Mass preparation method of high-performance graphene film, graphene film and antenna

A graphene film, a high-performance technology, applied in the direction of graphene, chemical instruments and methods, antennas, etc., can solve the problems of difficult mass production, high cost, high energy consumption, etc., to overcome the lack of uniformity and reduce the cost of preparation , the effect of high degree of continuity

Inactive Publication Date: 2020-04-24
王雅静
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the existing technical problems, the present invention provides a batch production method of high-performance graphene film an

Method used

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  • Mass preparation method of high-performance graphene film, graphene film and antenna

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Example Embodiment

[0018] Example 1

[0019] See figure 1 This embodiment provides a batch preparation method of a high-performance graphene film. The preparation method is used for batch preparation of graphene films and includes the following steps 1 to 5.

[0020] Step 1. Disperse the graphite oxide filter cake block with a solid content of 40-50% in deionized water, and then add an alkaline solution to form a graphite oxide mixture with a pH of 6-8.5.

[0021] Wherein, the alkaline solution can be ammonia, sodium hydroxide, etc., and the particle size of the graphite oxide in the graphite oxide filter cake is 80-150 μm, and the solid content of the graphite oxide in the mixed solution is 4-7wt%. In this embodiment, by adjusting the pH of the mixed solution, the solid content of graphite oxide in the solution can be increased, and the force between layers of graphite oxide flakes in the mixed solution can be enhanced.

[0022] Step 2: Perform pre-dispersion, ultra-high pressure homogenization treatm...

Example Embodiment

[0035] Example 2

[0036] This embodiment provides a batch preparation method of high-performance graphene film, which is further refined on the basis of Embodiment 1. In this embodiment, the pH of the mixed solution in step 1 is adjusted to 7.2, the viscosity of the dispersed graphite oxide mixed solution in step 2 is 400,000 cps, and the solid content after dispersion is 6.4 wt%. The graphene oxide solution is obtained by ultra-high pressure homogenization treatment of the graphite oxide mixture by an ultra-high pressure homogenizer. The viscosity of the graphene oxide solution after the treatment is about 43000 cps. In step 3, the graphene oxide solution is coated on a 0.4mm porous mesh polypropylene substrate by a knife coating method to form a 3mm thick graphene oxide solution coating layer, and then the coating layer is baked at a low temperature through the coating machine. Graphene oxide film, the temperature distribution of 8 drying tunnels is 60℃, 70℃, 80℃, 75℃, 75℃, 7...

Example Embodiment

[0038] Example 3

[0039] This embodiment provides a high-performance graphene film, which is prepared by the batch preparation method of the high-performance graphene film of Example 1 or Example 2. The high-performance graphene film of this embodiment has good uniformity, and the flatness and physical properties are greatly improved compared with the existing graphene film. In addition, the cost of preparation is lower, the efficiency and quality are higher, and the preparation can be carried out in large quantities to achieve large-scale mass production, which can meet actual market demands.

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Abstract

The invention discloses a mass preparation method of a high-performance graphene film. The method comprises the following steps: dispersing a graphite oxide filter cake in deionized water, adding an alkaline solution to adjust the pH value; sequentially carrying out stirring, high-pressure physical dissociation crushing, defoaming and high-temperature reduction on the mixed solution; coating the defoamed solution on a substrate to form a graphene oxide film, baking the graphene oxide film to obtain a graphene oxide membrane; stripping and rolling the graphene oxide membrane, cutting the graphene oxide membrane in sections; carrying out interval lamination to form a graphene oxide membrane stacked layer, carrying out vacuum baking to primarily reduce the graphene oxide membrane stacked layer; carbonizing and graphitizing the primarily reduced graphene oxide membranes to obtain graphene membranes; laminating the graphitized graphene membranes, and transferring the laminated graphitized graphene membranes to a polymer substrate to form a coiled graphene film. According to the method, the coating efficiency can be improved, the continuous degree is high, and mass preparation of the graphene film can be realized. In addition, the invention also provides a graphene film and an antenna.

Description

technical field [0001] The invention relates to a preparation method of a graphene film in the technical field of material preparation, in particular to a batch preparation method of a high-performance graphene film, and also relates to a high-performance graphene film prepared by the preparation method and a high-performance graphite film using the high-performance graphene film. Antennas made of alkenes. Background technique [0002] Graphene, as an emerging carbon material, has been widely used in the development of high-performance thermal conductive materials and functional filling materials due to its unique electrical, thermal and physical-mechanical properties. Among them, the conductive ink prepared with graphene as a functional filling material has been tried to be applied in the field of radio frequency identification technology RFID to replace the metal thin film RFID antenna prepared by the traditional etching method. However, due to the low conductivity of gra...

Claims

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Application Information

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IPC IPC(8): B32B9/00B32B9/04B32B27/36B32B27/40B32B27/06B32B7/08B32B33/00B32B37/10C01B32/184H01Q1/36
CPCB32B7/08B32B9/007B32B9/045B32B27/36B32B27/40B32B33/00B32B37/10B32B2307/202B32B2307/302C01B32/184H01Q1/368
Inventor 王雅静
Owner 王雅静
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