Kuttich, Björn ; Grefe, Ann-Kathrin ; Stühn, B. (2016)
Changes in the bending modulus of AOT based microemulsions induced by the incorporation of polymers in the water core.
In: SOFT MATTER, 12 (30)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The bending modulus k is known to be a crucial parameter for the stability of the droplet phase in microemulsion systems. For AOT based water in oil microemulsions the bending modulus of the surfactant has values close to kBT but can be influenced by the presence of polymers. In this work we focus on the water soluble polymer polyethylene glycol and how it influences the bending modulus. An increase by a factor of three is found. For the correct evaluation of the bending modulus via percolation temperatures and droplet radii, thus by dielectric spectroscopy and small angle X-ray scattering, the determination of the radii right at the percolation temperature is crucial as we will show, although it is often neglected. In order to precisely determine the droplet radii we will present a global fitting model which provides reliable results with a minimum number of free fitting parameters.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Kuttich, Björn ; Grefe, Ann-Kathrin ; Stühn, B. |
| Art des Eintrags: | Bibliographie |
| Titel: | Changes in the bending modulus of AOT based microemulsions induced by the incorporation of polymers in the water core |
| Sprache: | Englisch |
| Publikationsjahr: | 2016 |
| Ort: | THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND |
| Verlag: | ROYAL SOC CHEMISTRY |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | SOFT MATTER |
| Jahrgang/Volume einer Zeitschrift: | 12 |
| (Heft-)Nummer: | 30 |
| Veranstaltungsort: | THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND |
| Kurzbeschreibung (Abstract): | The bending modulus k is known to be a crucial parameter for the stability of the droplet phase in microemulsion systems. For AOT based water in oil microemulsions the bending modulus of the surfactant has values close to kBT but can be influenced by the presence of polymers. In this work we focus on the water soluble polymer polyethylene glycol and how it influences the bending modulus. An increase by a factor of three is found. For the correct evaluation of the bending modulus via percolation temperatures and droplet radii, thus by dielectric spectroscopy and small angle X-ray scattering, the determination of the radii right at the percolation temperature is crucial as we will show, although it is often neglected. In order to precisely determine the droplet radii we will present a global fitting model which provides reliable results with a minimum number of free fitting parameters. |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Festkörperphysik (2021 umbenannt in Institut für Physik Kondensierter Materie (IPKM)) 05 Fachbereich Physik > Institut für Festkörperphysik (2021 umbenannt in Institut für Physik Kondensierter Materie (IPKM)) > Experimentelle Physik kondensierter Materie |
| Hinterlegungsdatum: | 30 Jan 2017 12:10 |
| Letzte Änderung: | 12 Dez 2018 15:32 |
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