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Membrane emulsification: Formation of water in oil emulsions using a hydrophilic membrane

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journal contribution
posted on 13.07.2017 by Pedro T. Santos Silva, Victor Starov, Richard Holdich
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.

Funding

This work was supported by Micropore Technologies Ltd. and funded by a Marie Curie Intra-European Fellowship within the 7th European Community Framework Programme.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Published in

Colloids and Surfaces A: Physicochemical and Engineering Aspects

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.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

29/04/2017

Publication date

2017

Notes

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.

ISSN

0927-7757

Language

en

Exports