Abstract
The static and dynamic dielectric properties of microemulsions were studied by time domain dielectric spectroscopy as a function of temperature, frequency, and concentration of water, oil, surfactant and cosurfactant. The data treatment for the dynamic behavior of the microemulsions was carried out in the time domain in terms of dipole correlation functions and in the frequency domain in terms of complex permittivity. The correlation functions of the investigated systems exhibited complex nonexponential relaxation behavior which must be deconvoluted into normal modes and are represented as a sum of exp (-t/τ) and exp [-(t/τ)v]. The molecular mechanisms responsible for dielectric polarization in microemulsions of different nature are discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 47-61 |
| Number of pages | 15 |
| Journal | Colloids and Surfaces A: Physicochemical and Engineering Aspects |
| Volume | 128 |
| Issue number | 1-3 |
| DOIs | |
| State | Published - 1 Aug 1997 |
| Event | Proceedings of the 1996 11th International Symposium on Surfactants in Solution - Jerusalem, Isr Duration: 1 Jun 1996 → 1 Jun 1996 |
Keywords
- Bound water
- Co-surfactant
- Dielectric spectroscopy
- Microemulsions
- Percolation