Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 25: Focus: Functional Polymer Hybrids II
CPP 25.6: Vortrag
Dienstag, 8. März 2016, 15:45–16:00, H51
Multiresponsive PNIPAM Microgels Doped with Magnetic Nanoparticles — •Marcus U. Witt1, Sebastian Backes1, Eric Roeben2, Birgit Fischer3, Annette M. Schmidt2, and Regine v. Klitzing1 — 1Technische Universität Berlin, Institut für Chemie, Stranski Laboratorien, Straße des 17. Juni 124, 10623 Berlin — 2Universität zu Köln, Institut für Physikalische Chemie, Luxemburger Straße 116, 50939 Köln Gebäude 322 — 3Universität Hamburg, Institut für Physikalische Chemie, Grindelallee 117, 20146 Hamburg
N-isopropylacrylamide (NIPAM) based microgels exhibit a volume phase transition temperature (VPTT) at approximately 32°C. This VPTT leads to a reversible swelling and shrinking in water due to changes in temperature. There are several co-monomers which can be added to achieve additional responsive parameters such as pH or the ionic strength. To make the gels responsive to an external magnetic field we incubated magnetic nanoparticles (MNP) in the gel structure (ferrogel). In the present study different synthesis strategies are applied for the fabrication of homogenous and heterogeneous microgels. The effect of MNP loading due to the internal structure is studied. The investigation governs the thermoresponsive behavior of the ferrogel, the distribution of the MNP inside the gel matrix and the response to a static magnetic field in bulk and at a solid surface.