A kind of stripping agent and application for preparing graphene by mechanical stripping method

Abstract

The invention belongs to the technical field of graphene and particularly relates to a stripping agent for preparation of graphene with a mechanical stripping method as well as an application. The stripping agent comprises components in percentage by weight as follows: 70%-80% of polymerization organic matters, 5%-15% of an organic foaming agent and 10%-20% of a carrier. The components are uniformly mixed in a high-speed stirring machine, the polymerization organic matters and the organic foaming agent are uniformly loaded in the carrier, and the stripping agent and a graphite raw material are mixed to form premix in the preparation process of graphene through mechanical stripping; in the mechanical shearing process, the foaming agent loaded in the inorganic layered carrier is foamed and produces stripping force, so that the gap between graphite layers is enlarged, the polymerization organic matters and the graphite layers perform a non-covalent function, the acting force between the graphite layers is reduced, and the dispersity of the graphene can be improved. The yield of the graphene prepared from the stripping agent is high, the structural defects are small, the preparation time of the graphene prepared through mechanical stripping can be remarkably shortened, and the stripping agent has market application prospect.

Description

technical field [0001] The invention belongs to the technical field of graphene, in particular to a stripping agent used for preparing graphene by a mechanical stripping method and its application. Background technique [0002] Since its discovery in 2004, graphene has been a hot research topic. Graphene is a two-dimensional material with a honeycomb hexagonal planar structure formed by sp2 hybridization of a layer of carbon atoms. Its thickness is only 0.335nm, which is the thinnest material known in the world. Graphene has high mechanical modulus (1.0 TPa), thermal conductivity (5300 W / m·K), specific surface area (2630m 2 / g) and charge mobility (250,000 cm 2 / V•s), as well as strong mechanical strength and flexibility, have broad application prospects in polymer composites, energy materials, electronic communications, optomagnetics, biology and other fields. Due to its potential application prospects in many fields, the basic and applied research of graphene has become...

AI Technical Summary

Problems solved by technology

Using chitosan as a stripping agent can improve the dispersion ability of graphene, but it cannot completely destroy the interaction between graphene sheets, and cannot effectively improve the stripping efficiency of graphene

[0007] In summary, the current mechanical exfoliation to prepare graphene has low exfoliation efficiency and takes a long time, so it is necessary to research and develop a stripping agent that can effectively improve the efficiency of mechanical exfoliation to prepare graphene.