Wachter, Wolfgang and Trimmel, Gregor and Buchner, Richard and Glatter, Otto (2011) Dynamics of water confined in self-assembled monoglyceride-water-oil phases. SOFT MATTER, 7 (4). pp. 1409-1417. ISSN 1744-683X, 1744-6848
Full text not available from this repository.Abstract
The dynamics of water confined in various self-assembled liquid-crystalline phases of the system Dimodan U/J-R(+)-limonene-water have been investigated by dielectric relaxation spectroscopy (DRS) over a wide range of frequencies (0.2 <= nu/GHz <= 50). For all phases, two water-related Debye processes were detected, one slightly slower, the other considerably slower, than bulk water. Besides these bulk-like and slow-water relaxations, a further fraction of water does not appear in the dielectric spectra due to strong interactions with the interface (bound water). Increasing the water content of the inverse hexagonal (H-II) phase leads to an increase in both bulk-like and bound water, whereas the amount of slow water remains constant. Furthermore, the bulk-like water relaxation times accelerate until they reach the pure-water value when approaching the saturation line. This finding is supported by differential scanning calorimetry (DSC), which also confirms the presence of three types of water in liquid-crystalline confinement.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DRUG-DELIVERY SYSTEMS; LIQUID-CRYSTALLINE PHASES; DIELECTRIC-RELAXATION; ELECTROLYTE-SOLUTIONS; SUBMICRON PARTICLES; SOLVENT RELAXATION; MICROEMULSIONS; DISPERSIONS; BEHAVIOR; SPECTROSCOPY; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > PD Dr. Richard Buchner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 06 Jul 2020 05:54 |
| Last Modified: | 06 Jul 2020 05:54 |
| URI: | https://pred.uni-regensburg.de/id/eprint/21686 |
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