Preparation process of graphene thermal conductive film

The common preparation method of graphene thin films is 1. 1 vacuum filtration. As the most commonly used preparation method of graphene thin films at present, the concentration of the system is usually reduced to a certain concentration before filtering the graphene composite dispersion, and then graphene sheets are deposited on microporous filter membranes or other materials for filtration.

The film obtained on the filter membrane is transferred to a substrate such as glass and PET. In the process of suction filtration, water molecules interact with graphene sheets, so that graphene films are uniformly attached to the substrate, and the substrate materials are dissolved by solutions and other substances.

1.2 spraying method, that is, GO dispersion or graphene dispersion is evenly sprayed on the substrate by spraying equipment. ScottGilje et al. sprayed GO dispersion on preheated Si/SiO2 _ 2 substrate in this way, and volatilized the solvent in a certain atmosphere. So as to obtain the required film. Then the film is processed.