Batch production method of graphene film and graphene film prepared by method

A graphene film, batch technology, applied in the direction of graphene, chemical instruments and methods, layered products, etc., can solve the problems of poor stability, difficulty in graphene oxide self-assembly, high cost, and large energy consumption of graphite oxide. Achieve the effects of reduced baking time, low cost, and strong defoaming ability

Pending Publication Date: 2020-04-10
深瑞墨烯科技(福建)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, the drying of graphite oxide and the high-temperature stripping process consume a lot of energy and cost.
In addition, high-temperature exfoliation will partially reduce the oxygen-containing functional groups in the graphite oxide flakes, making the solution less stable and not easy for the self-assembly of graphene oxide.

Method used

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  • Batch production method of graphene film and graphene film prepared by method
  • Batch production method of graphene film and graphene film prepared by method
  • Batch production method of graphene film and graphene film prepared by method

Examples

Experimental program
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Effect test

Embodiment 1

[0096] The present embodiment provides a batch production method of graphene film, and described batch production method specifically comprises the following steps:

[0097] (1) the graphite oxide filter cake of solid content 45% is preliminarily dispersed in deionized water to obtain graphite oxide solution (such as figure 1 shown), then add a certain amount of ammonia solution to adjust the pH value of the graphite oxide solution to 7.2, and the graphite oxide particle size in the graphite oxide solution is 120 μm;

[0098] (2) the graphite oxide solution in the step (1) is pre-dispersed using a double planetary mixer, and the micrograph of the graphite oxide solution after the pre-dispersion is as follows figure 2 As shown, the graphite oxide flakes are uniformly dispersed in the solvent by means of stirring and shear dispersion, the solid content of graphite oxide in the pre-dispersed graphite oxide solution is 6.4wt%, and the stirring speed of the double planetary mixer ...

Embodiment 2

[0111] The present embodiment provides a batch production method of graphene film, and described batch production method specifically comprises the following steps:

[0112] (1) Preliminarily disperse the graphite oxide filter cake with a solid content of 40% in deionized water to obtain a graphite oxide solution, then add a certain amount of ammonia solution to adjust the pH value of the graphite oxide solution to 6, and the graphite oxide particles in the graphite oxide solution Diameter 80μm;

[0113] (2) The graphite oxide solution in step (1) is pre-dispersed using a double planetary mixer, and the graphite oxide flakes are uniformly dispersed in the solvent by a combination of stirring and shear dispersion, and the graphite oxide solution after the pre-dispersion The solid content of graphite oxide is 4.2wt%, the stirring speed of the double planetary mixer is 40rpm, and the dispersion speed is 1000rpm; the viscosity of graphite oxide solution after predispersion is 2500...

Embodiment 3

[0125] The present embodiment provides a batch production method of graphene film, and described batch production method specifically comprises the following steps:

[0126] (1) Preliminarily disperse the graphite oxide filter cake with a solid content of 42% in deionized water to obtain a graphite oxide solution, then add a certain amount of sodium hydroxide solution to adjust the pH value of the graphite oxide solution to 6.3, the oxidation in the graphite oxide solution Graphite particle size 100μm;

[0127] (2) The graphite oxide solution in step (1) is pre-dispersed using a double planetary mixer, and the graphite oxide flakes are uniformly dispersed in the solvent by a combination of stirring and shear dispersion, and the graphite oxide solution after the pre-dispersion The graphite oxide solid content is 4.5wt%, the stirring speed of the double planetary mixer is 45rpm, and the dispersion speed is 1300rpm; the viscosity of the graphite oxide solution after predispersion...

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Abstract

The invention provides a batch production method of a graphene film and the graphene film prepared by the method. The batch production method comprises the following steps: (I) dispersing and crushinggraphite oxide to obtain a graphene oxide solution; (II) coating a porous grid substrate with the graphene oxide solution, and drying to obtain a graphene oxide film; and (III) sequentially carryingout carbonization and graphitization treatment on the graphene oxide film to obtain the graphene film. The efficient and low-cost high-performance graphene membrane batch preparation method has the advantages that a graphene oxide filter cake is directly subjected to pre-dispersion by a double-planet stirrer and physical dissociation and crushing by a high-pressure homogenizer to obtain the graphene oxide solution, and the obtained solution is good in uniformity, high in solid content and high in operability. Compared with the prior art, the method is simple in process, good in stability, highin continuous degree and low in cost, and the obtained graphene film is good in performance and can meet the market requirements.

Description

technical field [0001] The invention belongs to the technical field of graphene film production, and relates to a batch production method of graphene film and a graphene film prepared by the method, in particular to a high-efficiency and low-cost batch production method of graphene film and the use of The graphene film that this method prepares. Background technique [0002] With the rapid development of the electronics industry, electronic products are increasingly miniaturized, multi-functional and high-performance. At the same time, the heat generated per unit area is also rising sharply. Heat dissipation has become a crucial issue, restricting the development of electronic products, batteries and other Performance and reliability for high power systems. Traditional thermal management materials are aluminum and copper, but their low thermal conductivity cannot meet market demand. At present, graphite film is the mainstream heat dissipation material in the market, and it...

Claims

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Application Information

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IPC IPC(8): C01B32/184B32B9/00B32B9/04B32B27/40
CPCC01B32/184B32B9/007B32B9/045B32B27/40C01P2006/40C01P2006/10
Inventor 王乾龙黄睿之陈淑静唐婕
Owner 深瑞墨烯科技(福建)有限公司
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