Abstract
Graphene is a honeycomb hexagonal 2D crystal nanomaterial with a thickness of only 0.334 nm. It has been widely used and studied because of its ultra-thin 2D nano-characteristics and excellent electrical, thermal, optical and mechanical properties. With the continuous in-depth study of graphene, the liquid phase dispersion of graphene has also achieved breakthroughs. This review summarises the research progress of the liquid phase exfoliation mechanism, exfoliation method, stable dispersion mechanism and dispersion method of graphene in recent years. The research situations of Hamaker constant theory in exfoliation mechanism and Hansen solubility coefficient theory in stable dispersion mechanism are mainly discussed. The shortcomings of the research are summarised, and analyses the graphene liquid phase dispersed in the important challenge in the future. The stable dispersion method of graphene is also summarised. In the future, the π-π interaction is the most potential method for studying graphene stabilization.
Highlights
Materials are the basis and forerunner for the development of human society (Du, 2007; Wegst et al, 2015), and the birth of new materials is an important milestone of social progress
The two theories reveal the essence of graphene liquid-phase exfoliation and stable dispersion from the intermolecular force and the interfacial force between solute and solvent, respectively
It is one of the important approaches to solve the problem of graphene agglomeration and realize the uniform and stable dispersion of graphene liquid phase
Summary
Research Progress of the Liquid-Phase Exfoliation and Stable Dispersion Mechanism and Method of Graphene. Graphene is a honeycomb hexagonal two-dimensional (2D) crystal nanomaterial with a thickness of only 0.334 nm. It has been widely used and studied because of its ultra-thin 2D nano-characteristics and excellent electrical, thermal, optical, and mechanical properties. This review summarizes the research progress of the liquid-phase exfoliation mechanism, exfoliation method, stable dispersion mechanism, and dispersion method of graphene in recent years. The shortcomings of the research are summarized and analyzes the graphene liquid phase dispersed in the important challenge in the future. The stable dispersion method of graphene is summarized. The π-π interaction will be the most potential method for studying graphene stabilization
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