Monodisperse emulsion generation via drop break off in a coflowing stream

Citation
Pb. Umbanhowar et al., Monodisperse emulsion generation via drop break off in a coflowing stream, LANGMUIR, 16(2), 2000, pp. 347-351
Citations number
25
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
LANGMUIR
ISSN journal
0743-7463 → ACNP
Volume
16
Issue
2
Year of publication
2000
Pages
347 - 351
Database
ISI
SICI code
0743-7463(20000125)16:2<347:MEGVDB>2.0.ZU;2-7
Abstract
We describe an experimental technique for the production of highly monodisp erse emulsions (with minimum achievable polydispersities <3%). The phase to be dispersed is introduced into a coflowing, surfactant-laden continuous p hase via a tapered capillary. Drops detach from the capillary when the stre amwise forces exceed the force due to interfacial tension. Drop size is a f unction of the capillary tip diameter, the velocity of the continuous phase , the extrusion rate, and the viscosities and interfacial tension of the tw o phases. Emulsions composed of a variety of fluids and with drop sizes ran ging from 2 to 200 mu m have been produced using this technique.