Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 50: Charged Soft Matter, Polyelectrolytes and Ionic Liquids II
CPP 50.1: Vortrag
Mittwoch, 14. März 2018, 15:00–15:15, C 243
Polyelectrolyte Complexes with Oppositely Charged Microemulsion Droplets: Investigations of Structure and Dynamics — •Michael Gradzielski1, Miriam Simon1, Laurence Noirez2, and Ingo Hoffmann3 — 1Stranski-Laboratorium, Institut für Chemie, TU Berlin — 2Laboratoire Leon-Brillouin (LLB), Saclay, France — 3Institut Laue-Langevin (ILL), Grenoble, France
Mixing polyelectrolytes (PE) with oppositely charged colloids leads to modifications of structure and rheology of the systems. For the case of surfactants that leads to polyelectrolyte/surfactant complexes (PESCs). As loaded micelles are relevant for delivery we studied mixtures of positively charged O/W microemulsion (ME) droplets with negatively charged polyelectrolytes. Based on a thorough determination of the phase behavior, the combination of SLS, DLS, SANS yielded a detailed description of the formed complexes in terms of size, shape and composition. Dynamics were studied by PFGNMR, NSE, and FCS. This yielded a comprehensive picture of how the structure depends on ME size and the type and Mw of the PE.