Realizing ultra-wideband absorption,desirable attenuation capa-bility at high temperature and mechanical requirements for real-life applica-tions remains a great challenge for micro wave absorbing materials.Herein,we have constructed a porous carbon fiber/polymethacrylimide(CP)structure for acquiring promising microwave absorption performance and withstanding both elevated temperature and high strength in a low density.Given the abil-ity of porous structure to induce desirable impedance matching and multiple reflection,the absorption bandwidth of CP composite can reach ultra-wideband absorption of 14 GHz at room temperature and even cover the whole X-band at 473 K.Additionally,the presence of imide ring group in polymethacrylimide and hard bubble wall endows the composite with excellent heat and compressive behaviors.Besides,the lightweight of the CP composite with a density of only 110 mg cm-3 coupled with high compressive strength of 1.05 MPa even at 453 K also satisfies the requirements in engineering applica-tions.Compared with soft and compressible aerogel materials,we envision that the rigid porous foam absorbing material is particularly suitable for environmental extremes.

Zibao Jiao;Wenjun Huyan;Feng Yang;Junru Yao;Ruiyang Tan;Ping Chen;Xuewei Tao;Zhengjun Yao;Jintang Zhou;Peijiang Liu

College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 211100,People's Republic of China;Key Laboratory of Material Preparation and Protection for Harsh Environment(Nanjing University of Aeronautics and Astronautics),Ministry of Industry and Information Technology,Nanjing 211100,People's Republic of China;School of Electronic Science and Engineering,Nanjing University,Nanjing 210023,People's Republic of China;School of Materials Science and Engineering,Nanjing Institute of Technology,Nanjing 211167,People's Republic of China

纳微快报（英文）

[1]Zibao Jiao;Wenjun Huyan;Feng Yang;Junru Yao;Ruiyang Tan;Ping Chen;Xuewei Tao;Zhengjun Yao;Jintang Zhou;Peijiang Liu-.Achieving Ultra-Wideband and Elevated Temperature Electromagnetic Wave Absorption via Constructing Lightweight Porous Rigid Structure)[J].纳微快报（英文）,2022(11):33-47

polymethacrylimide

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