A kind of highly conductive graphene flexible composite film and preparation method thereof

Abstract

The invention discloses a method for preparing a high-conductivity graphene flexible compound membrane. The method for preparing the high-conductivity graphene flexible compound membrane disclosed by the invention comprises the following steps: 1) treating graphene powder for increasing the conductivity: performing solvent peeling, thermal expansion and high-temperature thermal treatment on the graphene powder, thereby increasing the conductivity; 2) compounding: mixing the graphene powder acquired in the step 1), elastic macromolecular grain and solvent, thereby acquiring a mixture, and then adding thixotropic agent and viscosity modifier for controlling the dynamic viscosity to 6000-8000mpa; 3) forming a membrane: preparing the mixture into the membrane. The invention also discloses the high-conductivity graphene flexible compound membrane prepared according to the method disclosed by the invention.

Description

technical field

[0001] The invention belongs to the technical field of graphene conductive films, in particular to a highly conductive graphene flexible composite film and a preparation method thereof. Background technique

[0002] At present, as a conductive material, graphene products generally have a series of problems such as poor consistency, poor conductivity, and complicated dispersion and compounding process in the polymer material matrix. Therefore, graphene conductive composite materials with ultra-high conductivity are needed.

[0003] Through the continuous preparation of graphene, the optimization of the number of layers, and the dispersion and compounding of graphene, a high-conductivity graphene composite film can be prepared. Compared with the currently known conductive composite materials, the graphene high-conductivity composite film is lighter and thinner, and the electrical resistivity is smaller: its electrical conductivity is 100 times that of ordinary ...