A kind of preparation method of graphene

Abstract

The invention provides a preparation method of graphene. The graphene is prepared by the following method: adding explosive and a surfactant into a carbon source; mechanically and rapidly dispersing to obtain an explosive dispersing solution; then spraying the explosive dispersing solution into a sealed reactor from a sprayer under the action of oxidizing gas; initiating explosion through energy to prepare the graphene. The method provided by the invention has the advantages of high purity, good performance, low layer number, large area, high generation efficiency and capability of realizing large-scale mass production, and the graphene can be widely applied to fields including super-capacitors, batteries, electromagnetic shielding, static electricity resistance and the like.

Description

technical field [0001] The invention relates to the field of graphene, in particular to a method for preparing graphene. Background technique [0002] Graphene is a honeycomb planar film formed by sp2 hybridization of carbon atoms. It is a quasi-two-dimensional material with only one atomic layer thickness, so it is also called monoatomic layer graphite. Because graphene has very good strength, flexibility, electrical conductivity, thermal conductivity, and optical properties, it has been greatly developed in the fields of physics, materials science, electronic information, computers, and aerospace. At present, the common powder generation methods of graphene are mechanical exfoliation method, redox method, and SiC epitaxial growth method. The graphene produced by thin film production method and chemical vapor deposition method is of high quality, but none of them can achieve high-efficiency mass production. , and it is difficult to guarantee the purity of graphene. In ord...

AI Technical Summary

Problems solved by technology

At present, the common powder generation methods of graphene are mechanical exfoliation method, redox method, and SiC epitaxial growth method. The graphene produced by thin film production method and chemical vapor deposition method is of high quality, but none of them can achieve high-efficiency mass production. , and it is difficult to guarantee the purity of graphene

In order to solve this problem, Chinese patent 201210160242.8 mixes explosive substances with expanded graphite and then treats them at high temperature in a sealed reactor to obtain graphene. This preparation method does not have reducing substances or reducing atmospheres, so the resulting graphene is not high in purity, mostly Graphene oxide, and this method cannot produce continuously

Chinese patent CN107032338A disperses graphite powder in liquid paraffin, and then sprays it between the electrodes through high-pressure spray, so that it can be cracked to form graphene in a large current. This patent has the following shortcomings: ① In view of the fact that the current cannot generate a huge mechanical force, It is difficult to peel off the graphite powder generated by electric current cracking to obtain graphene; ②paraffin wax is not explosive, and it is difficult to generate graphene in large quantities by relying solely on cracking, resulting in extremely low yield, poor purity and low quality of graphene