Abstract: Montmorillonite is widely concerned because of its low price and rich resources as the constituent of bentonite. Montmorillonite is a typical 2∶1 layered silicate mineral. It has good characteristics such as cation exchangeability, strong adsorption, hydrophilic expansion and. Howe-ver, exfoliated montmorillonite has been paid more attention because of its remarkable improvement in physical, chemical, electrical, catalytic and mechanical properties. The montmorillonite layers are connected by van der Waals forces and electrostatic forces. The process of exfoliation is a process in which the interlaminar forces is gradually reduced or even eliminated. At present, the main exfoliating methods of montmorillonite can be divided into physical exfoliating method, chemical exfoliating method and physical-chemical exfoliating method according to different exfo-liated forms. The research focuses on two aspects. On the one hand, it has become a research issues to find an efficient physical method which is destroy the aspect ratio. At present, the physical exfoliating method destroys the nanosheets through mechanical forces. The direction of mechanical force is disordered, and the sheet layer is destroyed when it is successfully exfoliated. Due to the simple operation and low cost of physical exfoliating method, it has become a new research hotspot to find an efficient and non-destructive physical exfoliating method. On the other hand, the effective combination of physical method and chemical method has become a research hotspot. Physical exfoliation method has simple operation and low cost, but it can not guarantee the integrity of the nanosheets; chemical exfoliating method has significant effect, but the large number of organic reagents in the process is a contradiction of the principle of environmental friendliness. Making full use of the advantages and combining the two methods effectively can achieve better stripping effect. In this paper, the research progress of montmorillonite exfoliating met-hods in recent years is reviewed, and the research hotspot and trend of montmorillonite exfoliating methods are analyzed and prospected.
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