Method for producing bulky graphene

Abstract

The invention discloses a method for producing bulky grapheme. The method comprises the following steps: S1) injecting graphite flakes and a stripper in a ball milling jar, wherein the stripper comprises the following components: 100 parts of water, 30-100 parts of an alcohols solvent, 50-80 parts of a polyacrylate or polyacrylate derivative, 1-30 parts of flaky metal powder, and 0.5-5 parts of water-soluble salt; S2) performing ball milling on the components for 4-48 hours, wherein a rotating speed of a bowl mill is more than 2000 rpm / min; S3) stopping a reaction and discharging a fluid suspension for standing; S4) conveying the graphene fluid suspension to a centrifuge for centrifugation, after centrifugation, an upper level clear liquid is taken for vacuum-filtering to obtain a filter cake; and S5) washing the filter cake, performing freeze drying on the filter cake. The method is capable of stripping bulky graphene with high efficiency.

Description

technical field [0001] The invention relates to the technical field of graphene production, in particular to a physical exfoliation production method of large sheets of 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 ...

AI Technical Summary

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