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Updated: Jul 16, 2026

Double Emulsion Generation Using a Polydimethylsiloxane (PDMS) Co-axial Flow Focus Device
Published on: December 25, 2015
Simple and double emulsions via coaxial jet electrosprays
Alvaro G Marín1, Ignacio G Loscertales, M Márquez
1Escuela Superior de Ingenieros, Universidad de Sevilla, C de los Descubrimientos s/n 41092, Sevilla, Spain. alvarogm@us.es
Abstract:
We report for the first time the generation of electrified coaxial jets of micrometric diameter in liquid media. Scaling laws to predict the inner and outer diameter of the coaxial jet are given. We show some experiments illustrating the formation process of the coaxial jet, and demonstrate how this process can be used to yield either o/w (oil in water) or o/w/o (oil/water/oil) emulsions of micrometric size. Some interesting analogies with other hydrodynamic focusing processes are also pointed out.
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