Li Yuhong, Wang Yang, Li Zhuo, Ma Suping, Zhang Yawen, Fan Fei, Huang Yi
School of Materials Science and Engineering (National Institute for Advanced Materials), Key Laboratory of Functional Polymer Materials, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300350, P. R. China.
Institute of Modern Optics, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Nankai University, Tianjin, 300350, P. R. China.
Adv Mater. 2025 Apr;37(15):e2501485. doi: 10.1002/adma.202501485. Epub 2025 Mar 4.
The rapid development of wireless communication and infrared (IR) detection technologies has generated an increasing demand for large-size high-performance wearable electromagnetic interference (EMI) shielding and IR stealth textiles. Herein, meter-scale MXene/graphene oxide (MG)@monstera nanocellulose (MC) core-shell nanofiber textiles are fabricated for the first time using a multi-stage cryogenic drying-assisted coaxial wet spinning assembly strategy, with MG as the conductive composite core and MC as the organic skeleton shell. The highly aligned shell and dense core endow the nanofibers with a great toughness of ≈39.6 MJ m, a strong strength >≈180 MPa, and a high conductivity of 6.4 × 10 S m. The textiles exhibit unprecedented ultra-broadband EMI shielding performance covering gigahertz and terahertz bands, with optimal shielding effectiveness up to 84 and 85 dB in the band of 8.2-26.5 GHz and 0.3-1.5 THz, respectively, at only 185 µm thick. Superb IR stealth performance in the near- and mid-IR ranges is also achieved, benefitting from their good heat resistance and low IR emissivity. Furthermore, the textiles also demonstrate excellent dyeability, flame retardancy, Joule heating, and stress-sensing properties. Such scalable prepared core-shell nanofiber textiles with superior comprehensive performance have broad application prospects in future smart wearable protective devices.
无线通信和红外（IR）探测技术的快速发展，对大尺寸高性能可穿戴电磁干扰（EMI）屏蔽和红外隐身纺织品的需求日益增长。在此，首次采用多阶段低温干燥辅助同轴湿法纺丝组装策略制备了米级的MXene/氧化石墨烯（MG）@龟背竹纳米纤维素（MC）核壳纳米纤维纺织品，其中MG作为导电复合芯，MC作为有机骨架壳。高度排列的壳层和致密的芯层赋予纳米纤维约39.6 MJ m的高韧性、>≈180 MPa的高强度以及6.4×10 S m的高电导率。该纺织品展现出前所未有的超宽带EMI屏蔽性能，覆盖吉赫兹和太赫兹频段，在仅185 µm厚时，在8.2 - 26.5 GHz频段和0.3 - 1.5 THz频段的最佳屏蔽效能分别高达84 dB和85 dB。由于其良好的耐热性和低红外发射率，在近红外和中红外范围内也实现了出色的红外隐身性能。此外，该纺织品还表现出优异的可染性、阻燃性、焦耳热和应力传感性能。这种可规模化制备的具有卓越综合性能的核壳纳米纤维纺织品在未来智能可穿戴防护设备中具有广阔的应用前景。
