Temperature and composition induced morphology transition of Cerberus emulsion droplets

[Display omitted] Various advanced geometries are endowed by the unique structure of “three rooms” of immiscible oils composing the Cerberus droplets. Adjustable interfacial properties and tunable volume ratio in the four-liquid system render it possible to realize the controlled morphology transiti...

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Bibliographic Details
Published in:Journal of colloid and interface science 2019-10, Vol.554, p.210-219
Main Authors: Ge, Lingling, Tong, Weijie, Bian, Qingfa, Wei, Duo, Guo, Rong
Format: Article
Language:English
Subjects:
Complex droplets
Emulsions
Interface equilibrium
Morphology transition
Phase diagram
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Summary:[Display omitted] Various advanced geometries are endowed by the unique structure of “three rooms” of immiscible oils composing the Cerberus droplets. Adjustable interfacial properties and tunable volume ratio in the four-liquid system render it possible to realize the controlled morphology transition by the variation of temperature and emulsion composition. Cerberus emulsions are prepared in batch scale by traditional one-step vortex mixing, employing the oil combinations of methacryloxypropyl dimethyl silicone (DMS)/2-(perfluorooctyl) ethyl methacrylate (PFOEMA)/vegetable oil (VO). Emulsifier of pluoronic F127, a temperature sensitive surfactant is applied. Stereoscopic topological phase diagram as functions of temperature and composition are plotted. Numerical calculations on the droplet morphology including interface curvature, contact angle, and volume fraction of each domain are performed. Four primary regions with specific morphologies, i.e. “VO > DMS  DMS > PFOEMA”, “VO  PFOEMA”, and finally “VO 
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2019.07.011