A kind of highly conductive graphene flexible composite film and preparation method thereof

A graphene flexible and highly conductive technology, applied in the field of highly conductive graphene flexible composite film and its preparation, to achieve the effects of improving lap joint efficiency, improving conductivity, and high conductivity

Active Publication Date: 2020-05-22
常州二维暖烯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the properties of highly conductive graphene flexible composite films, such as conductivity, film thickness, flexibility, toughness, etc., have yet to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0036] Prepare highly conductive graphene flexible composite film according to the following steps:

[0037] 1) Graphene powder is processed to improve conductivity: Graphene powder is prepared by a physical exfoliation method, with an average number of layers of 10 layers and a sheet diameter of 10um; the processing method steps of the graphene are as follows:

[0038] ①Put the graphene into the solvent N,N-dimethylformamide and shear it off;

[0039] ②Filter the solvent to obtain a filter cake with a solid content of about 50% or more;

[0040] ③The filter cake is quickly pushed into the high-temperature furnace protected by an inert atmosphere, and thermally expands at 800 degrees Celsius;

[0041] ④Put the powder obtained by thermal expansion into a graphitization furnace, and treat it at a high temperature of 2500 degrees Celsius to obtain the treated graphene powder, and measure the electrical conductivity of the graphene powder to be 10 6 -10 7 S / m.

[0042] 2) Comp...

preparation Embodiment 2

[0047] Prepare highly conductive graphene flexible composite film according to the following steps:

[0048] 1) Graphene powder is processed to improve conductivity: Graphene powder is prepared by oxidation-reduction method, with an average number of layers of 5 layers and a sheet diameter of 30um; the processing method steps of the graphene are as follows:

[0049] ①Put the graphene into the solvent N,N-dimethylformamide and shear it off;

[0050] ②Filter the solvent to obtain a filter cake with a solid content of about 50% or more;

[0051] ③The filter cake is quickly pushed into the high-temperature furnace protected by an inert atmosphere, and thermally expands at 900 degrees Celsius;

[0052] ④Put the powder obtained by thermal expansion into a graphitization furnace, and treat it at a high temperature of 2700 degrees Celsius to obtain the treated graphene powder, and measure the electrical conductivity of the graphene powder to be 10 6 -10 7 S / m.

[0053] 2) Composit...

preparation Embodiment 3

[0058] Prepare highly conductive graphene flexible composite film according to the following steps:

[0059] 1) Graphene powder is processed to improve conductivity: Graphene powder is prepared by physical exfoliation, with an average number of layers of 5 layers and a sheet diameter of 20um; the processing method steps of the graphene are as follows:

[0060] ①Put the graphene into the solvent N,N-dimethylformamide and shear it off;

[0061] ②Filter the solvent to obtain a filter cake with a solid content of about 50% or more;

[0062] ③The filter cake is quickly pushed into the high-temperature furnace protected by an inert atmosphere, and thermally expands at 800 degrees Celsius;

[0063] ④Put the powder obtained by thermal expansion into a graphitization furnace, and treat it at a high temperature of 2700 degrees Celsius to obtain the treated graphene powder, and measure the electrical conductivity of the graphene powder to be 10 6 -10 7 S / m.

[0064] 2) Composite: Mix...

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Abstract

The invention discloses a method for preparing a high-conductivity graphene flexible compound membrane. The method for preparing the high-conductivity graphene flexible compound membrane disclosed by the invention comprises the following steps: 1) treating graphene powder for increasing the conductivity: performing solvent peeling, thermal expansion and high-temperature thermal treatment on the graphene powder, thereby increasing the conductivity; 2) compounding: mixing the graphene powder acquired in the step 1), elastic macromolecular grain and solvent, thereby acquiring a mixture, and then adding thixotropic agent and viscosity modifier for controlling the dynamic viscosity to 6000-8000mpa; 3) forming a membrane: preparing the mixture into the membrane. The invention also discloses the high-conductivity graphene flexible compound membrane prepared according to the method disclosed by the invention.

Description

technical field [0001] The invention belongs to the technical field of graphene conductive films, in particular to a highly conductive graphene flexible composite film and a preparation method thereof. Background technique [0002] At present, as a conductive material, graphene products generally have a series of problems such as poor consistency, poor conductivity, and complicated dispersion and compounding process in the polymer material matrix. Therefore, graphene conductive composite materials with ultra-high conductivity are needed. [0003] Through the continuous preparation of graphene, the optimization of the number of layers, and the dispersion and compounding of graphene, a high-conductivity graphene composite film can be prepared. Compared with the currently known conductive composite materials, the graphene high-conductivity composite film is lighter and thinner, and the electrical resistivity is smaller: its electrical conductivity is 100 times that of ordinary ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08L77/00C08L1/28C08L27/06C08L91/00C08L91/06C08K9/00C08K9/04C08K3/04
CPCC08K2201/001C08K2201/003C08L27/06C08L75/04C08L101/00C08L2203/16C08L2203/20C08L2205/03C08L2207/04C08L77/00C08L1/286C08K9/00C08K9/04C08K3/04C08L91/00C08L91/06
Inventor 周振义宋琪曾祥英
Owner 常州二维暖烯科技有限公司
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