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China Surfactant Detergent & Cosmetics ›› 2021, Vol. 51 ›› Issue (6): 554-563.doi: 10.3969/j.issn.1001-1803.2021.06.013

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Progress on stimulus-responsive Pickering emulsions and their applications

GONG Cheng-yi1(),YU Hao2,WANG Qi-qi2,SUN Ji-yong2(),SONG Ai-xin1()   

  1. 1. Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, Shandong 250100, China
    2. General Tobacco Group Co., Ltd., Jinan, Shandong 250100, China
  • Received:2020-07-13 Revised:2021-05-08 Online:2021-06-22 Published:2021-06-22
  • Contact: Ji-yong SUN,Ai-xin SONG E-mail:738916192@qq.com;sunjy2cn@163.com;songaixin@sdu.edu.cn

Abstract:

Pickering emulsions have many advantages and are particularly well-known for their excellent stability imparted by kinetic factors. However, it is often necessary to temporarily stabilize the system, and then to quickly break the emulsion or change the emulsion type to reach the needs in many application processes. Therefore, the stimuli-responsive Pickering emulsions have received extensive attention. Started with one of the important factors affecting the properties of emulsions, this paper summarized the wettability of particles, as well as the common strategies for bringing responsive behavior to Pickering emulsions. Pickering emulsions that responded to stimuli such as pH, temperature, CO2, light, external force field, oxidation-reduction, ionic strength, and multiple stimuli, were reviewed. The applications of the stimulus-responsive behavior of Pickering emulsions in catalytic reaction, controlled release of substances, high internal phase emulsion preparation, material preparation were briefly introduced. The development directions of stimulus-responsive Pickering emulsions in the future were also prospected.

Key words: Pickering emulsions, stimuli-responsive, wettability, demulsification, phase inversion

CLC Number: 

  • O648.2+3