The preparation of graphene by ball milling and peeling requires 1-3 mm grinding medium, and the dispersion medium is water or dimethylformamide, preferably planetary ball mill. The product after grinding can be graphene slurry or dried to prepare graphene powder. Graphene prepared by ball milling and stripping can be applied to large-scale production of graphene. Graphene has low cost and wide adaptability, and is suitable for concrete reinforcement, anti-corrosion coatings, lubricants, conductive coatings, heat dissipation coatings and so on.
The equipment for preparing graphene by ball milling has low cost, generally within five digits, simple production, high efficiency and large capacity, and is suitable for large-scale production. Graphene monolayer prepared by ball milling contains less graphene, generally above 10 layer, and its performance is poor, generally it is graphene microchip.
Main applications
Graphene is of special significance to the basic research of physics, which enables some quantum effects that can only be demonstrated in theory to be verified by experiments. The semiconductor with zero energy gap is mainly single-layer graphene, and this electronic structure will seriously affect the role of gas molecules on its surface. The results of hydrogenation and oxidation of graphene show that single-layer graphene has the function of enhancing the surface reactivity compared with bulk graphite, indicating that the electronic structure of graphene can regulate its surface reactivity.
Graphene can be made into chemical sensors, and this process is mainly completed through the surface adsorption performance of graphene. According to the research of some scholars, the sensitivity of graphene chemical detector can be comparable to the limit of single molecule detection. Graphene can be used to make transistors. Because of the high stability of graphene structure, this transistor can still work stably on the scale close to a single atom.