Advanced Fiber Materials ( IF 17.2 ) Pub Date : 2022-05-11 , DOI: 10.1007/s42765-022-00157-4 Xihua Wang 1 , Jin Cui 1 , Ye Yuan 1, 2 , Jing Qin 3 , Li Huang 4 , Yibin Li 2
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Composite fabrics with excellent microwave absorbing performance are highly desired. Herein, reduced graphene oxide/carbon nanofiber (rGO/CNF) based composite fabrics with spider web-like structure were successfully synthesized by electrostatic spinning technique. The spider web-like structure in the composite fabrics provides a connected network for efficient conductive loss of microwave energies. Magnetic loss benefits from the deposited nickel nanoparticles (Ni NPs) anchored in the carbon nanofibers. Meanwhile, the deposited thin polypyrrole (PPy) layers on the conductive network acts as a protective layer for Ni NPs as well as provides abundant interfaces for dissipating electromagnetic energies, which endow the composite fabrics stable microwave absorbing performance. Due to the synergistic effect of microwave absorbing mechanism, the maximum reflection loss (RLmax) of the composite fabric at 6.72 GHz is − 46.15 dB, and the effective absorption bandwidth (EAB) is as wide as 8.63 GHz (from 9.37 to 18 GHz). What's more, favorable mechanical and heat insulation properties of the composite fabrics reveal its multifunctional advantages. This rGO/CNF based composite fabric demonstrates a new direction for multifunctional and flexible microwave absorbing materials (MAMs).
Graphical abstract
中文翻译：
用于微波吸收应用的具有蜘蛛网状结构的还原氧化石墨烯/碳纳米纤维基复合织物
非常需要具有优异的微波吸收性能的复合织物。在此，通过静电纺丝技术成功合成了具有蜘蛛网状结构的还原氧化石墨烯/碳纳米纤维（rGO/CNF）基复合织物。复合织物中的蜘蛛网状结构为微波能量的有效传导损耗提供了连接网络。磁性损失得益于锚定在碳纳米纤维中的沉积镍纳米粒子 (Ni NPs)。同时，在导电网络上沉积的薄聚吡咯（PPy）层可作为镍纳米粒子的保护层，并为耗散电磁能提供丰富的界面，从而赋予复合织物稳定的微波吸收性能。由于微波吸收机制的协同作用，6.72 GHz 时复合织物的最大) 为 − 46.15 dB，有效吸收带宽 (EAB) 宽至 8.63 GHz（从 9.37 到 18 GHz）。更重要的是，复合织物良好的机械性能和隔热性能显示出其多功能优势。这种基于 rGO/CNF 的复合织物展示了多功能和柔性微波吸收材料 (MAM) 的新方向。
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