Surfactant-assisted spreading of an oil-in-water emulsion on the surface of a liquid bath
Roche, Matthieu · Li, Zhenzhen · Griffiths, Ian · Saint-Jalmes, Arnaud · Stone, Howard A.
الأصل · EN
This fluid dynamics video shows how an oil-in-water emulsion stabilized by an ionic surfactant spreads on the free surface of a layer of pure water. The spreading shows two intriguing features: a transparent area surrounding the source of oil droplets, and a fast retraction of the layer of oil droplets on itself once the source has emptied. We show that the dynamics of spreading are strongly connected to the interfacial/bulk properties of the surfactant.
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