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Effects of oil phase viscosity on interfacial tension behaviour of oil/alkaline systems as measured by the spinning drop tensiometer
Author(s) -
Neale Graham H.,
Khulbe Kailash C.,
Hornof Vladimir
Publication year - 1987
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.5450650430
Subject(s) - tensiometer (surface tension) , surface tension , viscosity , drop (telecommunication) , spinning , spinning drop method , materials science , chemistry , thermodynamics , viscometer , phase (matter) , composite material , organic chemistry , mechanical engineering , physics , engineering
This note examines the effects of oil phase viscosity on the interfacial tension of reacting systems (acidic crude oils in contact with alkaline solutions) as measured by the Spinning Drop Tensiometer. Surfactants are produced by chemical reactions at the interface, thereby causing the shape of the oil droplet in the tensiometer to change continuously. The rates of droplet elongation/contraction are necessarily influenced by the oil phase viscosity, thereby affecting directly the measured interfacial tension. The principal conclusion of this work is that although oil phase viscosity exerts a significant effect on the dynamic interfacial tension after attainment of the minimum value, it makes for only a small absolute change in the magnitude of the minimum interfacial tension itself.