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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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  • Summary
  • 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 and solves the problems of large energy consumption, high cost and difficulty in mass production of the existing graphene film preparation method

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

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Embodiment 1

[0019] see figure 1 , this embodiment provides a batch production method of high-performance graphene film, the preparation method is used for batch production of graphene film, and includes the following steps 1 to 5.

[0020] Step 1. First 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 mixed solution with a pH of 6-8.5.

[0021] Wherein, the alkaline solution can be ammonia water, 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 liquid is 4-7 wt%. In this embodiment, by adjusting the pH of the mixed solution, the graphite oxide solid content of the solution can be increased, and the force between graphite oxide sheets in the mixed solution can be enhanced.

[0022] Step 2, performing pre-dispersion, ultra-high pressure homogeneous treatment and ...

Embodiment 2

[0036] This embodiment provides a batch preparation method of a high-performance graphene membrane, which is further refined on the basis of Embodiment 1. In this embodiment, the pH of the mixed liquid in step 1 is adjusted to 7.2, the viscosity of the dispersed graphite oxide mixed liquid in step 2 is 400000 cps, and the solid content after dispersion is 6.4 wt%. The graphene oxide solution is obtained by performing ultrahigh pressure homogenization treatment on the graphite oxide mixed solution through an ultrahigh pressure homogenizer, and the viscosity of the treated graphene oxide solution is about 43000 cps. In step 3, the graphene oxide solution is coated on a 0.4mm porous mesh polypropylene substrate by doctor blade coating to form a 3mm thick graphene oxide solution coating layer, and then baked at a low temperature in the drying tunnel of the coating machine to obtain Graphene oxide film, the temperature distribution of the 8-section drying tunnel is 60°C, 70°C, 80°C...

Embodiment 3

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

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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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