Morphologies and electromagnetic interference shielding performances of microcellular epoxy/multi-wall carbon nanotube nanocomposite foams
Morphologies and electromagnetic interference shielding performances of microcellular epoxy/multi-wall carbon nanotube nanocomposite foams
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DOI：
10.1016/j.compscitech.2016.04.003
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发表时间：
2016-06-06
影响因子：
9.1
通讯作者：
Shi, Xuetao
中科院分区：
文献类型：
--
作者：
Li, Jiantong;Zhang, Guangcheng;Shi, Xuetao
采用超临界CO2（scCO（2））间歇发泡法制备了多壁碳纳米管（MWCNTs）含量分别为0.5，1.0，2.0，3.0wt%的环氧树脂/多壁碳纳米管（EP/MWCNT）复合泡沫材料。用扫描电子显微镜（SEM）分析了EP/MWCNT复合泡沫的形貌。结果表明，微孔结构的形成和多壁碳纳米管的加入对提高EP/MWCNT复合泡沫材料的性能有协同作用。多壁碳纳米管的加入促进了微孔结构的形成，而细胞的生长反过来又诱导了多壁碳纳米管的重新分布。研究了EP/MWCNT固体复合材料和发泡复合材料的电磁屏蔽效能。结果表明，在MWCNT含量为1.0重量%时，发泡将比EMI SE从5.2提高到21.3 dB cm（3）/g。多壁碳纳米管和微孔结构的引入协同增强了环氧基复合材料的EMI屏蔽性能。(C)2016爱思唯尔有限公司版权所有
Microcellular epoxy/multi-wall carbon nanotube (EP/MWCNT) composite foams loaded with 0.5,1.0, 2.0 and 3.0 wt% of multi-walled carbon nanotubes (MWCNTs) were prepared by a batch foaming process with supercritical carbon dioxide (scCO(2)). The morphologies of EP/MWCNT composite foams were analyzed by scanning electron microscopy (SEM). It was found that there was a synergic effect between the formation of microcellular structure and the addition of MWCNTs on improving the performances of EP/MWCNT composite foams. The addition of MWCNTs promoted the formation of microcellular structure, and the growth of cells in turn induced the redistribution of MWCNTs. Furthermore, the electromagnetic interference (EMI) shielding effectiveness (SE) of EP/MWCNT solid and foamed composites was investigated. The results indicated that the foaming improved the specific EMI SE from 5.2 to 21.3 dB cm(3)/g at the MWCNT content of 1.0 wt%. The introduction of MWCNTs and microcellular structure synergistically enhanced the EMI shielding performance of epoxy-based composites. (C) 2016 Elsevier Ltd. All rights reserved.