Wachter, Wolfgang and Buchner, Richard (2009) Dielectric Spectroscopy of Co-Ion Effects on Microemulsion Dynamics and Phase Behaviour. ACTA CHIMICA SLOVENICA, 56 (1). pp. 53-57. ISSN 1318-0207, 1580-3155
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The effect of added cationic co-ions (Li+, Na+, Cs+, (CH3)(4)N+) on the dielectric spectra of didodecyldimethylammonium bromide / water / n-dodecane microemulsions is reported. At high water/surfactant mole ratios (W approximate to 100-120) small amounts of co-ions drastically change the shape of the dielectric spectra in the 5-500 MHz region whereas for W approximate to 20 almost no effect is observed. It is shown that the sensitivity of the dielectric spectra towards co-ion addition correlates with the percolation transition of the microemulsion structure from reverse micelles at high W to a bicontinuous phase at low W.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DIDODECYLDIMETHYLAMMONIUM BROMIDE; WATER; MICROSTRUCTURE; RELAXATION; SYSTEMS; Microemulsions; dielectric spectroscopy; phase behaviour; co-ion effect |
| 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: | 07 Oct 2020 10:54 |
| Last Modified: | 07 Oct 2020 10:54 |
| URI: | https://pred.uni-regensburg.de/id/eprint/29592 |
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