文献类型：期刊文献

英文题名：Ultrathin and flexible carbon nanotube/polymer composite films with excellent mechanical strength and electromagnetic interference shielding

作者：Wu, Guang[1];Chen, Yun[1];Zhan, Hang[1];Chen, Hai Tao[1];Lin, Jia Hao[1];Wang, Jian Nong[1];Wan, Li Qiang[2];Huang, Fa Rong[2]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2020

卷号：158

起止页码：472

外文期刊名：CARBON

收录：;EI(收录号：20194807739607);WOS:【SCI-EXPANDED(收录号:WOS:000512995800049)】；

基金：This research was supported by National Key R&D Program of China (2018YFA0208404), National Natural Science Foundation of China (U1362104), and Innovation Program of Shanghai Municipal Education Commission.

语种：英文

外文关键词：Signal interference - Nanocomposite films - Ultrathin films - Conductive films - Electromagnetic wave interference - Carbon films - Military applications - Electromagnetic pulse - Electromagnetic shielding - Tensile strength

摘要：Up till now, metals, conductive polymers and carbon materials have been widely applied in electromagnetic interference (EMI) shielding. However, EMI shielding materials that are light-weight, flexible, ultra-thin, and mechanically robust are strongly needed for many civilian and military applications. In this study, a carbon nanotube (CNT)/polymer composite film of only 1-mu m thick is prepared by continuous winding and deposition of a cylinder-like CNT assembly impregnated with a polymer solution. The in-situ impregnation leads to homogeneous mixing and strong tube-tube interfacial bonding. Further optimization of the CNT content and alignment to high levels endows the thin composite film with a high tensile strength of 1250 MPa as well as a high EMI shielding effectiveness of 30 dB in the frequency range from 1 GHz to 18 GHz. Such a combination of mechanical and shielding properties surpasses all previous observations, and thus provides a new strategy for developing novel shielding materials for wide applications. (C) 2019 Elsevier Ltd. All rights reserved.