Water transport by osmosis through a high-internal-phase, water-in-oil emulsion

DeIuliis, Gabrielle; Sahasrabudhe, Girija; Davis, Robert H.; Galvin, Kevin P.

Title: Water transport by osmosis through a high-internal-phase, water-in-oil emulsion
Creator: DeIuliis, Gabrielle; Sahasrabudhe, Girija; Davis, Robert H.; Galvin, Kevin P.
Relation: ARC.DP180101617 http://purl.org/au-research/grants/arc/DP180101617
Relation: Chemical Engineering Science Vol. 232, Issue 15 March 2021, no. 116348
Publisher Link: http://dx.doi.org/10.1016/j.ces.2020.116348
Publisher: Elsevier
Resource Type: journal article
Date: 2021
Description: Agglomeration of ultrafine hydrophobic particles can be performed using high-internal-phase (HIP), water-in-oil emulsions as the binder. The ultrafast particle recovery achieved using these emulsions can be attributed to the presence of thin, permeable oil films as its organic phase. The internal aqueous phase of these emulsions contains salt, which drives water absorption through these permeable oil films during agglomeration, greatly reducing the effects of the lubrication resistance to particle collision, adhesion and hence agglomeration. In this study, the water permeation was quantified by studying the growth of cylindrical rivulets placed in fresh water. The rivulet diameter increased approximately with the square root of time, suggesting a diffusion-limited process. Water transport rates increased about three fold with increasing internal salt concentration of the emulsion from 0.5 wt% to 10 wt%.
Subject: high-internal-phase water-in-oil emulsion; kinetics of water transport; micelles; permeable organic films; diffusion; osmosis
Identifier: http://hdl.handle.net/1959.13/1421602
Identifier: uon:37749
Identifier: ISSN:0009-2509
Language: eng
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