Influence of Phase Orientation on the Measurement of Interfacial Tension by Spinning Drop Tensiometry

Jump To References Section

Authors

  • Department of Chemical Engineering, University of Ottawa, Ottawa, Ontario, KIN 6N5 ,CA
  • Department of Chemical Engineering, University of Ottawa, Ottawa, Ontario, KIN 6N5 ,CA

DOI:

https://doi.org/10.18311/jsst/1995/2196

Keywords:

Interfacial Tension (IFT).

Abstract

The effect of phase orientation on the apparent interfacial tension measured by the spinning drop technique was investigated using the butanol-1/water two-phase system. Addition of a surfactant to the butanol-rich droplet produced a time-dependent IFT which slowly increased to a constant value of about 1.3 mN/m. When the surfactant was added to the water-rich external phase, the IFT was constant at 0.8 mN/m, which was identical with that when the surfactant was added to both phases.