A.Schmidt: Magnetomechanical coupling of single domain particles in viscoelastic polymer matrices for actuation and as nanorheological probes
Description
The fundamental knowledge of the interaction between a polymer matrix and dispersed particles on the length scale of their interface is essential to control the properties of composite materials.
For this purpose a toolbox of hybrid materials is developed and analyzed consisting of different polymer matrices filled with nanoscopic magnetic tracers or actuators. The aspired particle-polymer systems exhibit a broad range of (dynamical) crosslinking in the polymer component, as well as different coupling mechanisms between the particles and the polymer segments. We employ (elongated) one-domain-particles and poly(ethylene oxide) solutions or gels. The magneto-mechanical properties of the materials can be varied between predominantly elastic gels and viscous fluids with the full viscoelastic spectrum accessible. Modification of the particle surface is used to tailor the interactions between particles and polymer matrix. The particles can be immobilized either physically or chemically in the polymer system.
Consequently, the particles serve on the one hand as tracers for magnetomechanical coupling on the nanometer scale, and on the other hand as actuators for the field-regulated manipulation of the material properties.
Hybridstructures of different architecture: a) particlelinked gel, b) conventional ferrogel, c) polymer solution, d) dynamic network.
Project Manager
Prof. Dr. Annette M. Schmidt, Universität zu Köln
Staff
Melissa Hermes, Universität zu Köln
Matthias Kundt, Universität zu Köln
Eric Roeben, Universität zu Köln
Grant period
Publications
Backes, S.; Witt, M.; Roeben, E.; Kuhrts, L.; Aleed, S.; Schmidt, A. M.; von Klitzing, R. (2015) „Loading of PNIPAM Based Microgels with CoFe2O4 Nanoparticles and their Magnetic Response in Bulk and at Surfaces“ The Journal of Physical Chemistry B
Remmer, H.; Dieckhoff, J.; Tschöpe, A.; Roeben, E.; Schmidt, A.M.; Ludwig, F. (2015) „Dynamics of CoFe2O4 Single-Core Nanoparticles in Viscoelastic Media“ Physics Procedia
Landers, J.; Roeder, L.; Salamon, S.; Schmidt, A.M.; Wende, H. (2015) „Particle-matrix interaction in cross-linked PAAm-hydrogels analyzed by Mössbauer spectroscopy“ The Journal of Physical Chemistry C
Contact
Universität zu Köln
Institut für Physikalische Chemie
Luxemburger Str. 116
D-50939 Köln