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Interfacial viscosity and the stability of emulsions
Author(s) -
Campanelli John R.,
Cooper David G.
Publication year - 1989
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450670518
Subject(s) - emulsion , viscometer , viscosity , rheology , chemical engineering , chromatography , materials science , chemistry , organic chemistry , composite material , engineering
A viscous traction interfacial viscometer was constructed to study a mineral oil‐water‐emulsifier system. The effect on interfacial viscosity of the synthetic emulsifiers Span 80 and Pluronic L42 were investigated, along with the bioemulsifier produced by the yeast Torulopsis petrophilum. In the case of the synthetic emulsifiers, it was found that conditions which maximized interfacial viscosity also maximized emulsion stability. The same relation held for T. petrophilum emulsifier once all free fatty acids had been removed from the broth. Emulsion stability was measured by calculating mean diameters, as well as emulsion indices.