Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session M07: Microscale Flows: Emulsions
8:00 AM–9:57 AM,
Tuesday, November 20, 2018
Georgia World Congress Center
Room: B212
Chair: Myeongsub Kim, Florida Atlantic University
Abstract ID: BAPS.2018.DFD.M07.4
Abstract: M07.00004 : Synthesizing Pickering Nanoemulsions via condensation on oils
8:39 AM–8:52 AM
Presenter:
Hassan Bararnia
(University of Illinois at Chicago)
Authors:
Hassan Bararnia
(University of Illinois at Chicago)
Dongjin Kang
(University of Illinois at Chicago)
Sushant Anand
(University of Illinois at Chicago)
In this work a novel method is presented to synthesize Pickering emulsions. Unlike the typical two-step techniques which are widely being used to make emulsions herein we propose a single process which leads to small size (Micro-Nano) water droplets dispersion in oil phase possessing hydrophobic silica nanoparticles . The predominant advantage stems from the heterogenous nucleation of water vapor nuclei on the sub-cooled oil-air interface associated with spontaneously submergence within the oil. The positive spreading coefficient of oil prevents droplet growth induced by vapor diffusion via cloaking, while irreversible particle adsorption suppresses the merging event occurring between the adjacent droplets. We discuss how particles properties such as hydrophobicity, size, concentration as well as condensation time affect the emulsion size. The competition between particle adsorption rate, condensation rate can be finely adjusted using above-mentioned parameters to obtain stable nano-emulsions at even low nanoparticle loadings. We discuss the energetics of emulsion formation by condensation, and show the vapor-condensation process can be easily scaled to produce larger quantities of emulsions in energy-efficient manner.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.M07.4
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