Berlin 2008 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 8: POSTERS Dynamics and Diffusion
CPP 8.1: Poster
Montag, 25. Februar 2008, 16:45–19:00, Poster A
dynamical and structural properties of sugar surfactant based bicontinuous microemulsions — •Stefan Wellert1, Matthias Karg1, Thomas Hellweg1, Olaf Holderer2, Hans-Juergen Altmann3, and Andre Richardt3 — 1University Bayreuth, PC I, Universitaetsstrasse 30, D-95440 Bayreuth — 2Juelich Centre for Neutron Science (JCNS), FZ. Juelich GmbH, Aussenstelle am FRM II, Lichtenbergstr. 1, D-85747 Garching — 3Bundeswehr Scientific Institute (NBC-Protection), Humboldtstr., D-29633 Munster
Structural and dynamical properties of bicontiuous microemulsions developped for decontamination applications were studied by different scattering techniques. Microemulsion phases with a large internal surface like the bicontinuous region are of main interest for the application as soft and environmental compatible decontamination media for a variety of toxic compounds like pesticides or chemical warfare agents.
Based on APGs, RME, water and an additional alcohol we characterize the phase behavior of such systems as well as the microstructure, investigated using small angle neutron scattering (SANS), neutron spin echo spectroscopy (NSE) and dynamic light scattering.
Additionally, neutron spin echo measurements allow to gain insight into the dynamics of these films and to compare the data with theoretical descriptions like the approach of Zilman and Granek. Beside the undulations of the amphiphilic film also additional contributions due to collective motions are discussed.