Equipment and method for preparing graphene film through laser grading carbonization of polyimide film

Abstract

The equipment is characterized in that electric appliance bodies are fixedly connected to the inner walls of the front face and the back face of a preparation box of the equipment, a square groove is formed in the top of the preparation box, openings are formed in the top and the bottom of the square groove, and a precise rolling conveying mechanism is fixedly connected to the interior of the preparation box; the precise rolling conveying mechanisms are arranged on the left side and the right side of the electric appliance body, a laser mechanism for heating, carbonizing and graphitizing is fixedly connected into the preparation box, each precise rolling conveying mechanism comprises a discharging roller, and the discharging rollers are rotationally connected to the inner walls of the front face and the back face of the preparation box and arranged on the left side of the electric appliance body. Through laser power selection and laser action time control, polyimide film damage occurring in the laser carbonization process is reduced, and in addition, the patterned graphene heat conduction film can be customized by adjusting the laser path according to customer requirements.

Description

technical field [0001] The invention relates to the technical field of graphene film equipment, in particular to a device and method for preparing graphene film by laser graded carbonization of polyimide film. Background technique [0002] With the rapid development of electronic technology, miniaturized and lightweight smart products put forward higher requirements for heat dissipation. Carbon materials have attracted extensive attention of researchers due to their light weight and high thermal conductivity, that is, carbon material films can effectively increase the heat dissipation area of ​​electronic devices, improve the thermal conductivity of devices, and transfer heat from electronic devices. Graphene is the material with the highest thermal conductivity among the known materials, and the theoretical thermal conductivity can be as high as 5300w / mk. At present, graphene films with high thermal conductivity are usually formed by graphene oxide, which is then thermally...

AI Technical Summary

Problems solved by technology

[0003] The main problems of this technology are laser power selection and laser action time control. If the laser intensity is too high, the polyimide film will be damaged.

In addition, the thickness of the polyimide film also needs to be controlled. If the thickness is too large, it will cause insufficient laser sintering and only carbonize the surface layer. If the film thickness is too small, it will cause problems such as laser burning.

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