Gravity-induced encapsulation of liquids by destabilization of granular rafts

Manouk Abkarian (), Suzie Protière, Jeffrey M. Aristoff and Howard A. Stone ()
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Manouk Abkarian: Université Montpellier 2—CNRS, Laboratoire Charles Coulomb
Suzie Protière: CNRS, Université Paris 06, Institut Jean le Rond d’Alembert
Jeffrey M. Aristoff: Princeton University
Howard A. Stone: Princeton University

Nature Communications, 2013, vol. 4, issue 1, 1-8

Abstract: Abstract Droplets and bubbles coated by a protective armour of particles find numerous applications in encapsulation, stabilization of emulsions and foams, and flotation techniques. Here we study the role of a body force, such as in flotation, as a means of continuous encapsulation by particles. We use dense particles, which self-assemble into rafts, at oil–water interfaces. We show that these rafts can be spontaneously or controllably destabilized into armoured oil-in-water droplets, which highlights a possible role for common granular materials in environmental remediation. We further present a method for continuous production and discuss the generalization of our approach towards colloidal scales.

Date: 2013
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DOI: 10.1038/ncomms2869

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