Wang Jie, Ma Xiaoyan, Zhou Jiale, Du Fanglin, Teng Chao
College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
ACS Nano. 2022 Apr 26;16(4):6700-6711. doi: 10.1021/acsnano.2c01323. Epub 2022 Mar 25.
High-strength, flexible, and multifunctional characteristics are highly desirable for electromagnetic interference (EMI) shielding materials in the field of electric devices. In this work, inspired by natural nacre, we fabricated large-scale, layered MXene/amarid nanofiber (ANF) nanocomposite papers by blade-coating process plus sol-gel conversion step. The as-synthesized papers possess excellent mechanical performance, that is, exceptional tensile strength (198.80 ± 5.35 MPa), large strain (15.30 ± 1.01%), and good flexibility (folded into various models without fracture), which are ascribed to synergetic interactions of the interconnected three-dimensional network frame and hydrogen bonds between MXene and ANF. More importantly, the papers with extensive continuous conductive paths formed by MXene nanosheets present a high EMI shielding effectiveness of 13188.2 dB cm g in the frequency range of 8.2-12.4 GHz. More interestingly, the papers show excellent Joule heating performance with a fast thermal response (<10 s) and a low driving voltage (≤4 V). As such, the large-scale MXene/ANF papers are considered as promising alternatives in a wide range of applications in electromagnetic shielding and thermal management.
在电子设备领域，电磁干扰（EMI）屏蔽材料非常需要具备高强度、柔韧性和多功能特性。在这项工作中，受天然珍珠母启发，我们通过刮涂工艺加溶胶 - 凝胶转化步骤制备了大规模的层状MXene/芳纶纳米纤维（ANF）纳米复合纸。所制备的纸具有优异的机械性能，即出色的拉伸强度（198.80±5.35MPa）、大应变（15.30±1.01%）和良好的柔韧性（可折叠成各种形状而不破裂），这归因于相互连接的三维网络框架以及MXene与ANF之间氢键的协同相互作用。更重要的是，由MXene纳米片形成广泛连续导电路径的纸在8.2 - 12.4GHz频率范围内呈现出13188.2dB cm g的高电磁干扰屏蔽效能。更有趣的是，这些纸表现出优异的焦耳热性能，具有快速的热响应（<10s）和低驱动电压（≤4V）。因此，大规模的MXene/ANF纸被认为是电磁屏蔽和热管理广泛应用中很有前景的替代品。
