Bi Song, Song Yongzhi, Hou Genliang, Li Hao, Yang Nengjun, Liu Zhaohui
304 Department, Xi'an Research Institute of High-Tech, Xi'an 710025, China.
College of Weapon Science and Technology, Xi'an Technological University, Xi'an 710025, China.
Nanomaterials (Basel). 2022 Jul 29;12(15):2622. doi: 10.3390/nano12152622.
Honeycomb (HC) composites were fabricated by impregnating an aramid paper HC core with carbon nanotubes/carbon black/reduced graphene oxide (CNTs/CB/RGO) and polyurethane resin (PU). The sandwich HC (SHC) absorber containing HC composites with superior microwave-absorption properties were fabricated using the vacuum bagging method. Through the absorption performance of the SHC absorber, it can be concluded that the triple-layer SHC absorber has the best absorbing performance. The effective bandwidth (reflection loss < 10 dB) can be achieved in the entire frequency range of 2.2−18 GHz, and the minimum RL value is −35 dB. Furthermore, the compressive stress of the triple-layer SHC absorber reached 3.71 MPa, which is similar to the compressive stress of aluminum HC panels for aviation. Benefiting from the excellent integration of absorption and mechanical performance, the SHC has significant potential in the stealth-technology field.
蜂窝（HC）复合材料是通过用碳纳米管/炭黑/还原氧化石墨烯（CNTs/CB/RGO）和聚氨酯树脂（PU）浸渍芳纶纸HC芯来制备的。采用真空袋压法制备了具有优异吸波性能的含HC复合材料的三明治HC（SHC）吸波体。通过SHC吸波体的吸收性能可以得出，三层SHC吸波体具有最佳的吸收性能。在2.2−18 GHz的整个频率范围内可实现有效带宽（反射损耗<10 dB），最小RL值为−35 dB。此外，三层SHC吸波体的压缩应力达到3.71 MPa，与航空用铝HC板的压缩应力相似。得益于吸收性能和力学性能的优异结合，SHC在隐身技术领域具有巨大潜力。
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