Surface relief of magnetoactive elastomeric films in a homogeneous magnetic field: molecular dynamics simulations

Autor(en)

Pedro A. Sánchez, Elena Minina, Sofia Kantorovich, Elena Yu. Kramarenko

Abstrakt

The structure of a thin magnetoactive elastomeric (MAE) film adsorbed on a solid substrate is studied by molecular dynamics simulations. Within the adopted coarse-grained approach, a MAE film consists of magnetic particles modeled as soft-core spheres, carrying point dipoles, connected by elastic springs representing a polymer matrix. MAE films containing 20, 25 and 30 vol% of randomly distributed magnetic particles are simulated. Once a magnetic field is applied, the competition between dipolar, elastic and Zeeman forces leads to the restructuring of the layer. The distribution of the magnetic particles as well as elastic strains within the MAE films are calculated for various magnetic fields applied perpendicular to the film surface. It is shown that the surface roughness increases strongly with growing magnetic field. For a given magnetic field, the roughness is larger for the softer polymeric matrix and exhibits a nonmonotonic dependence on the magnetic particle concentration. The obtained results provide a better understanding of the MAE surface structuring as well as possible guidelines for fabrication of MAE films with a tunable surface topology.

Organisation(en)

Computergestützte Physik und Physik der Weichen Materie

Externe Organisation(en)

Ural Federal University, Lomonosov Moscow State University (MSU), Russian Academy of Sciences

Journal

Soft Matter

Band

15

Seiten

175-189

Anzahl der Seiten

15

ISSN

1744-683X

DOI

https://doi.org/10.1039/C8SM01850B

Publikationsdatum

11-2018

Peer-reviewed

Ja

ÖFOS 2012

103020 Oberflächenphysik, 103023 Polymerphysik

Schlagwörter

ASJC Scopus Sachgebiete

Condensed Matter Physics, Allgemeine Chemie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/bacb955e-7034-4616-b4da-fb4dc2d0f3a2