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    Double emulsion in a compound droplet

    Year: 2010

    Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Volume 365, Issues 1-3, 5 August 2010, Pages 178-180, 20111221

    Authors: D. Terwagne a,* , T. Gilet b , N. Vandewalle a , S. Dorbolo a

    Organizations: a GRASP, Physics Department B5a, University of Liège, Allée du Six Aout 17, B-4000 Liège, Belgium, b Department of Mathematics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA

    A compound drop is made of a millimetric water drop encapsulated in an oil shell. They are obtained by merging one drop of each component (water and oil). Afterwards, they are laid on a high viscosity oil bath which is vertically vibrated. When the forcing acceleration is higher than a given threshold Γth, compound drops can bounce on the surface. We show that above a second threshold Γe > Γth some oil contained in the shell enters in the inner water droplet forming a stable double emulsion.