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Nano-Micro Letters · 2023 ·Vol. 15 ·期 1 ·1-16 · IF 26.6

Multifunctional MXene/C Aerogels for Enhanced Microwave Absorption and Thermal Insulation

Wu Fushuo,Hu Peiying,Hu Feiyue,Tian Zhihua,Tang Jingwen,Zhang Peigen,Pan Long,Barsoum Michel W.,Cai Longzhu,Sun ZhengMing

Curving 2D MXene into 1D nanofibers can effectively stop the restacking of MXene flakes, and then the nanofibers are used to construct a lightweight and multifunctional MXene/C aerogel. The MXene/C aerogels achieved an RL min of − 53.02 dB and EAB of 5.3 GHz. The radar cross-sectional reduction value of MXene/C aerogels can reach 12.02 dB m 2 . Integrating multiple functions such as thermal insulation, sensing, and microwave absorption into one material—MXene/C aerogel.

CAS / MDL: 7789-24-4 2052-49-5

研究领域: 材料科学 · 电磁学 · 能源与环境材料

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CHEMICAL ENGINEERING JOURNAL · 2024 · IF 13.3

Micro-helical Ni3Fe chain encapsulated in ultralight MXene/C aerogel to realize multi-functionality: Radar stealth, thermal insulation, fire resistance, and mechanical properties

Sen Lin,Jing Lin,Zhiqiang Xiong,Xue He,Xin Li,Chongbo Liu,Chengying Wang,Xiaojun Zeng,Xuliang Nie,Renchao Che

Magnetic carbon aerogels with high porosity, ultralow density, and excellent impedance matching are considered to be a promising microwave absorption (MA) material. In this study, ethylene glycol polymerization is used to assemble Ni 3 Fe particles into a micro-helical chain, which is further wrapped by MXene and then encapsulated in poly-Schiff-base aerogels through the carbonyl–amine condensation reaction. Finally, ultralight TiO 2 /Ni 3 Fe/MXene/C (NFMC) aerogels are synthesized through calcination treatment. Benefiting from the electromagnetic synergistic effect of multi-dimensional and multi-component materials, the NFMC-7 aerogel exhibits excellent MA performance with a minimum reflection loss of −61.6 dB at 3.0-mm thickness and an effective absorption bandwidth of 8.16 GHz at 2.77-mm thickness under a low filler loading of 7.6 wt%. Commercial computer simulation technology is used to verify the strong magnetic and dielectric loss characteristics of Ni 3 Fe chains. At the same time, the NFMC-7 aerogel exhibits excellent radar stealth, heat insulation, compression resistance, and fire resistance performance, which verifies its practical applicability. Overall, this work establishes an effective strategy to fabricate multi-functional magnetic aerogels, which can serve as lightweight, thin, and strong microwave absorbers with broad absorption bandwidth.

研究领域: 材料科学 · 电磁学 · 多功能材料

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Multifunctional MXene/C Aerogels for Enhanced Microwave Absorption and Thermal Insulation

Micro-helical Ni3Fe chain encapsulated in ultralight MXene/C aerogel to realize multi-functionality: Radar stealth, thermal insulation, fire resistance, and mechanical properties