to the feeding chamber, and an ultrasonic probe is set inside the feeding chamber, and the ultrasonic power is set to 100KW. After the dispersed suspension solution enters the material delivery chamber from the feed port, the dispersed suspension solution is ultrasonically treated to allow the foaming agent to enter the graphite interlayer to reduce the graphite interlayer force. Compressor, set the air flow rate in the air compr...

Embodiment 3

[0041] (1) 25 parts by weight of expanded graphite with an average particle size of less than 1 mm, 60 parts by weight of water, 10 parts by weight of a mixture of sodium carbonate and sodium bicarbonate, and 5 parts by weight of sodium dodecylbenzenesulfonate are prepared into a dispersed suspension liquid, stirred and dispersed at 400rpm for 15 minutes, until the expanded graphite was uniformly dispersed in the solvent, and a dispersion suspension was obtained.

[0042] (2) Add the dispersed suspension solution obtained in step (1) into the feed port of the spray device, the feed port is connected to the feeding chamber, and two ultrasonic probes are installed inside the feeding chamber, and the ultrasonic power is set to 200KW. After the dispersed suspension solution enters the material delivery chamber from the feed port, the dispersed suspension solution is ultrasonically treated to allow the foaming agent to enter between graphite layers to reduce the force between graphi...

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Abstract

The invention provides a method for large-scale clean graphene preparation. Graphite is used as a raw material, spray drying equipment is used, mechanical peeling and powder drying are integrated in the spray drying machine, a graphene material is continuously, stably, and cleanly produced in an environment-friendly mode, nano graphene powder or micron grapheme powder is limited in a drying chamber to be processed, and the technical defects that the prior art is only used for preparing graphene powder in a drying mode, dust pollution is serious in the production process, and graphene cannot be produced continuously are overcome. The technical effects of continuous, clean and environment-friendly graphene preparation are achieved, and industrial production of graphene dry powder is promoted. Furthermore, shearing and peeling are completed in the spray drying machine in one step, uniform dispersion is achieved, the layered structure of graphene is reserved to the maximum, the graphene material is continuously and stably prepared, surface electric topological symmetry of graphene is not destroyed, and the quality of graphene finished product is further ensured.

Description

technical field [0001] The invention relates to a method for preparing graphene, in particular to a large-scale clean preparation method for graphene. Background technique [0002] In 2004, two scientists from the University of Manchester in the United Kingdom discovered graphene using the method of micromechanical exfoliation, and won the Nobel Prize in Physics in 2010. Graphene is a planar structure material composed of single-atom-thick carbon atoms combined by sp2 bonds. The carbon-carbon bond length is about 0.142nm. There are three σ bonds in each lattice, and the p orbitals of all carbon atoms Both are perpendicular to the sp2 hybridization plane, and form a delocalized π bond throughout the graphene in a side-by-side manner. Theoretically, this has a perfect hexagonal network structure, showing excellent electronic stability, thermal conductivity, optical properties, and mechanical properties. Since the discovery of graphene, due to its excellent performance and hu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
CPCC01B32/19C01B2204/04
Inventor 陈庆曾军堂廖大应陈兵
Owner CHENDU NEW KELI CHEM SCI CO LTD
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