Research progress on the cyclodextrin-based thin film composite membranes
Cyclodextrin(CD),a green material,has been widely used in the construction of water treatment separation membranes because of its unique cavity structure and amphiphilicity of hydrophilic outer cavity and hydrophobic interior cavity.CD membrane has excellent physical and chemical properties and structural characteristics,and it is widely used in water treatment fields such as wastewater purification,dye/salt mixed solution separation and organic solvent nanofiltration.In water treatment,CD membrane can achieve the precise separation of molecules and ions at the same time and improve the permeability of the membrane.In this paper,based on the different design and preparation methods of CD membrane(interfacial polymerization and phase transformation)and the different construction methods of CD membrane,the research process of CD thin film composite membrane for water treatment in recent years was reviewed and the influences of the introduction of CD on the interface structure,permeability and antifouling property were discussed.Finally,the development direction and trend of CD membrane in the structure regulation and selection of permeability improvement was analyzed and prospected,such as improving the reactivity of CD,optimizing the reaction conditions,developing new CD derivatives and the preparation process of new CD membrane,so as to promote the application and development of CD thin film composite membrane in water treatment.
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