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A method for large-scale preparation of nano-graphene materials using hydraulic shearing

A nano-graphene and hydraulic shearing technology, applied in the field of nano-materials, can solve problems such as uniformity and inability to prepare sizes, and achieve the effects of not being easy to agglomerate, realizing large-scale continuous production, and uniform sizes

Active Publication Date: 2018-04-17
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problem that the current mechanical stripping equipment cannot prepare graphene with uniform size, uniform dispersion and stable quality, the present invention proposes to use a variety of mechanical stripping equipment and mixing equipment in series to strip and mix graphene to solve the problems encountered in the current preparation of graphene. to the problem

Method used

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  • A method for large-scale preparation of nano-graphene materials using hydraulic shearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 5g of potassium ferrate, dissolve it in 1L of deionized water, then weigh 50g of graphite powder, and preliminarily mix it with the potassium ferrate solution under magnetic stirring to obtain a graphite mixed solution;

[0031] will step The graphite mixture in the mixture is injected into the grinding and dispersing machine for the first mechanical peeling, the rotating speed is 500rpm, and the grinding time is 2h; the graphene suspension with larger particle size is obtained;

[0032] will step The graphene suspension prepared by the first mechanical exfoliation in the process is directly sent into the high-shear emulsifier through a pipeline, and mechanically exfoliated and dispersed for 0.5h under a shear force of 2000ips to obtain graphite with a smaller size and more uniform dispersion. olefin dispersion;

[0033] will step After the second mechanical stripping and mixing, the graphene dispersion is directly sent to the high-pressure homogenize...

Embodiment 2

[0037] Weigh 10g potassium ferrate, dissolve it in 1L deionized water, then weigh 50g graphite powder, and preliminarily mix it with potassium ferrate solution under magnetic stirring to obtain graphite mixed solution;

[0038] will step The graphite mixture in the mixture is injected into the grinding and dispersing machine for the first mechanical peeling, the rotating speed is 500rpm, and the grinding time is 2h; the graphene suspension with larger particle size is obtained;

[0039] will step The graphene suspension prepared by the first mechanical exfoliation in the process is directly sent into the high-shear emulsifier through a pipeline, and mechanically exfoliated and dispersed for 0.5h under a shear force of 2000ips to obtain graphite with a smaller size and more uniform dispersion. olefin dispersion;

[0040] will step After the second mechanical stripping and mixing, the graphene dispersion is directly sent to the high-pressure homogenizer through the ...

Embodiment 3

[0044] Weigh 10g potassium ferrate, dissolve it in 1L deionized water, then weigh 50g graphite powder, and preliminarily mix it with potassium ferrate solution under magnetic stirring to obtain graphite mixed solution;

[0045] will step The graphite mixed solution in the mixture is injected into the grinding and dispersing machine for the first mechanical peeling, the rotating speed is 1000rpm, and the grinding time is 2h; the graphene suspension with larger particle size is obtained;

[0046] will step The graphene suspension prepared by the first mechanical exfoliation in the process is directly sent into the high-shear emulsifier through a pipeline, and mechanically exfoliated and dispersed for 0.5h under a shear force of 2000ips to obtain graphite with a smaller size and more uniform dispersion. olefin dispersion;

[0047] will step After the second mechanical stripping and mixing, the graphene dispersion is directly sent to the high-pressure homogenizer thr...

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Abstract

The invention provides a method for preparing nanometer graphene materials in a large scale mode through hydraulic shearing. The method includes the steps that graphite powder is added into liquid, a small number of oxidizing agents are added, oxidizing agent molecules rapidly and alternately enter graphite through a multifunctional grinding dispersion machine in an inserted mode, a high shear emulgator and a high-pressure homogenizer which are connected in series, and the materials are sheared and peeled under the hydraulic effect through continuous mechanical force, and are rapidly layered. The problem that graphene can not be prepared in a large scale mode with high quality and low cost at present is solved, it is guaranteed that the graphene structure is not damaged, and the obtained graphene can be widely applied to the lithium battery field, the super capacitor field, the polymer composite material field, the heat-conduction and heat-radiation film field, the functional coating field, the national-defense and military-industry field and the like.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, and mainly relates to a method for large-scale preparation of nanometer graphene materials by using hydraulic shearing. Background technique [0002] Since the discovery of graphene materials in 2004, scientific researchers have conducted in-depth research on it for a long time, and have concluded from the research that graphene is a hexagonal structure composed of SP2 hybrid orbitals. The presence of graphene makes graphene have good electrical conductivity and can be used as a good conductor in the fields of optoelectronic devices and electrochemical energy. With the deepening of research, the optical properties, mechanical properties, and catalytic properties of graphene have been discovered one after another, making it widely used in electromagnetic shielding materials, microwave absorbing materials, gas sensors, catalysts, and other fields. [0003] Graphene has excellent perfor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/19
CPCC01P2004/64
Inventor 陈庆曾军堂廖大应陈兵
Owner CHENDU NEW KELI CHEM SCI CO LTD
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