Large graphene stripping combined solution

Abstract

The invention discloses a large graphene stripping combined solution, which comprises the following component by weight: 100 parts of water, 30-100 parts of an alcohol solvent, 50-80 parts of polyacrylic ester or polyacrylic ester derivative, 1-30 parts of sheet metal powder, and 0.5-5 parts of a water soluble salt. According to the invention, polyacrylic ester or polyacrylic ester derivative with glue adhesiveness is added into the combined solution, the combined solution can be used in coordination with grinding or stirring so as to reduce the requirement for grinding or stirring speed, and stripping of graphene can be realized without ultra high-speed shearing to a flake graphite layer. Through cooperation with flake zinc powder, a stripping force along the flake direction can be generated to graphite. In addition, the water-soluble salt added into the system can improve the conductivity of the system, superimposition of stripped graphene together again due to static electricity can be avoided, and a stripped disperse state can be maintained.

Description

technical field [0001] The invention relates to the technical field of graphene production, in particular to a combination liquid 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 W...

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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