Abstract
Janus emulsions are prepared by one-step vibrational mixing of two immiscible oils, silicone oil, SO, with density of 0.964 g/cm3 and sunflower oil saturated with dimethyl phthalate, VO (DMP), with density of 0.991 g/cm3, and an aqueous solution of sodium dodecyl sulfate as continuous phase. The destabilization of Janus emulsion is followed by the change of layer dimension as well as the microscope image, illustrating the two main aspects of creaming and coalescence. The fundamental impasse of the final separation of the Janus drop oils against unfavorable free energy change is resolved by a numerical analysis on a model emulsion with realistic interfacial tension values to show a thermodynamically favored path to the final destabilization process.
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