Mechanisms and control of single-step microfluidic generation of multi-core double emulsion droplets

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dc.contributor.author Nabavi, Seyed Ali
dc.contributor.author Vladisavljevic, Goran T.
dc.contributor.author Manovic, Vasilije
dc.date.accessioned 2017-04-06T09:45:24Z
dc.date.available 2017-04-06T09:45:24Z
dc.date.issued 2017-04-04
dc.identifier.citation Seyed Ali Nabavi, Goran T. Vladisavljevic, Vasilije Manovic, Mechanisms and control of single-step microfluidic generation of multi-core double emulsion droplets, Chemical Engineering Journal, Volume 322, August 2017, pp140-148 en_UK
dc.identifier.issn 1385-8947
dc.identifier.uri http://dspace.lib.cranfield.ac.uk/handle/1826/11733
dc.identifier.uri http://dx.doi.org/10.1016/j.cej.2017.04.008
dc.description.abstract Single-step generation of monodisperse multi-core double emulsion drops in three-phase glass capillary microfluidic device was investigated using a micro-particle image velocimetry (micro-PIV) system. Phase diagrams were developed to predict the number of encapsulated inner drops as a function of the capillary numbers of inner, middle and outer fluid. The maximum stable number of inner drops cores in uniform double emulsion drops was six. Starting from core/shell drops, the formation of double emulsion drops with multiple cores was achieved by decreasing the capillary number of the outer fluid and increasing the capillary number of the middle fluid. A stable continuous jet of the middle fluid loaded with inner drops was formed at high capillary numbers of the middle fluid. Empirical correlations predicting the size and generation frequency of inner drops as a function of the capillary numbers and the device geometry were developed. Dual-core double emulsion drops were used as templates for the fabrication of polymeric capsules using “on-the-fly” photopolymerisation. The capsule morphology was controlled by manipulating the stability of the inner drops through adjusting the concentration of the lipophilic surfactant in the middle fluid. At low concentration of the lipophilic surfactant, inner drop coalesced during curing and single compartment capsules with thin shells were produced from dual-core drops. The core/shell capsules produced from multi-core drops were monodispersed and larger than those produced from core/shell drops in the same device. en_UK
dc.language.iso en en_UK
dc.publisher Elsevier en_UK
dc.rights Attribution 4.0 International
dc.rights.uri http://creativecommons.org/licenses/by/4.0/
dc.subject Multi-core double emulsion drops and capsules en_UK
dc.subject Capillary microfluidics en_UK
dc.subject Dripping-to-jetting transition en_UK
dc.subject Droplet formation dynamics en_UK
dc.subject Micro-particle image velocimetry en_UK
dc.subject Core/shell silicon microcapsules en_UK
dc.title Mechanisms and control of single-step microfluidic generation of multi-core double emulsion droplets en_UK
dc.type Article en_UK


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