Drying of Complex Suspensions
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AbstractWe investigate the 3D structure and drying dynamics of complex mixtures of emulsion droplets and colloidal particles, using confocal microscopy. Air invades and rapidly collapses large emulsion droplets, forcing their contents into the surrounding porous particle pack at a rate proportional to the square of the droplet radius. By contrast, small droplets do not collapse, but remain intact and are merely deformed. A simple model coupling the Laplace pressure to Darcy's law correctly estimates both the threshold radius separating these two behaviors, and the rate of large-droplet evacuation. Finally, we use these systems to make novel hierarchical structures.
All Author(s) ListXu L, Berges A, Lu PJ, Studart AR, Schofield AB, Oki H, Davies S, Weitz DA
Journal namePhysical Review Letters
Year2010
Month3
Day26
Volume Number104
Issue Number12
PublisherAmerican Physical Society
ISSN0031-9007
eISSN1079-7114
LanguagesEnglish-United Kingdom
Web of Science Subject CategoriesPhysics; Physics, Multidisciplinary; PHYSICS, MULTIDISCIPLINARY

Last updated on 2021-14-01 at 23:13