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A method for preparing graphene microsheets using a counter-jet jet mill

A technology of graphene microchips and jet mills, which is applied in the direction of graphene and nano-carbon, can solve the problems of complex preparation process, small output, and high production cost of graphene, and achieve uniform dispersion, low production cost, and good fluidity Effect

Active Publication Date: 2017-10-17
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the disadvantages of high production cost of graphene, complex preparation process and small output, the present invention proposes a low-cost method for preparing graphene microchips

Method used

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  • A method for preparing graphene microsheets using a counter-jet jet mill
  • A method for preparing graphene microsheets using a counter-jet jet mill

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A kind of method that utilizes counter-jet jet mill to prepare graphene microsheets:

[0031] (1) Mix 80 parts by weight of expanded graphite powder, 1 part by weight of talc powder, and 0.5 parts by weight of dimethylacetamide in a high-speed mixing reactor at a heating temperature of 250 ° C, at 300 rpm Stir and disperse for 30-60 minutes at a certain speed to obtain a mixed powder;

[0032] (2) Prepare the intercalation agent with ferric chloride, potassium chloride, and polyethylene glycol at a mass ratio of 2:2:1, and then soak the mixed powder obtained in step (1) in the intercalation agent for more than 48 hours, Filter and dry by centrifuge to obtain pre-intercalation powder;

[0033] (3) Feed the pre-intercalation powder obtained in step (2) into the jet-jet pulverizer, which is equipped with two nozzles, one pulverization nozzle sprays into the pulverization chamber at a pressure of 3.0 MPa, and one The feeding nozzle is sprayed into the crushing chamber wit...

Embodiment 2

[0035] A kind of method that utilizes counter-jet jet mill to prepare graphene microsheets:

[0036] (1) Mix 90 parts by weight of highly oriented graphite powder, 5 parts by weight of talc powder and 1.5 parts by weight of dimethylacetamide in a high-speed mixing reactor at a heating temperature of 300 ° C, to Stir and disperse at a speed of 600rpm for 30min to obtain a mixed powder;

[0037] (2) Prepare the intercalation agent with ferric chloride, potassium chloride, and polyethylene glycol at a mass ratio of 3: 3:1, and then soak the mixed powder obtained in step (1) in the intercalation agent for more than 48 hours, Filter and dry by centrifuge to obtain pre-intercalation powder;

[0038] (3) Feed the pre-intercalation powder obtained in step (2) into the jet-jet pulverizer, which is equipped with two nozzles, one pulverization nozzle sprays into the pulverization chamber at a pressure of 4.0 MPa, and one The feeding nozzle is sprayed into the crushing chamber with a pr...

Embodiment 3

[0040] A kind of method that utilizes counter-jet jet mill to prepare graphene microsheets:

[0041] (1) Mix 85 parts by weight of flake graphite powder, 3 parts by weight of talc powder and 0.8 parts by weight of dimethylacetamide in a high-speed mixing reactor at a heating temperature of 260°C, and mix at 400rpm Stir and disperse at a rotating speed of 45min to obtain a mixed powder;

[0042] (2) Prepare the intercalation agent with ferric chloride, potassium chloride, and polyethylene glycol at a mass ratio of 2.1:2.5:1, and then soak the mixed powder obtained in step (1) in the intercalation agent for more than 48 hours, Filter and dry by centrifuge to obtain pre-intercalation powder;

[0043] (3) Send the pre-intercalation powder obtained in step (2) into the jet mill of the jet jet, which is equipped with two nozzles, one of which sprays into the pulverization chamber at a pressure of 3.6 MPa, and one of the jet jet mills. The feeding nozzle is sprayed into the crushin...

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Abstract

The invention relates to the field of graphene materials, in particular to a method for preparing graphene microchips, in particular to a method for preparing graphene microchips using a counter-jet jet mill. The molten ferric chloride and potassium chloride enter the interlayer of graphite, using the brittle characteristics of ferric chloride and potassium chloride crystal grains, and the characteristics of good fluidity and difficult agglomeration of talc powder, in the counter-jet airflow pulverization The powder collides with the high-speed airflow in the machine, and the generated impact force, shear force and friction force will peel off the graphite and talc powder, and then pass through the classification chamber for further classification, and the unqualified powder will flow back to the crushing chamber, and the peeled graphite and talc powder will be separated. Talc powder is produced with the gas to obtain graphene sheets. Realized continuous and large-scale production of graphene microflakes with evenly dispersed layers, good fluidity, and not easy to agglomerate, with high output, low cost, no pollution, and layer thickness that meets the requirements of rubber reinforcement, plastic reinforcement, coating anticorrosion, lubrication, sewage The use requirements in the processing field are conducive to promoting the large-scale application of graphene.

Description

technical field [0001] The invention relates to the field of graphene materials, in particular to a method for preparing graphene sheets, in particular to a method for preparing graphene micro-sheets using a counter-jet jet mill. Background technique [0002] Graphene is another new type of carbon nanomaterial discovered after carbon nanotubes. Its appearance makes the crystal structure of carbon form a complete system including fullerenes, carbon nanotubes, graphene, graphite and diamond. From zero to three-dimensional carbon paradigm. Due to the excellent electrical, mechanical, and optical properties of graphene, the preparation process of graphene has always attracted much attention. At present, the main process for preparing graphene is to adopt the vapor phase deposition method, which uses a gaseous carbon source to decompose at high temperature and deposit on the surface of the substrate. Graphene is prepared by catalytic growth on the surface, which is an important ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/19
Inventor 陈庆叶任海
Owner CHENDU NEW KELI CHEM SCI CO LTD
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