Field-Induced Breakup of Emulsion Droplets Stabilized by Colloidal Particles

Details Field-Induced Breakup of Emulsion Droplets Stabilized by Colloidal Particles Field-Induced Breakup of Emulsion Droplets Stabilized by Colloidal Particles

2012-03-02

arxiv.org/abs/1203.0410v1

Physical Review E, 85 020403(R), 2012

Physics

Condensed Matter

Soft Condensed Matter

4 pages, plus 3 pages of supplementary material

Scientific paper

10.1103/PhysRevE.85.020403

We simulate the response of a particle-stabilized emulsion droplet in an external force field, such as gravity, acting equally on all $N$ particles. We show that the field strength required for breakup (at fixed initial area fraction) decreases markedly with droplet size, because the forces act cumulatively, not individually, to detach the interfacial particles. The breakup mode involves the collective destabilization of a solidified particle raft occupying the lower part of the droplet, leading to a critical force per particle that scales approximately as $N^{-1/2}$.

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