Reference : From a bouncing compound drop to a double emulsion
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/105074
From a bouncing compound drop to a double emulsion
English
Terwagne, Denis mailto [Université de Liège - ULiège > Département de physique > Physique statistique >]
Gilet, Tristan mailto [Université de Liège - ULiège > Département d'aérospatiale et mécanique > Micro mécanique >]
Vandewalle, Nicolas mailto [Université de Liège - ULiège > Département de physique > Physique statistique >]
Dorbolo, Stéphane mailto [Université de Liège - ULiège > Département de physique > Physique statistique >]
2010
Langmuir
American Chemical Society
26
14
11680
Yes (verified by ORBi)
International
0743-7463
1520-5827
Washington
DC
[en] Droplet ; Emulsion ; Microfluidics
[en] We show that a double emulsion (oil in water in oil) can be created starting from a compound droplet (surfactant solution in oil). The compound drop bounces on a vertically vibrated liquid surface. When the amplitude of the vibration exceeds a threshold value, the oil layer penetrates the water content and leaves a tiny oil droplet within. As this phenomenon occurs at each vigorous impact, the compound drop progressively transforms into a double emulsion. The emulsification threshold, which is observed to depend on the forcing frequency but not on the drop size, is rationalized by investigating the impact of compound drops onto a static liquid surface. The droplet creation occurs when the kinetic energy released at impact is larger than the energy required to deform the compound drop, namely when the Weber number is higher than a given threshold value.
Researchers ; Professionals ; Students ; General public ; Others
http://hdl.handle.net/2268/105074
also: http://hdl.handle.net/2268/63877
10.1021/la101096q

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