The influence of temperature upon the dielectric behaviour of water-in-hexadecane microemulsions
- 1 June 1978
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 11 (8), L117-L121
- https://doi.org/10.1088/0022-3727/11/8/004
Abstract
The dielectric behaviour of water-in-hexadecane microemulsions (potassium oleate being the surfactant and hexanol the cosurfactant) has been investigated for different values of the mass fraction of water p between 20 degrees C and 45 degrees C and over the frequency range 100 kHz-2000 MHz. A dielectric relaxation of the Cole-Cole type was found. Upon increasing the temperature T, the low-frequency relative permittivity epsilon 1 passes through a maximum whilst the critical frequency nu c passes through a minimum. The maximum of the epsilon 1 versus T curve decreases and shifts towards higher temperatures upon decreasing p.Keywords
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