A flexible metamaterial based on CNTs/Cellulose aerogels for broadband and ultra-lightweight microwave absorbers

被引：8
作者：
Du, Lifei [1 ]
Li, Yuekun [1 ]
Zhou, Qian [2 ]
Shi, Tiantian [1 ]
Zhang, Liangqing [1 ]
Wang, Jiong [3 ]
Wang, Xinlei [4 ]
Fan, Xiaomeng [4 ]
机构：
[1] Xian Univ Sci & Technol, Coll Mat Sci & Engn, Xian 710054, Peoples R China
[2] Xian Univ Posts & Telecommun, Coll Sci, Xian 710121, Peoples R China
[3] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
[4] Northwestern Polytech Univ, Sci & Technol Thermostruct Composite Mat Lab, Xian 710072, Peoples R China
来源：
COMPOSITES SCIENCE AND TECHNOLOGY | 2025年 / 261卷
关键词：
Microwave absorption; Aerogel; Flexible metamaterial; Dielectric property; MICROSPHERES;
D O I：
10.1016/j.compscitech.2024.111024
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
Lightweight aerogel composites derived from biomass represent a promising candidate for electromagnetic wave absorption. In this study, the CNTs/cellulose aerogels with three-dimensional (3D) sheet-networks were prepared via the homogenous freezing method, and a two-layered meta-structure with periodic square resin shells was designed and optimized to further improve the absorbing properties of the CNTs/cellulose aerogels. The metamaterial absorber with the prepared CNTs/cellulose aerogel filling into the shells achieved ultra-broadband electromagnetic wave absorption in the frequency range of 4.36-40 GHz with a thickness of 8.5 mm (The relative bandwidth of the fabricated metamaterial absorber reached 160.7 %). Particularly, the radar crosssection properties of the curved CNTs/cellulose aerogel metamaterial absorber were investigated, revealing its application potential for conformal absorption devices, which would provide a new strategy for the design of ultra-lightweight conformal materials with broadband electromagnetic absorption materials.
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页数：8
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