Magnetorheological elastomers with efficient electromagnetic shielding
Magnetorheological elastomers with efficient electromagnetic shielding
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DOI：
10.1016/j.compstruct.2015.09.037
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发表时间：
2016-01-01
影响因子：
6.3
通讯作者：
Pavlinek, V.
中科院分区：
文献类型：
--
作者：
Sedlacik, M.;Mrlik, M.;Pavlinek, V.
研究了基于改性磁性颗粒的随机分布磁流变弹性体（MRE）的流变性能，并首次探讨了其电磁屏蔽性能。目前的工作进一步突出了磁性颗粒保护免受氧化物种在真实的应用条件下影响它们的必要性。制备了以有机硅弹性体和热塑性弹性体为代表的两种不同基质类型的MRE，并将原始羰基铁（Cl）颗粒和经正戊烷改性的Cl颗粒用于每种基质。改性后的磁性能差异不大，但改性后的抗酸腐蚀性能明显提高。此外，颗粒表面的改性增强了它们与有机硅弹性体基质的相容性，这通过在施加的外部磁场下的粘弹性能的测量来证明。研究还表明，所有开发的MRE都可以成功地应用于超高频波段的电磁辐射吸收，即从700 MHz到1.6 GHz的频率范围可以很容易地被这些材料覆盖。(C)2015爱思唯尔有限公司版权所有。
This study is concerned not only with an investigation of rheological performance of magnetorheological elastomers (MREs) with random distribution based on modified magnetic particles, but also discusses their electromagnetic shielding properties for the first time. The current work further highlights the necessity of magnetic particles protection against oxidation species affecting them in real application conditions. Two kinds of MREs differing in matrix type represented by silicone elastomer and thermoplastic elastomer are prepared, and pristine carbonyl iron (CI) particles and siloxane-modified Cl particles were used for each matrix. The difference in magnetic properties after the modification of particles is negligible while the modification significantly improves the anti-acid-corrosion properties. Moreover, modification of particles surface enhances their compatibility with silicone elastomer matrix which is evidenced by the measurements of viscoelastic properties under the external magnetic field applied. It is also shown that all the developed MREs can be successfully applied for the absorption of electromagnetic radiation in ultra-high frequency band, namely the frequency range from 700 MHz to 1.6 GHz can be readily covered by these materials. (C) 2015 Elsevier Ltd. All rights reserved.