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Title: Water in oil emulsions from hydrophobized metal membranes and characterization of dynamic interfacial tension in membrane emulsification
Authors: Silva, Pedro S.
Morelli, Serena
Dragosavac, Marijana M.
Starov, Victor
Holdich, R.G.
Keywords: Liquid drops
Surfactant dynamics
Membrane surface
Hydrophobic
Water in oil emulsion
Dynamic interfacial tension
Issue Date: 2017
Publisher: © Elsevier
Citation: SILVA, P.S., 2017. Water in oil emulsions from hydrophobized metal membranes and characterization of dynamic interfacial tension in membrane emulsification. Colloids and Surfaces A: Physicochemical and Engineering Aspects, doi:10.1016/j.colsurfa.2017.06.051.
Abstract: Hydrophobization of metal surfaces is reported based on silanization reactions. The aim was its application to metal porous membranes for the production of water in oil emulsions using a process known as membrane emulsification. A vertical oscillating membrane system was used to carry out drop formation experiments. It is shown that drop size can be tuned between 35 and 85. μm by changing just the surfactant concentration in the continuous phase. In addition, a method to determine the percentage of active pores during the membrane emulsification process is demonstrated. This method links knowledge acquired in the surfactant adsorption dynamics and drop expansion rate. Using this approach, pore velocity can be determined, which will help in determining the boundary between dripping and jetting from a pore. This study reinforces the importance of dynamic interfacial tension which must be considered in process design, and modelling purposes, particularly in two liquid phase systems using membranes such as membrane emulsification.
Description: This paper is closed access until 20th June 2018.
Sponsor: This work was supported by Micropore Technologies Ltd and prepared in the framework of the Marie Curie Initial Training Network “Complex Wetting Phenomena” (CoWet), grant no. 607861.
Version: Accepted for publication
DOI: 10.1016/j.colsurfa.2017.06.051
URI: https://dspace.lboro.ac.uk/2134/26028
Publisher Link: http://dx.doi.org/10.1016/j.colsurfa.2017.06.051
ISSN: 0927-7757
Appears in Collections:Closed Access (Chemical Engineering)

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