Confinement-Induced Alteration of Morphologies of
Oil–Water Emulsions
Soumita Maiti
Nitish Singh
Animangsu Ghatak
10.1021/acs.langmuir.9b00067.s001
https://acs.figshare.com/articles/journal_contribution/Confinement-Induced_Alteration_of_Morphologies_of_Oil_Water_Emulsions/7789205
Reversible alteration
between different emulsion morphologies like
core–shell and Janus is conventionally triggered by altering
the interfacial energy between different phases. In contrast, here,
we show that the morphology of dispersed droplets can be changed also
when the emulsion is sufficiently confined between two parallel plates.
In particular, we use three immiscible phases: silicone oil, paraffin
oil, and aqueous solution of surface-active agents like agarose, sodium
dodecylsulfate, dioctyl sodium sulfosuccinate, and cetyl trimethylammonium
bromide to generate oil-in-water emulsions consisting of complex morphologies
of the dispersed droplets. In the unconfined state, the core–shell
drops appear with paraffin oil at the core and silicone oil at the
shell. However, the morphology of oil droplets changes to Janus when
the emulsion is confined between two parallel plates. We have shown
that the meniscus of the continuous phase that forms between the parallel
plates alters the pressure field in the emulsion and the total energy
of the system, which trigger such morphological transition.
2019-02-18 00:00:00
paraffin oil
morphology
emulsion
silicone oil
dioctyl sodium sulfosuccinate
core
cetyl trimethylammonium bromide
Janus
phase
morphologie
oil droplets changes