A kind of preparation method of graphene composite material

Abstract

The invention provides a method for preparing a graphene composite material. The method comprises the following steps: firstly, mixing graphite oxide with condensed diethylene glycol so as to obtain a graphite oxide diethylene glycol dispersion; putting a diethylene glycol solution with zinc acetate into a container, dropping the graphite oxide diethylene glycol dispersion into the diethylene glycol solution with zinc acetate, dropping hydrochloric acid and distilled water dropwise, continuously stirring to implement a reaction so as to obtain sol, leaving to stand to obtain gel, aging for days, washing, drying, and grinding so as to obtain a graphene material; heating the graphene material in the presence of hydrogen and argon so as to remove mechanical damage; further cooling, vacuuming, and removing oxides on the surface; finally introducing argon, heating to certain temperature, further cooling, and taking out, thereby obtaining the graphene composite material. A graphite heat radiation fin made of the graphene composite material prepared by using the method is capable of effectively transferring heat and improving heat radiation performance, can be also used as a flexible surface heat radiation body material, and can meet heat radiation requirements of high-power and high-integration systems of different fields.

Description

technical field [0001] The invention belongs to the field of new materials, relates to a graphene composite material, in particular to a preparation method of a graphene composite material. Background technique [0002] Graphene is the thinnest material known so far; and it is not only light and thin, but also very strong and soft; graphene has high mechanical strength, good thermal conductivity and fast carrier mobility; graphene In recent years, as a new type of material, composite materials have been valued and applied by more and more people. [0003] There are many methods for the preparation of graphene composite materials, and this field has become a hot spot that scholars from all over the world have paid attention to, especially graphene composite materials have become the "star" of today's new materials. [0004] Graphene is a hexagonal honeycomb lattice planar film with a thickness of only one carbon atom. For "super material". Graphene has a wide range of uses...

AI Technical Summary

Problems solved by technology

At the same time, my country's graphene industry is still facing problems such as weak technology transformation capabilities and narrow commercial application fields.