Dresden 2009 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 2: Focus: Amphiphilic Systems II
CPP 2.4: Vortrag
Montag, 23. März 2009, 15:15–15:30, ZEU 222
Dynamics of Morphological Transitions in Self-Aggregating Systems Studied by Stopped-Flow Experiments — •Anina Barth1, Michael Gradzielski1, Isabelle Grillo2, and Theyencheri Narayanan3 — 1Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, D-10587 Berlin, Germany — 2Institut Max von Laue-Paul Langevin (ILL), F-38042 Grenoble Cedex 9, France — 3European Synchrotron Radiation Facility (ESRF), BP 220 F-38043 Grenoble Cedex
The question of the dynamic behaviour of amphiphilic systems has been investigated. One way to study rapid kinetics is the stopped-flow method in which two volumes of solutions are rapidly mixed and the properties of the mixed solution followed as a function of time, for instance by fluorescence spectroscopy, turbidity, conductivity measurements and small-angle x-ray or neutron scattering. A topic of broad interest is the interaction of surfactants in aqueous solution with hydrophobic material. Although there has been a deep interest in the dynamics of micellar solutions some years ago, less is known about the more complex process of solubilisation. For that purpose quaternary systems of surfactant, cosurfactant, oil, and water were employed and by a systematic variation of their molecular architecture a comprehensive understanding of the solubilisation dynamics is to be achieved. Stopped-Flow fluorescence measurements were done in order to study the formation process of and exchange dynamic between microemulsion droplets.