Boskovic, Perica and Sokol, Vesna and Touraud, Didier and Prkic, Ante and Giljanovic, Josipa (2016) The Nanostructure Studies of Surfactant-Free-Microemulsions in Fragrance Tinctures. ACTA CHIMICA SLOVENICA, 63 (1). pp. 138-143. ISSN 1318-0207, 1580-3155
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As it was shown recently that nanostructures can exist in water-ethanol-citronellol tinctures, a deeper investigation of these media was performed using conductivity, UV-Vis and FT-IR spectroscopy techniques. Different regimes of conductivity, depending on the water content, an increase of the polarity of the polar pseudo-phase with increasing water content, and even the presence of free water molecules at higher water content are observed, just as in classical surfactant- based microemulsions. The percolation model, generally used to fit conductivity data in surfactant based microemulsion having a weak interfacial film, can be used to fit our conductivity data below a critical water content (phi(p)(w)) with a critical exponent typical of dynamic percolation. In presence of higher water contents, superior to phi(p)(w), obtained conductivity data cannot be fitted neither with a static nor a dynamic percolation model. As in surfactant-based microemulsions, an increase of polarity of the microenvironment with increasing water content can be postulated using respectively the UV-Vis wavelength absorption band (lambda(max)) of methyl orange and performing FT-IR spectra.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | WATER; OIL; MICROSTRUCTURE; MICELLES; SOLVENTS; STATE; PHASE; Nanostructure; Citronellol; Microemulsions; UV-Vis spectroscopy; Conductivity; FT-IR spectroscopy |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Mar 2019 10:22 |
| Last Modified: | 15 Mar 2019 10:22 |
| URI: | https://pred.uni-regensburg.de/id/eprint/2727 |
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