Dual-functional carbonized loofah@GNSs-CNTs reinforced by cyanate ester composite with highly efficient electromagnetic interference shielding and thermal management
Dual-functional carbonized loofah@GNSs-CNTs reinforced by cyanate ester composite with highly efficient electromagnetic interference shielding and thermal management
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DOI：
10.1016/j.compositesb.2021.109132
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发表时间：
2021-10
影响因子：
13.1
通讯作者：
Zeshun Zong;Fang Ren;Zhengzheng Guo;Zhenxia Lu;Yanling Jin;Yuchen Zhao;Penggang Ren
中科院分区：
文献类型：
--
作者：
Zeshun Zong;Fang Ren;Zhengzheng Guo;Zhenxia Lu;Yanling Jin;Yuchen Zhao;Penggang Ren
利用天然无污染的原材料研制吸收型电磁屏蔽复合材料具有重要意义。采用高温碳化和变温固化工艺，制备了一种新型丝瓜络@石墨烯纳米片（GNSs）-碳纳米管（CNTs）/环氧树脂改性氰酸酯（CL@GC/CE）复合材料，该复合材料具有基于吸收的电磁干扰屏蔽性能。所制备的复合材料呈现出良好的电导率为32.66 S/cm，优异的EMI屏蔽效率为35.57 dB，结合高吸收系数为0.58。CL@GC/CE复合材料具有优异的吸波性能和电磁屏蔽性能的主要原因是丝瓜络海绵与三维导电骨架良好的阻抗匹配性能，以及导电骨架与GNSs-CNTs之间的多次反射散射和界面极化效应。低成本的生物质碳复合材料具有优异的综合性能，在通信和航空航天等领域具有很好的电磁屏蔽应用前景。
Using natural non-polluting raw materials to develop absorption-based electromagnetic interference shielding composites is significantly desirable. Herein, a novel kind of carbonized loofah@graphene nanosheets (GNSs)-carbon nanotubes (CNTs)/epoxy resin modified cyanate ester (CL@GC/CE) composites were successfully prepared through high-temperature carbonization and variable temperature curing process, which show the absorption-based electromagnetic interference (EMI) shielding performance. The as-prepared composites present a favorable electrical conductivity of 32.66 S/cm, exceptional EMI shielding efficiency of 35.57 dB in conjunction with a high absorption coefficient of 0.58. The main reasons for the excellent absorption capacity and EMI shielding performance of the CL@GC/CE composites are the good impedance matching performance of carbonized loofah sponge with a 3D conductive framework, and the multiple reflection scattering and interface polarization effect between the conductive framework and GNSs-CNTs. In view of the remarkable comprehensive properties, the low-cost biomass-derived carbon composites are highly promising materials for practical EMI shielding applications in the fields of telecommunication and aerospace.