Reconfigurable surface micropatterns based on the magnetic field-induced shape memory effect in magnetoactive elastomers

Lovšin, Matija (author), Brandl, Dominik (author), Glavan, Gašper (author), Belyaeva, Inna A. (author), Cmok, Luka (author), Čoga, Lucija (author), Kalin, Mitjan (author), Shamonin, Mikhail (author), Drevenšek Olenik, Irena (author)

A surface relief grating with a period of 30 µm is embossed onto the surface of magnetoactive elastomer (MAE) samples in the presence of a moderate magnetic field of about 180 mT. The grating, which is represented as a set of parallel stripes with two different amplitude reflectivity coefficients, is detected via diffraction of a laser beam in the reflection configuration. Due to the magnetic-field-induced plasticity effect, the grating persists on the MAE surface for at least 90 h if the magnetic field remains present. When the magnetic field is removed, the diffraction efficiency vanishes in a few minutes. The described effect is much more pronounced in MAE samples with larger content of iron filler (80 wt%) than in the samples with lower content of iron filler (70 wt%). A simple theoretical model is proposed to describe the observed dependence of the diffraction efficiency on the applied magnetic field. Possible applications of MAEs as magnetically reconfigurable diffractive optical elements are discussed. It is proposed that the described experimental method can be used as a convenient tool for investigations of the dynamics of magnetically induced plasticity of MAEs on the micrometer scale.

• Language: English
• Keywords: magnetoactive elastomers, microstructuring, optical diffraction, shape memory effect, surface microstructuring
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering; FMF - Faculty of Mathematics and Physics
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: 13 str.
• Numbering: Vol. 13, iss. 24, art. 4422
• PID: 20.500.12556/RUL-136939
• UDC: 539.211
• ISSN on article: 2073-4360
• DOI: 10.3390/polym13244422
• COBISS.SI-ID: 90149123
• Publication date in RUL: 25.05.2022

Record is a part of a journal

• Title: Polymers
• Shortened title: Polymers
• Publisher: MDPI
• ISSN: 2073-4360
• COBISS.SI-ID: 517951257

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 16.12.2021

Secondary language

• Language: Slovenian
• Keywords: magnetoaktivni elastomeri, mikrostrukturiranje, uklon svetlobe, oblikovni spomin