Regensburg 2013 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 48: (Hydro)gels and Elastomers
CPP 48.4: Vortrag
Freitag, 15. März 2013, 10:30–10:45, H39
Investigation of a multiresponsive hydrogel based on poly(methoxydiethylenglycol acrylate) (PMDEGA) with azobenzene moieties — •David Magerl1, David Egger1, Anna Miasnikova2, André Laschewsky2, Christine M. Papadakis1, and Peter Müller-Buschbaum1 — 1TU München, Physik Department, Lehrstuhl Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany — 2Institut für Chemie, Universität Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam-Golm, Germany
Stimuli-responsive hydrogels are of increasing interest because of their use in a variety of applications such as drug-delivery and sensors. In this context hydrogels that are responsive to one external stimulus like temperature, as it is the case for poly(methoxydiethylenglycol acrylate) (PMDEGA), are widely studied. [1] By addition of moieties of azobenzene groups to form a statistical copolymer, a second stimulus, namely light, can be added to the system.
In this study we are investigating in the complex interplay between the temperature and light sensitive properties in the P(MDEGA-stat-azoMDEGA) system with varied azoMDEGA content. Dynamic light scattering is used to probe the hydrodynamic radius in aqueous solutions. On the other hand, white light interferometry gives access to the time-resolved swelling behavior in thin films at the presence of a water vapor atmosphere.
[1] Zhong, Q., et al., Soft Matter, 2012. 8(19): p. 5241-5249.