Appel, M. ; Spehr, T. ; Wipf, R. ; Stühn, B. (2012)
Water–AOT–alkylbenzene microemulsions: Influence of alkyl chain length on structure and percolation behavior.
In: Journal of Colloid and Interface Science, 376 (1)
doi: 10.1016/j.jcis.2012.02.062
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We study the percolation behavior of the water-in-oil (w/o) droplet phase of AOT (sodium bis[2-ethylhexyl] sulfosuccinate)-based microemulsions with different alkylbenzenes (toluene, ethylbenzene, butylbenzene or octylbenzene) as oil phase. We use microemulsions of varying composition with molar water to surfactant ratios 0 ⩽ W ⩽ 50 and droplet (water plus surfactant) volume fractions 10% ⩽ ϕ ⩽ 50%. Using dielectric spectroscopy, a percolation transition is observed in w/o microemulsions with butylbenzene or octylbenzene. With increasing molecular weight of the alkylbenzene, the percolation temperature TP decreases. The structure of the microemulsions is determined by small angle X-ray scattering (SAXS). With increasing molar weight of the alkylbenzene, the stability range of the L2 droplet phase extends to higher W. The larger amount of solubilizable water can be related to variable oil penetration of the AOT monolayer, which affects the spontaneous curvature of the surfactant shell.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2012 |
| Autor(en): | Appel, M. ; Spehr, T. ; Wipf, R. ; Stühn, B. |
| Art des Eintrags: | Bibliographie |
| Titel: | Water–AOT–alkylbenzene microemulsions: Influence of alkyl chain length on structure and percolation behavior |
| Sprache: | Englisch |
| Publikationsjahr: | 15 Juni 2012 |
| Verlag: | ELSEVIER |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Colloid and Interface Science |
| Jahrgang/Volume einer Zeitschrift: | 376 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.1016/j.jcis.2012.02.062 |
| URL / URN: | http://www.sciencedirect.com/science/article/pii/S0021979712... |
| Kurzbeschreibung (Abstract): | We study the percolation behavior of the water-in-oil (w/o) droplet phase of AOT (sodium bis[2-ethylhexyl] sulfosuccinate)-based microemulsions with different alkylbenzenes (toluene, ethylbenzene, butylbenzene or octylbenzene) as oil phase. We use microemulsions of varying composition with molar water to surfactant ratios 0 ⩽ W ⩽ 50 and droplet (water plus surfactant) volume fractions 10% ⩽ ϕ ⩽ 50%. Using dielectric spectroscopy, a percolation transition is observed in w/o microemulsions with butylbenzene or octylbenzene. With increasing molecular weight of the alkylbenzene, the percolation temperature TP decreases. The structure of the microemulsions is determined by small angle X-ray scattering (SAXS). With increasing molar weight of the alkylbenzene, the stability range of the L2 droplet phase extends to higher W. The larger amount of solubilizable water can be related to variable oil penetration of the AOT monolayer, which affects the spontaneous curvature of the surfactant shell. |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik > Institut für Festkörperphysik (2021 umbenannt in Institut für Physik Kondensierter Materie (IPKM)) > Experimentelle Physik kondensierter Materie 05 Fachbereich Physik > Institut für Festkörperphysik (2021 umbenannt in Institut für Physik Kondensierter Materie (IPKM)) 05 Fachbereich Physik |
| Hinterlegungsdatum: | 16 Apr 2012 07:12 |
| Letzte Änderung: | 05 Mär 2013 10:00 |
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