Trunk‑Inspired SWCNT‑Based Wrinkled Films for Highly‑Stretchable Electromagnetic Interference Shielding and Wearable Thermotherapy  

作　　者：Xiaofeng Gong Tianjiao Hu You Zhang Yanan Zeng Ye Zhang Zhenhua Jiang Yinlong Tan Yanhong Zou Jing Wang Jiayu Dai Zengyong Chu 

机构地区：[1]College of Science,National University of Defense Technology,Changsha 410073,People’s Republic of China [2]Beijing Interdisciplinary Research Center,National University of Defense Technology,Changsha 410073,People’s Republic of China [3]School of Physics and Electronics,Hunan University,Changsha 410082,People’s Republic of China

出　　处：《Nano-Micro Letters》2024年第11期429-444,共16页纳微快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(52073302,52103311);Hunan Provincial Natural Science Foundation for Distinguished Young Scholars(No.14JJ1001).

摘　　要：Nowadays,the increasing electromagnetic waves generated by wearable devices are becoming an emerging issue for human health,so stretchable electromagnetic interference(EMI)shielding materials are highly demanded.Elephant trunks are capable of grabbing fragile vegetation and tearing trees thanks not only to their muscles but also to their folded skins.Inspired by the wrinkled skin of the elephant trunks,herein,we propose a winkled conductive film based on single-walled carbon nanotubes(SWCNTs)for multifunctional EMI applications.The conductive film has a sandwich structure,which was prepared by coating SWCNTs on both sides of the stretched elastic latex cylindrical substrate.The shrinking-induced winkled conductive network could withstand up to 200%tensile strain.Typically,when the stretching direction is parallel to the polarization direction of the electric field,the total EMI shielding effectiveness could surprisingly increase from 38.4 to 52.7 dB at 200%tensile strain.It is mainly contributed by the increased connection of the SWCNTs.In addition,the film also has good Joule heating performance at several voltages,capable of releasing pains in injured joints.This unique property makes it possible for strain-adjustable multifunctional EMI shielding and wearable thermotherapy applications.

关 键 词：Electromagnetic interference shielding Single-walled carbon nanotubes WRINKLES STRETCHABLE THERMOTHERAPY 

分 类 号：TB383.2[一般工业技术—材料科学与工程] TN03[电子电信—物理电子学]