Ferrogels cross-linked by magnetic particles

Autor(en)

Rudolf Weeber, Sofia Kantorovich, Christian Holm

Abstrakt

Ferrogels, i.e., swollen polymer networks into which magnetic particles are immersed, can be considered as “smart materials” since their shape and elasticity can be controlled by an external magnetic field. Using molecular dynamics simulations on the coarse-grained level, we study a ferrogel in which the magnetic particles act as the cross-linkers of the polymer network. In a homogeneous external magnetic field, the direct coupling between the orientation of the magnetic moments and the polymers by means of covalent bonds gives rise to a deformation of the gel, independent of the interparticle dipole-dipole interaction. In this paper, we quantify this deformation, and, in particular, we investigate the gel’s elastic moduli and its magnetic response for two different connectivities of the network nodes. Our results demonstrate that these properties depend significantly on the topology of the polymer network.

Organisation(en)

Computergestützte Physik und Physik der Weichen Materie

Externe Organisation(en)

Universität Stuttgart, Ural Federal University

Journal

Journal of Chemical Physics

Band

143

Anzahl der Seiten

11

ISSN

0021-9606

DOI

https://doi.org/10.1063/1.4932371

Publikationsdatum

10-2015

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie, 103023 Polymerphysik, 103006 Chemische Physik, 103017 Magnetismus

Schlagwörter

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie, Physical and Theoretical Chemistry

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/784ac525-0409-492e-ba2f-70d71e7cb162