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Lovšin M, Brandl D, Glavan G, Belyaeva IA, Cmok L, Čoga L, Kalin M, Shamonin M, Drevenšek-Olenik I. Reconfigurable Surface Micropatterns Based on the Magnetic Field-Induced Shape Memory Effect in Magnetoactive Elastomers. Polymers (Basel) 2021; 13:polym13244422. [PMID: 34960973 PMCID: PMC8708412 DOI: 10.3390/polym13244422] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 12/10/2021] [Accepted: 12/14/2021] [Indexed: 11/20/2022] Open
Abstract
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.
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Affiliation(s)
- Matija Lovšin
- Department of Complex Matter, J. Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (M.L.); (L.C.)
| | - Dominik Brandl
- East Bavarian Centre for Intelligent Materials (EBACIM), Ostbayerische Technische Hochschule (OTH) Regensburg, Seybothstr. 2, 93053 Regensburg, Germany; (D.B.); (G.G.); (I.A.B.); (M.S.)
| | - Gašper Glavan
- East Bavarian Centre for Intelligent Materials (EBACIM), Ostbayerische Technische Hochschule (OTH) Regensburg, Seybothstr. 2, 93053 Regensburg, Germany; (D.B.); (G.G.); (I.A.B.); (M.S.)
| | - Inna A. Belyaeva
- East Bavarian Centre for Intelligent Materials (EBACIM), Ostbayerische Technische Hochschule (OTH) Regensburg, Seybothstr. 2, 93053 Regensburg, Germany; (D.B.); (G.G.); (I.A.B.); (M.S.)
| | - Luka Cmok
- Department of Complex Matter, J. Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (M.L.); (L.C.)
| | - Lucija Čoga
- Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000 Ljubljana, Slovenia; (L.Č.); (M.K.)
| | - Mitjan Kalin
- Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000 Ljubljana, Slovenia; (L.Č.); (M.K.)
| | - Mikhail Shamonin
- East Bavarian Centre for Intelligent Materials (EBACIM), Ostbayerische Technische Hochschule (OTH) Regensburg, Seybothstr. 2, 93053 Regensburg, Germany; (D.B.); (G.G.); (I.A.B.); (M.S.)
| | - Irena Drevenšek-Olenik
- Department of Complex Matter, J. Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (M.L.); (L.C.)
- Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Slovenia
- Correspondence:
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