Graphene coating as well as preparation method and coating method thereof

Abstract

The invention belongs to the technical field of materials and in particular relates to a graphene coating as well as a preparation method and a coating method thereof. The graphene coating is prepared from the components by weight: 5-95wt percent of less layer of grapheme, 5-95wt percent of adhesive, 0.01-50wt percent of dispersant and surfactant, 0.01-10wt percent of defoamer and the balance of solvent. With the adoption of the graphene coating, the thickness of an electricity and heat conductive coating can be controlled to be 100nm-20 microns; when the graphene coating is used on a plastic matrix, the volume resistivity can reach a range from 10<-2>ohm.cm to 10<-4>ohm.cm; while the graphene coating is used on a metal matrix, the volume resistivity can reach 10<-6>ohm.cm. The graphene coating can be applied to the metal surface so as to improve the cohesiveness, the electricity/heat conduction performance and the corrosion and oxidation resistance. When the graphene coating is coated on the plastic surface, the frictional resistance, the electricity and heat conduction performances and the static resistance can be lowered, and the graphene coating can be applied to the fields of printed circuits, electronic devices, radio frequency devices, touch screens, thin film solar energy, LEDs, magnetic shielding, radio frequency shielding and the like.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a few-layer graphene coating, a preparation method and an application method thereof. Background technique [0002] The contact surface of the same or dissimilar metals usually has a large contact resistance due to the formation of an oxide film on the surface. Plastics tend to accumulate charges due to their insulating properties. [0003] By coating a conductive coating with good stability on the metal surface, the contact resistance can be reduced; a conductive film is usually coated on the plastic surface, including conductive silver glue to dissipate heat and prevent static electricity accumulation. [0004] In the traditional conductive coating, the conductive process is realized by providing free electrons through the doped conductive particles, such as graphite, carbon black, metal, etc.; ordinary conductive carbon black, the conductivity is not good enough...

AI Technical Summary

Problems solved by technology

[0004] In the traditional conductive coating, the conductive process is realized by providing free electrons through the doped conductive particles, such as graphite, carbon black, metal, etc.; ordinary conductive carbon black, the conductivity is not good enough, the coating is thick and brittle, and the coating adhesion Poor, poor oil resistance, darker color; coatings made of metal particles or metal-coated polymer particles are too expensive, easy to oxidize, easy to layer, and inconvenient for construction