Highly flexible microwave shielding E (2‐3 GHz), F (3‐4 GHz), I (8‐12 GHz) and J (12‐16 GHz) natural rubber composites for antenna application were prepared and characterized. The main objective of this current research is to develop a flexible microwave shielding material to reduce electromagnetic inference (EMI) effect. Graphene nanoplatelet and cobalt nanowire was selected for improving electric and magnetic losses. The flexible rubber composite was prepared using two‐roll mill process and cured at an temperature of 150^οC. The mechanical, dielectric, magnetic, and microwave shielding properties were tested in accordance to ASTM standards. Highest tensile strength of 30 MPa was obtained for composite made of 6phr (parts per hundred rubber) of graphene nanoplatelet and cobalt nanowire (NR₄). Dielectric results show that the composite consists of graphene nanoplatelet and cobalt nanowire of 6phr gives highest dielectric constant of 7.2. The hysteresis analysis shows a highest magnetization of 940 emu, remanence of 610 emu and coercivity of 2750G for NR₄ composite. Similarly, the maximum microwave attenuation of 38.1 dB at 18 GHz (J band) was achieved in NR₄ composite. This high microwave shielding flexible composite material could be used as EMI filter and electromagnetic absorber in antennae applications where EMI need to be lesser.

中文翻译：

---

钴纳米线和石墨烯纳米片对天然橡胶复合材料高频段微波屏蔽性能的作用

制备并表征了用于天线的高弹性微波屏蔽E（2-3 GHz），F（3-4 GHz），I（8-12 GHz）和J（12-16 GHz）天然橡胶复合材料。这项当前研究的主要目的是开发一种柔性的微波屏蔽材料，以减少电磁干扰（EMI）效应。选择石墨烯纳米片和钴纳米线来改善电和磁损耗。柔性橡胶复合材料用双辊磨方法制备和在150的温度下固化^ο的机械，电介质，磁性和微波屏蔽性能按照到ASTM标准进行试验C.。由6phr（每百份橡胶的份数）的石墨烯纳米片和钴纳米线（NR ₄）制成的复合材料的最高拉伸强度为30 MPa。）。介电结果表明，由石墨烯纳米片和6phr钴纳米线组成的复合材料的最高介电常数为7.2。磁滞分析表明，对于NR ₄复合材料，最高磁化强度为940 emu，剩磁为610 emu，矫顽力为2750G 。同样，在NR ₄复合材料中，在18 GHz（J波段）处实现了38.1 dB的最大微波衰减。这种高微波屏蔽柔性复合材料可在需要降低EMI的天线应用中用作EMI滤波器和电磁吸收器。