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Graphene conductive ink, graphene conductive film and preparation methods and applications thereof

A technology of conductive ink and graphene, which is applied in the direction of equipment, ink, and application for manufacturing conductive/semiconductive layers, and can solve problems such as cumbersome process, unfavorable industrial application, and high cost

Pending Publication Date: 2021-07-02
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method was proposed and widely used by researchers from the Graphene Innovation Center of Cambridge University and the Italian Institute of Technology, but in the process of stripping graphene, they all used N-methylpyrrolidone with a high boiling point as the dispersion solvent of graphite, which gives Subsequent separation of the exfoliated graphene mixture and further functionalization / ink processing pose great challenges, and generally require solvent exchange to remove N-methylpyrrolidone and redisperse graphene, which is cumbersome, inefficient and costly , not conducive to industrial applications

Method used

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  • Graphene conductive ink, graphene conductive film and preparation methods and applications thereof
  • Graphene conductive ink, graphene conductive film and preparation methods and applications thereof
  • Graphene conductive ink, graphene conductive film and preparation methods and applications thereof

Examples

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Effect test

Embodiment 1

[0062] Mix and stir ethanol and ethyl cellulose to prepare 300 mL of ethyl cellulose / ethanol solution with a concentration of 10 mg / mL; then weigh 15 g of scaly natural graphite and add it to the above ethyl cellulose / ethanol solution. A homogeneous emulsifier was used to shear and mix the above mixed solution for 60 min at a speed of 1000 rpm to obtain a pretreated graphite dispersion. The initial pre-treated graphite dispersion is added to the feed cup of the high-pressure micro-jet homogenizer, first circulated 10 times through the 300μm nozzle, and the pressure is 8000psi; then circulated 40 times through the 180μm nozzle, the pressure is 20000psi. After the high-pressure peeling action of the high-pressure pump, the graphene dispersion is obtained. In order to remove larger and incompletely peeled sheets, the graphene dispersion was centrifuged at a speed of 500 rpm for 10 min to collect the upper dispersion. The upper dispersion liquid is a uniform graphene conductive i...

Embodiment 2

[0065] Mix and stir ethanol and ethyl cellulose to prepare 300 mL of ethyl cellulose / ethanol solution with a concentration of 10 mg / mL; then weigh 9 g of worm-like expanded graphite and add it to the above ethyl cellulose / ethanol solution. Use a homogeneous emulsifier to shear and mix the above mixed solution for 60 minutes at a speed of 1000 rpm to obtain a pretreated graphite dispersion. The initial pre-treated graphite dispersion is added to the feed cup of the high-pressure micro-jet homogenizer, first circulated 10 times through the 300μm nozzle, and the pressure is 8000psi; then circulated 40 times through the 180μm nozzle, the pressure is 20000psi. After the high-pressure peeling action of the high-pressure pump, the graphene dispersion is obtained. In order to remove larger and incompletely peeled sheets, the graphene dispersion was centrifuged at a speed of 500 rpm for 10 min to collect the upper dispersion. The upper dispersion liquid is a uniform graphene conductiv...

Embodiment 3

[0068] Mix and stir ethanol and ethyl cellulose to prepare 300 mL of ethyl cellulose / ethanol solution with a concentration of 30 mg / mL; then weigh 15 g of scaly natural graphite and add it to the above ethyl cellulose / ethanol solution. Use a homogeneous emulsifier to shear and mix the above mixed solution for 60 minutes at a speed of 1000 rpm to obtain a pretreated graphite dispersion. The initial pre-treated graphite dispersion is added to the feed cup of the high-pressure micro-jet homogenizer, first circulated 10 times through the 300μm nozzle, and the pressure is 8000psi; then circulated 40 times through the 180μm nozzle, the pressure is 20000psi. After the high-pressure peeling action of the high-pressure pump, the graphene dispersion is obtained. In order to remove larger and incompletely peeled sheets, the graphene dispersion was centrifuged at a speed of 500 rpm for 5 min to collect the upper dispersion. The upper dispersion liquid is a uniform graphene conductive ink...

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Abstract

The invention discloses graphene conductive ink, a graphene conductive film and preparation methods and applications of the graphene conductive ink and the graphene conductive film. The graphene conductive ink comprises graphene, a cellulose substance and a solvent, wherein the solvent is selected from green low-boiling-point solvents, and the cellulose substance is selected from nonionic cellulose substances. The conductive ink is prepared by adopting a high-pressure microjet method. Compared with a traditional oxidation-reduction method, the graphene prepared by the method does not need to be oxidized, so that the graphene has high conductivity. The preparation route is simple and convenient in process, and continuous large-scale production can be realized; and by adjusting the concentration of ethyl cellulose, the graphene can be directly prepared into printable ink.

Description

technical field [0001] The invention relates to the field of graphene functional materials, in particular to a graphene conductive ink, a graphene conductive film and a preparation method and application thereof. Background technique [0002] Graphene is a sp 2 Bonded two-dimensional monolayer materials, since their discovery by Novoselov et al. in 2004, have aroused great interest among researchers due to their excellent properties. Due to the unique two-dimensional structure of graphene, it has many extraordinary properties, such as high carrier fluidity, high thermal conductivity, high optical transmittance, high tensile strength, high Young's modulus and excellent flexibility, extremely high specific surface area. Therefore, graphene is expected to be used in energy conversion and storage, sensor devices, and drug delivery carriers, etc., but the current mainstream methods for preparing graphene mainly include bottom-up and top-down methods. In addition, taking advant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/52C09D11/14C09D11/033H01B1/04H01B5/14H01B13/00
CPCC09D11/033C09D11/14C09D11/52H01B1/04H01B5/14H01B13/0026
Inventor 徐凌云张礼强郑龙辉吴立新
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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