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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