Issue 2, 2019

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

Abstract

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.

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

Article information

Article type
Paper
Submitted
10 Sep 2018
Accepted
27 Oct 2018
First published
19 Nov 2018
This article is Open Access
Creative Commons BY-NC license

Soft Matter, 2019,15, 175-189

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

P. A. Sánchez, E. S. Minina, S. S. Kantorovich and E. Yu. Kramarenko, Soft Matter, 2019, 15, 175 DOI: 10.1039/C8SM01850B

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