Comparative study on solid and hollow glass microspheres for enhanced electromagnetic interference shielding in polydimethylsiloxane/multi-walled carbon nanotube composites
Comparative study on solid and hollow glass microspheres for enhanced electromagnetic interference shielding in polydimethylsiloxane/multi-walled carbon nanotube composites
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DOI：
10.1016/j.compositesb.2019.107378
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发表时间：
2019-11
期刊：
影响因子：
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通讯作者：
Yan-Jun Tan;Jie Li;Jie-Hua Cai;Xiao-hong Tang;Jihui Liu;Zong-qian Hu;Ming Wang
中科院分区：
文献类型：
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作者：
Yan-Jun Tan;Jie Li;Jie-Hua Cai;Xiao-hong Tang;Jihui Liu;Zong-qian Hu;Ming Wang
本文通过在聚二甲基硅氧烷/多壁碳纳米管（PDMS/MWCNT）复合材料中加入实心和空心玻璃微球（SGM和HGM）来诱导多界面。通过在GM与PDMS/MWCNT相界面处的多次反射和/或散射，PDMS/MWCNT复合材料的电磁干扰（EMI）屏蔽被显著增强。通过添加30vol%SGM和HGM，具有3.0vol%MWCNT填料的PDMS/MWCNT复合材料的EMI屏蔽效能（SE）分别从~40增加到~52 dB和~46 dB。由于含HGM的复合材料的密度较低，因此具有较高的比SE值。研究了SGM粒径、含量、MWCNT含量以及样品厚度对PDMS/MWCNT/SGM复合材料电磁屏蔽效应的影响。通过平衡导电层的厚度和多次反射和/或散射界面的数量，在复合材料中实现了高性能的EMI SE。
Herein, solid and hollow glass microspheres (SGM and HGM) were added into polydimethylsiloxane/multi-walled carbon nanotube (PDMS/MWCNT) composites to induce multiple interfaces. The electromagnetic interference (EMI) shielding of the PDMS/MWCNT composites was expectedly enhanced by the multiple reflection and/or scattering at the interfaces between GM and PDMS/MWCNT phase. The EMI shielding effectiveness (SE) of the PDMS/MWCNT composites with 3.0 vol% MWCNT fillers increased from ~40 to ~52 dB and ~46 dB by the addition of 30 vol% SGM and HGM, respectively. The high specific SE value was found in the composites with HGM due to the low density of the samples with HGM. The effect of the diameter and the content of SGM, the content of MWCNT, and the sample thickness on EMI SE of the PDMS/MWCNT/SGM composites were investigated in this work. The high-performance EMI SE were achieved in the composites by balancing the thickness of conductive layers and the amount of multiple reflection and/or scattering interfaces.