Mesoscopic dynamics of the polyelectrolyte in oppositely charged polyelectrolyte/surfactant systems studied by contrast variation NSE
Oppositely charged polyelectrolyte/surfactant systems show complex behaviour with respect to their structural and dynamical features. Especially the dynamic properties, which are related to their interesting rheological features, are still only rather poorly understood. A key role here plays the polyelectrolyte but its individual mesoscopic dynamics is difficult to study, except by the unique option of employing NSE and the concept of contrast variation. By using d-SDS or h-SDS and protiated JR 400 and PDADMAC as polycation we will be able to see individually the dynamics of the whole complex and of the polycation alone. A test measurement with d-SDS and JR 400 suggests that the polyelectrolyte is free to move within the aggregates but is hindered in its motion on times scales long enough for it to explore the limits of the aggregate. With this experiment we intend to further investigate this behaviour and explore its dependence on polyelectrolye charge density. It is to be expected that this NSE experiment can shed light on the mesoscopic dynamics of such systems that can not be obtained from any other experimental method.
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GRADZIELSKI Michael; FARAGO Bela; HOFFMANN Ingo and SHARP Melissa. (2013). Mesoscopic dynamics of the polyelectrolyte in oppositely charged polyelectrolyte/surfactant systems studied by contrast variation NSE. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-12-327
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