Kuttich, B. ; Ivanova, O. ; Grillo, I. ; Stühn, B. (2016)
Polymer loaded microemulsions: Changeover from finite size effects to interfacial interactions.
In: JOURNAL OF CHEMICAL PHYSICS, 145 (16)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Form fluctuations of microemulsion droplets are observed in experiments using dielectric spectroscopy (DS) and neutron spin echo spectroscopy (NSE). Previous work on dioctyl sodium sulfosuccinate based water in oil microemulsions in the droplet phase has shown that adding a water soluble polymer (Polyethylene glycol M = 1500 g mol(-1)) modifies these fluctuations. While for small droplet sizes (water core radius r(c) < 37 angstrom) compared to the size of the polymer both methods consistently showed a reduction in the bending modulus of the surfactant shell as a result of polymer addition, dielectric spectroscopy suggests the opposite behaviour for large droplets. This observation is now confirmed by NSE experiments on large droplets. Structural changes due to polymer addition are qualitatively independent of droplet size. Dynamical properties, however, display a clear variation with the number of polymer chains per droplet, leading to the observed changes in the bending modulus. Furthermore, the contribution of structural and dynamical properties on the changes in bending modulus shifts in weight. With increasing droplet size, we initially find dominating finite size effects and a changeover to a system, where interactions between the confined polymer and the surfactant shell dominate the bending modulus. Published by AIP Publishing.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Kuttich, B. ; Ivanova, O. ; Grillo, I. ; Stühn, B. |
| Art des Eintrags: | Bibliographie |
| Titel: | Polymer loaded microemulsions: Changeover from finite size effects to interfacial interactions |
| Sprache: | Englisch |
| Publikationsjahr: | 2016 |
| Ort: | 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA |
| Verlag: | AMER INST PHYSICS |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | JOURNAL OF CHEMICAL PHYSICS |
| Jahrgang/Volume einer Zeitschrift: | 145 |
| (Heft-)Nummer: | 16 |
| Veranstaltungsort: | 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA |
| Kurzbeschreibung (Abstract): | Form fluctuations of microemulsion droplets are observed in experiments using dielectric spectroscopy (DS) and neutron spin echo spectroscopy (NSE). Previous work on dioctyl sodium sulfosuccinate based water in oil microemulsions in the droplet phase has shown that adding a water soluble polymer (Polyethylene glycol M = 1500 g mol(-1)) modifies these fluctuations. While for small droplet sizes (water core radius r(c) < 37 angstrom) compared to the size of the polymer both methods consistently showed a reduction in the bending modulus of the surfactant shell as a result of polymer addition, dielectric spectroscopy suggests the opposite behaviour for large droplets. This observation is now confirmed by NSE experiments on large droplets. Structural changes due to polymer addition are qualitatively independent of droplet size. Dynamical properties, however, display a clear variation with the number of polymer chains per droplet, leading to the observed changes in the bending modulus. Furthermore, the contribution of structural and dynamical properties on the changes in bending modulus shifts in weight. With increasing droplet size, we initially find dominating finite size effects and a changeover to a system, where interactions between the confined polymer and the surfactant shell dominate the bending modulus. Published by AIP Publishing. |
| 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: | 14 Nov 2023 09:44 |
| PPN: | |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Frage zum Eintrag |
Optionen (nur für Redakteure)
 |
Redaktionelle Details anzeigen |
Drucken
Impressum