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Film made from graphene-carbon nanotube composite material and preparation method of film

A technology of composite film and carbon nanotubes, which is applied in the field of preparation and application of nanocomposite materials, to achieve the effects of improving the overall thermal conductivity, increasing composite strength, and improving the uniformity and flatness of film formation

Inactive Publication Date: 2014-04-16
ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, there is no relevant literature or patent report on graphene-carbon nanotube composite heat-conducting film and its preparation method.

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  • Film made from graphene-carbon nanotube composite material and preparation method of film

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Embodiment 1

[0035] (1) Preparation of reduced graphene solution: at 25°C, measure 20 mL of DMF as a dispersion solvent, weigh 0.1 g of reduced graphene, and obtain a uniformly dispersed reduced graphene solution by mechanical stirring and ultrasound;

[0036](2) Preparation of single-walled carbon nanotube solution: at 25°C, measure 20 mL of DMF as a dispersing solvent, weigh 0.1 g of single-walled carbon nanotube, and obtain a uniformly dispersed single-walled carbon nanotube solution by mechanical stirring and ultrasonication ;

[0037] (3) Mix the two solutions obtained in the above (1) and (2), wherein the concentration of reduced graphene is 0.05 mg / mL, and the concentration of single-walled carbon nanotubes is 0.05 mg / mL, and the solution is stirred and ultrasonically dispersed to obtain Uniformly dispersed reduced graphene-single-walled carbon nanotube mixed solution;

[0038] (4) Put the mixed solution obtained in the above (3) into a polytetrafluoroethylene-lined reaction kettle...

Embodiment 2

[0042] (1) Preparation of graphene oxide solution: at 25°C, measure 20 mL of DMF as a dispersion solvent, weigh 0.1 g of graphene oxide, and obtain a uniformly dispersed graphene oxide solution by mechanical stirring and ultrasonication;

[0043] (2) Preparation of single-walled carbon nanotube solution: at 25°C, measure 20 mL of dispersing solvent DMF / hydroquinone (v / v=1 / 1), weigh 0.2 g of single-walled carbon nanotubes, and Stirring and ultrasonication to obtain a uniformly dispersed single-walled carbon nanotube solution;

[0044] (3) Mix the two solutions obtained in (1) and (2) above, wherein the concentration of graphene oxide is 0.05 mg / mL, and the concentration of single-walled carbon nanotubes is 0.1 mg / mL, and disperse by stirring and ultrasonication. Obtain a uniformly dispersed graphene oxide-single-walled carbon nanotube mixed solution;

[0045] (4) Put the mixed solution obtained in the above (3) into a polytetrafluoroethylene-lined reaction kettle. In the heati...

Embodiment 3

[0049] (1) Preparation of graphene oxide solution: at 25°C, measure 20 mL of dispersing solvent DMF / hydroquinone (v / v=1 / 1), weigh 0.1 g of graphene oxide, stir mechanically and ultrasonically, Obtain a uniformly dispersed graphene oxide solution;

[0050] (2) Preparation of multi-walled carbon nanotube solution: at 25°C, measure 20 mL of dispersing solvent DMF / hydroquinone (v / v=1 / 1), weigh 0.2 g of multi-walled carbon nanotubes, and Stirring and ultrasonication to obtain a uniformly dispersed multi-walled carbon nanotube solution;

[0051] (3) Mix the two solutions obtained in the above (1) and (2), wherein the concentration of graphene oxide is 0.05 mg / mL, and the concentration of multi-walled carbon nanotubes is 0.1 mg / mL. Stir and ultrasonically disperse to obtain Uniformly dispersed graphene oxide-multi-walled carbon nanotube mixed solution;

[0052] (4) Put the mixed solution obtained in the above (3) into a polytetrafluoroethylene-lined reaction kettle. In the heating ...

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Abstract

The invention discloses a film made from a graphene-carbon nanotube composite material and a preparation method of film. The preparation method comprises the following steps: mixing graphene and carbon nanotubes sufficiently and evenly via stirring and ultrasonic dispersion, reacting the graphene with the carbon nanotubes sufficiently via hydrothermal or solvothermal conditions, removing solvents after finishing the reaction to obtain the graphene-carbon nanotube composite materials which are preformed and tangled in a network structure, forming the film on the surfaces of various base materials via coating, spraying, spin-coating and filtering the obtained graphene-carbon nanotube composite materials to obtain the composite film made from the graphene-carbon nanotube composite materials and the base materials, and removing the base materials to obtain the film made from the graphene-carbon nanotube composite materials. According to the method, graphene-carbon nanotube composition is realized simply and effectively and dispersed in the solvents stably, and the two obtained films can be applied in the aspects of heat conduction and heat radiation systems of high calorific value electronic devices, LED (light-emitting diode) lamps and liquid crystal display products.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of nanocomposite materials, and relates to a graphene-carbon nanotube composite film and a preparation method thereof. Background technique [0002] At present, the traditional heat dissipation materials are mostly metals, such as aluminum, copper, stainless steel and so on. Table 1 shows the thermal conductivity of some substances in the standard state. From the table, it can be seen that the metal itself has a high density, a high thermal expansion coefficient, and a low thermal conductivity. It is already difficult to meet the current requirements of light and thin electronic products and high-efficiency heat dissipation. [0003] Table 1 Thermal conductivity table [0004] [0005] Carbon nanocomposites have a wide range of applications, especially in the fields of electrochemical energy storage, catalyst preparation, transparent conductive films, conductive materials, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/14H05K7/20
Inventor 陈西宝陈海力
Owner ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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