Aging mechanism in model Pickering emulsion

作者：Fouilloux Sarah; Malloggi Florent; Daillant Jean; Thill Antoine^*

来源：Soft Matter, 2016, 12(3): 900-904.

DOI：10.1039/c5sm02134k

We study the stability of a model Pickering emulsion system using fluorinated oil and functionalized silica nanoparticles. A special counter-flow microfluidic set-up was used to prepare monodisperse oil droplets in water. The wettability of the monodisperse silica nanoparticles (NPs) could be tuned by surface grafting and the surface coverage of the droplets was controlled using the microfluidic setup. For surface coverage as low as 23%, we observed a regime of Pickering emulsion stability where the surface coverage of emulsion droplets of constant size increases with time, coexisting with an excess of oil phase. Our results demonstrate that the previously observed limited coalescence regime where surface coverage tends to control the average size of the final droplets must be put in a broader perspective.

• 出版日期2016
• 单位中国地震局