Pickering emulsions stabilized by the complex of polystyrene particles and chitosan
2015
Zhang, Shumin | Zhou, Yinghao | Yang, Cheng
Herein, we present a systematic investigation of oil-in-water Pickering emulsions stabilized by the complex of polystyrene (PS) particles and chitosan (CS). The presence of both PS particles and CS resulted in a stable emulsion, in contrary to those prepared with PS particles or CS alone, and the adsorption of PS particles and CS on oil droplet surface was observed using SEM and fluorescence microscopy. In addition, the mechanism of the emulsifying ability of the complex has been studied by determining the wettability of PS particles modified by CS, as well as the flocculation of PS particles. Specifically, at the low concentration of CS, the emulsion was stabilized by the flocculated PS particles induced by the adsorption of CS molecules, whereas at the high concentration of CS, the emulsion was stabilized mainly by free CS.
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