Composite stripping medium for graphene stripping

Abstract

The invention discloses a composite stripping medium for graphene stripping. The stripping medium comprises the following components by weight: 100 parts of water, 30-100 parts of an alcohol solvent, 50-80 parts of polyacrylic ester or polyacrylic ester derivative, 1-10 parts of sheet metal powder, and 0.5-10 parts of rubber powder. According to the invention, polyacrylic ester or polyacrylic ester derivative with glue adhesiveness is added into the stripping medium for graphene stripping, the requirement for grinding or stirring speed can be reduced, and stripping of graphene can be realized without ultra high-speed shearing to a flake graphite layer. The sheet metal powder and rubber powder can generate a stripping force along the flake direction to graphite, and especially high friction coefficient rubber powder is not easy to make graphene broken. Through combined use of the sheet metal powder and rubber powder, the sheet metal powder can conduct and eliminate static electricity on the rubber powder surface, and superimposition of stripped graphene together again due to static electricity can be avoided.

Description

technical field [0001] The invention relates to the technical field of graphene production, in particular to an exfoliation medium for exfoliating graphite into graphene. Background technique [0002] Graphene is a two-dimensional material with good flexibility and electrical properties. What needs to be added is that, strictly speaking, graphene is a single-layer sheet; however, due to the difficulty of preparing single-layer graphene, oligolayer graphene with similar properties is generally also classified into the category of graphene. Inside. [0003] At present, the methods for preparing graphene mainly include: chemical growth method and physical exfoliation method. Compared with the chemical growth method, which is inefficient and not suitable for industrial mass production, the physical exfoliation method mainly uses cheap graphite as a raw material, and applies mechanical force to the graphite crystal to cause the graphite layers to peel off, breaking the van der ...

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Problems solved by technology

However, this kind of chemical substance intercalation process consumes a lot of acid, and there are harmful gases such as SOx and NOx or pollution of heavy metal ions in the production process. There are sulfur residues in the product, and the final graphene is prone to defects, and it is harmful to equipment during application. There is corrosion, which reduces the service life of the equipment and increases the production cost