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Method for preparing graphene nanoplatelets with disk type jet mill

A technology of graphene microchips and jet pulverizers, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of small output, high production cost of graphene, complicated preparation process, etc., and achieve low cost and high production efficiency. The method is easy and the number of layers is uniformly dispersed

Active Publication Date: 2016-04-27
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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  • Method for preparing graphene nanoplatelets with disk type jet mill
  • Method for preparing graphene nanoplatelets with disk type jet mill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing graphene microflakes using a disc jet mill:

[0029] (1) Mixing 90 parts by weight of highly oriented graphite powder and 0.5 parts by weight of benzyl benzoate in a high-speed mixing reactor, stirring and dispersing for 45 min at a rotating speed of 400 rpm, to obtain mixed powder;

[0030] (2) ferric chloride, acetic anhydride and acetic acid are prepared into intercalating agent with mass ratio of 2:1:1, and then the mixed powder obtained in step (1) is soaked in a closed high-speed agitator equipped with intercalating agent 15h, during the soaking process, the air pressure of the closed high-speed agitator was pumped to 50KPa, while stirring at a speed of 300rpm; then the pre-intercalated powder was obtained by filtering and drying through a centrifuge;

[0031] (3) The pre-intercalated powder obtained in step (2) is sent into a disc jet mill, which is provided with eight working nozzles, each of which is sprayed into the working cavity at a p...

Embodiment 2

[0033] A method for preparing graphene microflakes using a disc jet mill:

[0034] (1) Mixing 100 parts by weight of thermally cracked graphite powder and 1.5 parts by weight of benzyl benzoate in a high-speed mixing reactor, stirring and dispersing for 60 min at a rotating speed of 500 rpm, to obtain mixed powder;

[0035] (2) ferric chloride, acetic anhydride and acetic acid are prepared into intercalating agent with mass ratio of 3:1.5:1, and then the mixed powder obtained in step (1) is soaked in a closed high-speed agitator equipped with intercalating agent 20h, during the soaking process, the air pressure of the airtight high-speed agitator was pumped to 60KPa, while stirring at a speed of 500rpm; then the pre-intercalated powder was obtained by filtering and drying through a centrifuge;

[0036] (3) The pre-intercalated powder obtained in step (2) is sent to the disc jet mill, which is provided with eight working nozzles, each of which is sprayed into the working chambe...

Embodiment 3

[0038] A method for preparing graphene microflakes using a disc jet mill:

[0039] (1) 95 parts by weight of expanded graphite powder and 0.8 parts by weight of benzyl benzoate are mixed in a high-speed mixing reaction machine, stirred and dispersed for 50 min at a rotating speed of 450 rpm to obtain mixed powder;

[0040] (2) ferric chloride, acetic anhydride and acetic acid are prepared into intercalation agent with mass ratio of 2.4:1.2:1, then the mixed powder obtained in step (1) is soaked in a closed high-speed agitator equipped with intercalation agent 18h, during the soaking process, the air pressure of the closed high-speed agitator was pumped to 55KPa, while stirring at a speed of 360rpm; then the pre-intercalated powder was obtained by filtering and drying through a centrifuge;

[0041] (3) The pre-intercalated powder obtained in step (2) is sent into the disc jet mill, which is provided with eight working nozzles, each of which is sprayed into the working cavity at...

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Abstract

The invention relates to the field of graphene materials, in particular to a method for preparing graphene nanoplatelets with a disk type jet mill. Graphite powder is subjected to heat treatment firstly, then graphene is pretreated with an intercalation agent, Van der Waals's force between graphite layers is decreased, graphite layers are easier to strip, the graphite powder is added to the disk type jet mill, graphite rubs and collides with one another in jet stream collisions to produce shear force serving as the main force, friction force and impact force, graphite layers are stripped, and the graphene nanoplatelets are obtained. Continuous and mass production of the graphene nanoplatelets with uniform layers is realized, the yield is high, the cost is low, pollution is avoided, the layer thickness meets the use requirement in fields of rubber reinforcement, plastic reinforcement, coating corrosion prevention, lubrication and sewage treatment, and large-scale application of graphene is promoted.

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 disc-type jet mill. Background technique [0002] Graphene is another new type of carbon nanomaterial discovered after carbon nanotubes. It is a two-dimensional carbon film with a thickness of only one atom. It is the only material composed of a single layer of atoms found so far. The carbon atoms in the middle are connected by chemical bonds to form a hexagonal network. Because the chemical bonds between carbon atoms are composed of sp2 hybrid orbitals, graphene is very tenacious, with bendable, strong electrical conductivity, good mechanical strength, and good light transmission. The excellent properties that other new materials do not have have made the preparation method of graphene attract much attention. [0003] Chinese Invention Patent Application No. 2014106389...

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 陈庆叶任海
Owner CHENDU NEW KELI CHEM SCI CO LTD
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