Hyperelastic,Robust, Fire-Safe Multifunctional MXene Aerogels with Unprecedented Electromagnetic Interference Shielding Efficiency |
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| Authors: | Hengrui Wang Yue Jiang Zhewen Ma Yongqian Shi Yanjun Zhu Ruizhe Huang Yuezhan Feng Zubin Wang Min Hong Jiefeng Gao Long-Cheng Tang Pingan Song |
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| Affiliation: | 1. College of Environment and Safety Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou, 350116 China;2. China-Australia Institute for Advanced Materials and Manufacturing, Jiaxing University, Jiaxing, 314001 China;3. Department of Inorganic Materials, School of Materials Science and Engineering, Tongji University, Shanghai, 201804 China;4. Key Laboratory of Materials Processing and Mold Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002 China;5. Institute of Safety Science and Engineering, School of Mechanical and Automotive Engineering, South China University of Technology, Wushan Road 381, Guangzhou, 510641 China;6. Centre for Future Materials, University of Southern Queensland, Springfield, 4300 Australia;7. School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 China;8. Key Laboratory of Organosilicon Chemistry and Material Technology of MoE, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, 311121 China |
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| Abstract: | MXene aerogels have shown great potential for many important functional applications, in particular electromagnetic interference (EMI) shielding. However, it has been a grand challenge to create mechanically hyperelastic, air-stable, and durable MXene aerogels for enabling effective EMI protection at low concentrations due to the difficulties in achieving tailorable porous structures, excellent mechanical elasticity, and desired antioxidation capabilities of MXene in air. Here, a facile strategy for fabricating MXene composite aerogels by co-assembling MXene and cellulose nanofibers during freeze-drying followed by surface encapsulation with fire-retardant thermoplastic polyurethane (TPU) is reported. Because of the maximum utilization of pore structures of MXene, and conductive loss enhanced by multiple internal reflections, as-prepared aerogel with 3.14 wt% of MXene exhibits an exceptionally high EMI shielding effectiveness of 93.5 dB, and an ultra-high MXene utilization efficiency of 2977.71 dB g g?1, tripling the values in previous works. Owing to the presence of multiple hydrogen bonding and the TPU elastomer, the aerogel exhibits a hyperelastic feature with additional strength, excellent stability, superior durability, and high fire safety. This study provides a facile strategy for creating multifunctional aerogels with great potential for applications in EMI protection, wearable devices, thermal management, pressure sensing, and intelligent fire monitoring. |
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| Keywords: | electromagnetic interference shielding efficiency hyperelasticity mechanical robustness multifunction MXenes |
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