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Preparation method of graphene dispersion liquid

A technology of graphene dispersion liquid and graphene suspension liquid, which is applied in the field of dispersion liquid, can solve the problems of chemical composition and physical morphology changes of graphene materials, and achieve the effects of good anti-sedimentation performance, strong applicability, and good stability

Inactive Publication Date: 2018-11-02
GUANGDONG MORION NANOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the commonly used methods is to chemically modify graphene to improve its dispersion performance, but this method will lead to changes in the chemical composition and physical morphology of graphene materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method for a graphene dispersion, comprising the following steps: A, preparation of graphene powder: get graphite flakes, adopt the Hummers method to prepare a graphene oxide suspension, and carry out ultrasonication, washing, and reduction to the graphene oxide suspension Obtain graphene powder after drying and treatment; B, main material mixing: take solvent and graphene powder and stir and mix until uniform, then ultrasonic cleaning is carried out to mixed solution, carry out homogenization treatment subsequently; C, dispersion liquid preparation: take Add dispersants and surfactants to the mixed solution obtained in step B, stir and mix until uniform, then perform ultrasonic cleaning on it, and then perform centrifugation to remove large graphene particles, and take the upper clear night, which is graphene dispersion. liquid.

[0024] The ultrasonic, washing, reduction and drying treatments in the step A are specifically: ultrasonically treat the graph...

Embodiment 2

[0034] A preparation method for a graphene dispersion, comprising the following steps: A, preparation of graphene powder: get graphite flakes, adopt the Hummers method to prepare a graphene oxide suspension, and carry out ultrasonication, washing, and reduction to the graphene oxide suspension Obtain graphene powder after drying and treatment; B, main material mixing: take solvent and graphene powder and stir and mix until uniform, then ultrasonic cleaning is carried out to mixed solution, carry out homogenization treatment subsequently; C, dispersion liquid preparation: take Add dispersants and surfactants to the mixed solution obtained in step B, stir and mix until uniform, then perform ultrasonic cleaning on it, and then perform centrifugation to remove large graphene particles, and take the upper clear night, which is graphene dispersion. liquid.

[0035] The ultrasonic, washing, reduction and drying treatments in the step A are specifically: ultrasonically treat the graph...

Embodiment 3

[0045] A preparation method for a graphene dispersion, comprising the following steps: A, preparation of graphene powder: get graphite flakes, adopt the Hummers method to prepare a graphene oxide suspension, and carry out ultrasonication, washing, and reduction to the graphene oxide suspension Obtain graphene powder after drying and treatment; B, main material mixing: take solvent and graphene powder and stir and mix until uniform, then ultrasonic cleaning is carried out to mixed solution, carry out homogenization treatment subsequently; C, dispersion liquid preparation: take Add dispersants and surfactants to the mixed solution obtained in step B, stir and mix until uniform, then perform ultrasonic cleaning on it, and then perform centrifugation to remove large graphene particles, and take the upper clear night, which is graphene dispersion. liquid.

[0046] The ultrasonic, washing, reduction and drying treatments in the step A are specifically: ultrasonically treat the graph...

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PUM

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Abstract

The invention relates to the technical field of dispersion liquid, in particular to a preparation method of a graphene dispersion liquid. The method includes the steps of: A. taking natural flake graphite, employing chemical redox process to prepare a graphene oxide suspension, and conducting ultrasonic treatment, washing, reduction and drying treatment to obtain graphene powder; B. mixing a solvent with the graphene powder till uniform, then conducting ultrasonic cleaning treatment, and then performing homogenizing treatment; C. adding a dispersant and a surfactant, conducting mixing to uniform, then performing ultrasonic cleaning treatment, carrying out centrifugal treatment, removing large graphene particles, and taking the supernatant, thus obtaining the graphene dispersion liquid. Thegraphene dispersion liquid obtained by the preparation method provided by the invention has good dispersibility and anti-settling performance, and also the chemical composition and physical morphology are not destructed. Therefore, the graphene dispersion liquid obtained according to the invention retains the original properties of graphene, has stronger applicability, and can be widely used forlubrication, thermal conductive composite materials and other fields.

Description

technical field [0001] The invention relates to the technical field of dispersion liquid, in particular to a preparation method of graphene dispersion liquid. Background technique [0002] Since its discovery in 2004, graphene has rapidly grown into a new star in the field of material science. Although it was discovered in a short time, due to its perfect hexagonal crystal structure and many super-excellent properties endowed by this special structure Excellent properties, such as a theoretical specific surface area of ​​up to 2600m2 / g, a thermal conductivity of 3000W / (m.k), a tensile strength of 1060Gpa, a perfect quantum tunneling effect and a half-integer quantum Hall effect, etc., make it unique in real life Numerous potential fields of application. The preparation methods of graphene include redox method, mechanical exfoliation method, SiC epitaxial growth, chemical vapor deposition (CVD), liquid phase exfoliation method, and bottom-up synthesis. Due to the strong π-π...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/19C01B32/194
CPCC01B2204/32C01B32/19C01B32/194
Inventor 蔡金明郭畅蔡晓明赵恒
Owner GUANGDONG MORION NANOTECHNOLOGY CO LTD
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