Miao Zhen, Chen Xiaohong, Zhou Honglei, Liu Ping, Fu Shaoli, Yang Jiajie, Gao Yuhang, Ren Yupeng, Rong Dong
School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200000, China.
Nanomaterials (Basel). 2021 Dec 22;12(1):20. doi: 10.3390/nano12010020.
A unique self-standing membrane composed of hierarchical thermoplastic polyurethane (TPU)/polyacrylonitrile (PAN) fibers is prepared by the electrospinning technique, followed by a simple dip-coating process. FeO nanoparticles are uniformly anchored on TPU/PAN fibers during the electrospinning process, enabling the membrane to achieve effective electromagnetic interference shielding (EMI SE) performance. Such a hybrid membrane has a high magnetization of 18.9 emu/g. When MXene (TiCT) layers are further loaded on the TPU/PAN/FeONPs hybrid membrane, its EMI SE performance in the X band can exceed 30 dB due to the hydrogen bonds generated between the macromolecular chain of PAN and the functional group (T) on the surface of MXene. Simultaneously, the interfacial attraction between MXene and the TPU/PAN/FeONPs substrate is enhanced. The EMI SE mechanism of the hybrid membrane indicates that this film has great potential in the fields of wearable devices and flexible materials.
通过静电纺丝技术制备了一种由分级热塑性聚氨酯（TPU）/聚丙烯腈（PAN）纤维组成的独特自立膜，随后进行简单的浸涂工艺。在静电纺丝过程中，FeO纳米颗粒均匀地锚定在TPU/PAN纤维上，使该膜能够实现有效的电磁干扰屏蔽（EMI SE）性能。这种混合膜具有18.9 emu/g的高磁化强度。当将MXene（TiCT）层进一步负载在TPU/PAN/FeONPs混合膜上时，由于PAN大分子链与MXene表面的官能团（T）之间产生的氢键，其在X波段的EMI SE性能可超过30 dB。同时，MXene与TPU/PAN/FeONPs基底之间的界面吸引力增强。混合膜的EMI SE机制表明，这种薄膜在可穿戴设备和柔性材料领域具有巨大潜力。
