开关型Pickering乳液体系

Switchable Pickering Emulsion System

Pickering乳液以胶体尺寸的固体粒子代替传统表面活性剂作为稳定剂,具有超稳定,生物相容性好以及对环境友好等优点。开关型Pickering乳液可随pH值、CO2/N2浓度、温度、磁场强度及光强度等条件的变化而改变固体乳化剂的表面润湿性,实现在"乳化"与"破乳"之间的快速转换,在非均相催化、乳液聚合等诸多领域有广泛的应用前景。本文全面总结了近年来开关型Pickering乳液的研究进展及其在界面催化系统、液膜处理有机废水、药物的包封与释放等方面的应用。

Pickering emulsion uses solid particles of colloidal size instead of traditional surfactants as stabilizer,which has the advantages like ultra-stability,biocompatibility,environmental friendliness and so on.Switchable Pickering emulsion is able to change the surface wettability of the solid emulsifier with changes of pH,CO2/N2 concentration,magnetic field,temperature or light intensity.The characteristics of fast conversion between"emulsification"and"demulsification"can meet the demand for transient stability of emulsion in heterogeneous catalysis,emulsion polymerization and so on,so it has a wide application prospect.This paper comprehensively summarizes the research and development of switchable Pickering emulsion in recent years and its application in interface catalytic system,treatment of organic wastewater by liquid membrane,encapsulation and release of drugs,etc.