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Effect of Sonication Time on Magnetorheological Effect for Monomodal Magnetic Elastomers
The effect of sonication time on the storage modulus and particle morphology for magnetic elastomers was investigated by dynamic viscoelastic measurements and morphological studies. An ultrasonic wave using a homogenizer was irradiated to magnetic liquids containing 70 wt % carbonyl iron, for up to...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6209278/ https://www.ncbi.nlm.nih.gov/pubmed/30674825 http://dx.doi.org/10.3390/gels4020049 |
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author | Watanabe, Mayuko Ikeda, Junko Takeda, Yoshihiro Kawai, Mika Mitsumata, Tetsu |
author_facet | Watanabe, Mayuko Ikeda, Junko Takeda, Yoshihiro Kawai, Mika Mitsumata, Tetsu |
author_sort | Watanabe, Mayuko |
collection | PubMed |
description | The effect of sonication time on the storage modulus and particle morphology for magnetic elastomers was investigated by dynamic viscoelastic measurements and morphological studies. An ultrasonic wave using a homogenizer was irradiated to magnetic liquids containing 70 wt % carbonyl iron, for up to 30 min before cure. SEM photographs revealed that magnetic particles were randomly dispersed in the polyurethane matrix for magnetic elastomers with sonication. A parameter showing nonlinear viscoelasticity for magnetic elastomers with sonication decreased from 0.75 to 0.4, indicating that the aggregations of magnetic particles had been destroyed by the sonication. The storage modulus at 500 mT at the linear viscoelastic regime significantly increased with the irradiation time, reaching saturation after 10 min; this suggests an increase in the number of chains of magnetic particles by sonication, due to the random dispersion of magnetic particles. At high strains, the storage modulus at 500 mT increased by 8.9 kPa by sonication, indicating the number of chains of magnetic particles which were not destroyed by increased sonication. It was also found that the storage modulus for polyurethane elastomers without magnetic particles was not varied by sonication, suggesting that the polyurethane network was not broken. The effect of sonication time on the viscoelastic properties, and on the magnetorheological response for magnetic elastomers, is discussed. |
format | Online Article Text |
id | pubmed-6209278 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-62092782019-01-17 Effect of Sonication Time on Magnetorheological Effect for Monomodal Magnetic Elastomers Watanabe, Mayuko Ikeda, Junko Takeda, Yoshihiro Kawai, Mika Mitsumata, Tetsu Gels Communication The effect of sonication time on the storage modulus and particle morphology for magnetic elastomers was investigated by dynamic viscoelastic measurements and morphological studies. An ultrasonic wave using a homogenizer was irradiated to magnetic liquids containing 70 wt % carbonyl iron, for up to 30 min before cure. SEM photographs revealed that magnetic particles were randomly dispersed in the polyurethane matrix for magnetic elastomers with sonication. A parameter showing nonlinear viscoelasticity for magnetic elastomers with sonication decreased from 0.75 to 0.4, indicating that the aggregations of magnetic particles had been destroyed by the sonication. The storage modulus at 500 mT at the linear viscoelastic regime significantly increased with the irradiation time, reaching saturation after 10 min; this suggests an increase in the number of chains of magnetic particles by sonication, due to the random dispersion of magnetic particles. At high strains, the storage modulus at 500 mT increased by 8.9 kPa by sonication, indicating the number of chains of magnetic particles which were not destroyed by increased sonication. It was also found that the storage modulus for polyurethane elastomers without magnetic particles was not varied by sonication, suggesting that the polyurethane network was not broken. The effect of sonication time on the viscoelastic properties, and on the magnetorheological response for magnetic elastomers, is discussed. MDPI 2018-05-23 /pmc/articles/PMC6209278/ /pubmed/30674825 http://dx.doi.org/10.3390/gels4020049 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Communication Watanabe, Mayuko Ikeda, Junko Takeda, Yoshihiro Kawai, Mika Mitsumata, Tetsu Effect of Sonication Time on Magnetorheological Effect for Monomodal Magnetic Elastomers |
title | Effect of Sonication Time on Magnetorheological Effect for Monomodal Magnetic Elastomers |
title_full | Effect of Sonication Time on Magnetorheological Effect for Monomodal Magnetic Elastomers |
title_fullStr | Effect of Sonication Time on Magnetorheological Effect for Monomodal Magnetic Elastomers |
title_full_unstemmed | Effect of Sonication Time on Magnetorheological Effect for Monomodal Magnetic Elastomers |
title_short | Effect of Sonication Time on Magnetorheological Effect for Monomodal Magnetic Elastomers |
title_sort | effect of sonication time on magnetorheological effect for monomodal magnetic elastomers |
topic | Communication |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6209278/ https://www.ncbi.nlm.nih.gov/pubmed/30674825 http://dx.doi.org/10.3390/gels4020049 |
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