Hydrophobized+and+IFT+paper+revised+version+vfinal+.pdf (3.06 MB)
Water in oil emulsions from hydrophobized metal membranes and characterization of dynamic interfacial tension in membrane emulsification
journal contributionposted on 2017-08-11, 11:13 authored by Pedro T. Santos Silva, Serena Morelli, Marijana DragosavacMarijana Dragosavac, Victor Starov, Richard Holdich
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.
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.
- Aeronautical, Automotive, Chemical and Materials Engineering
- Chemical Engineering
Published inColloids and Surfaces A: Physicochemical and Engineering Aspects
CitationSILVA, 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, 532, pp. 77-86.
- AM (Accepted Manuscript)
Publisher statementThis 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/
NotesThis paper was accepted for publication in the journal Colloids and Surfaces A: Physicochemical and Engineering Aspectss and the definitive published version is available at http://dx.doi.org/10.1016/j.colsurfa.2017.06.051