Berlin 2012 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 20: (Hydro)gels and Elastomers
CPP 20.5: Vortrag
Mittwoch, 28. März 2012, 10:30–10:45, C 264
Computersimulations of Magnetic Gels — •Rudolf Weeber1, Sofia Kantorovich1,2, and Christian Holm1 — 1Institute for Computational Physics, University of Stuttgart, Pfaffenwaldring 27, 70569 Stuttgart, Germany — 2Ural Federal University, Lenin Avenue 51, 620000 Ekaterinburg, Russia
Magnetic gels consist of magnetic nano-particles embedded in a cross-linked polymer network. They have potential applications ranging from medicine to engineering, such as drug release systems and artificial muscles. These applications rely on the combination of the mechanical properties of the polymer network with the ability to modify and control the sample with external magnetic fields due to the embedded magnetic nano-particles.
Today, many aspects of the synthesis of ferrogels are understood and the properties of gels can be characterized and tailored. However, many questions concerning the microstructure and its influence on macroscopic properties of magnetic gels are still open. Here computer simulations can help since they allow to study simplified model systems which focus on certain characteristic features of the material.
In this contribution we present computer models which demonstrate different mechanisms of deformation and changing elastic properties of a ferrogel in an external magnetic field. They help to explain the contradicting findings for the shape change of magnetic gels observed in experiments.