Recent progress in nanoclay-based Pickering emulsion and applications

Recently, clay minerals and nanoclay-based particles have attracted increasing interests in the preparation of Pickering emulsion owning to their cheap, abundant, natural, nontoxic and biocompatible properties. However, information regarding nanoclay-based Pickering emulsion has not been systematically or comprehensively reported. Herein, this review summarizes the latest advancement in various nanoclays stabilized Pickering emulsions, influential factors of stability and their physicochemical properties, and provides a comprehensive overview of ones for catalytic system, oil spill remediation, encapsulation for active compounds and preparation of functional porous materials applications. In order to boost further research of nanoclay-based Pickering emulsion for practical used in numerous applications, the outlook of existing challenges and opportunities for future development is also presented.