Graphene film rolled materials and preparation method thereof

Abstract

The invention discloses a preparation method of graphene film rolled materials. The preparation method comprises the following steps: preparing a graphene oxide solution; coating the solution onto a PI (polyimide) film, and drying to obtain the graphene film base materials; performing high-temperature carbonization and graphitization on the graphene film base materials, and calendering the graphene film by adopting a calendering machine to obtain a rolled graphene heat dissipation film. An innovative operation way comprises the special following steps: slicing the rolled graphene film base materials into the required specifications so as to obtain the graphene film base materials with various specifications and ensure that the graphene film base materials are in a rolled shape; then putting the rolled graphene film base materials in a common double-layer jig; putting the jig into a sintering furnace, and setting a required temperature curve according to products with different thicknesses; performing high-temperature carbonization, graphitization and temperature reduction on the products; taking the graphitized graphene film base material products out, and calendering the productsby using the calendering machine to obtain the rolled graphite heat dissipation film. The method has the advantages of simple process and easiness for popularization, and moreover, the graphene film has the excellent shielding effect and extremely strong heat dissipation performance.

Description

technical field [0001] The invention relates to a graphene film roll material and a preparation method thereof. The produced product belongs to the technical field of nanomaterial graphene polymer material carbonization products, and is mainly used as heat dissipation and shielding materials in the electronics industry. Particularly refer to a kind of graphene thin film rolling material preparation method, the present invention also relates to a kind of graphene thin film. technical background [0002] With the expansion and popularization of electronic and electrical equipment applications, the performance and structure requirements of electronic equipment are becoming more and more stringent, including higher processing speed, higher processing frequency, smaller volume, lighter weight, and more high power. The upgrading of electronic equipment brings great convenience and excellent experience to people's life, but also brings some problems: (1) more heat generation; (2) ...

AI Technical Summary

Problems solved by technology

The upgrading of electronic equipment brings great convenience and excellent experience to people's life, but also brings some problems: (1) more heat generation; (2) more serious electromagnetic wave pollution

At present, domestic and international heat dissipation products mainly use artificial graphite, natural graphite and metal materials for heat dissipation. This product is mainly used to replace artificial graphite, which is a high thermal conductivity material. Artificial graphite coil is one of the main products in the current market. The limitation of production capacity has led to a shortage of domestic product supply chains, and there is often a lack of raw materials. However, graphene products have accumulated over the years and many companies have bottlenecks in production and market applications.

Images