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Title: Membrane emulsification: Formation of water in oil emulsions using a hydrophilic membrane
Authors: Silva, Pedro S.
Starov, Victor
Holdich, R.G.
Keywords: Membrane surface
Water in oil emulsion
Polyvinyl alcohol (PVA)
Droplets and contact angle
Issue Date: 2017
Publisher: © Elsevier
Citation: SILVA, P.S., STAROV, V. and HOLDICH, R.G., 2017. Membrane emulsification: Formation of water in oil emulsions using a hydrophilic membrane. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 532, pp. 297-304.
Abstract: It is shown that formation of water based droplets in an immiscible (i.e. oil) continuous phase can be achieved using a hydrophilic porous metal membrane without prior hydrophobic treatment of the membrane surface. This avoids the need for "health and safety approval" of typical hydrophobic treatments for the membrane, which often use chemicals incompatible with pharma or food applications. To investigate this, wetting experiments were carried out: sessile droplets were used to determine static contact angles and a rotating drum system was used to determine contact angles under dynamic conditions. In the latter case the three-phase contact line was observed between the rotating drum, water and the continuous phase used in the emulsification process; a surfactant was present in the continuous phase which, in this process, has a double function: to assist the wetting of the membrane by the continuous phase, and not the disperse phase, and to stabilize the droplets formed at the surface of the porous membrane during membrane emulsification.
Description: This paper was published in the journal Colloids and Surfaces A: Physicochemical and Engineering Aspects and the definitive published version is available at http://dx.doi.org/10.1016/j.colsurfa.2017.04.077.
Sponsor: This work was supported by Micropore Technologies Ltd. and funded by a Marie Curie Intra-European Fellowship within the 7th European Community Framework Programme.
Version: Accepted for publication
DOI: 10.1016/j.colsurfa.2017.04.077
URI: https://dspace.lboro.ac.uk/2134/25764
Publisher Link: http://dx.doi.org/10.1016/j.colsurfa.2017.04.077
ISSN: 0927-7757
Appears in Collections:Published Articles (Chemical Engineering)

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