Interfacial Tension and Interface Phase Transitions in Two-Phase Water-Long-Chained Alcohols Systems
✍ Scribed by J. Glinski; G. Chavepeyer; J.K. Platten; C. De Saedeleer
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 266 KB
- Volume
- 158
- Category
- Article
- ISSN
- 0021-9797
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✦ Synopsis
The interfacial tensions of six two-phase systems of waternormal 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 (\tau) 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 (\tau=f(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. ( 1993 Academic Press, Inc.