Interfacial Tension and Interface Phase Transitions in Two-Phase Water-Long-Chained Alcohols Systems

The interfacial tensions of six two-phase systems of water-normal alcohols (number of carbon atoms from 10 to 15) were measured in function of temperature, using the Wilhelmy plate method. In all cases, unusual dependencies of the interfacial tension τ on the temperature T were found. At temperature...

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Bibliographic Details
Published in:Journal of colloid and interface science 1993-07, Vol.158 (2), p.382-387
Main Authors: Glinski, J., Chavepeyer, G., Platten, J.K., De Saedeleer, C.
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
Gas-liquid interface and liquid-liquid interface
General and physical chemistry
Surface physical chemistry
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Summary:The interfacial tensions of six two-phase systems of water-normal alcohols (number of carbon atoms from 10 to 15) were measured in function of temperature, using the Wilhelmy plate method. In all cases, unusual dependencies of the interfacial tension τ on the temperature T were found. At temperatures close to the melting point of the organic phase, the interfacial tension behaves linearly, with a considerably large, positive slope. A few degrees above the melting point a phase transition occurs, and the dependence τ = ∫(T) becomes parabolical, resembling the water-alcohols systems with lower numbers of carbon atoms. The results obtained are interpreted in terms of interface structure and solid-like monolayer formed on the interface.
ISSN:0021-9797
1095-7103
DOI:10.1006/jcis.1993.1269