Directional Electromagnetic Interference Shielding Based on Step-Wise Asymmetric Conductive Networks

作     者：Bai Xue Yi Li Ziling Cheng Shengdu Yang Lan Xie Shuhao Qin Qiang Zheng Bai Xue;Yi Li;Ziling Cheng;Shengdu Yang;Lan Xie;Shuhao Qin;Qiang Zheng

作者机构：Department of Polymer Materials and EngineeringCollege of Materials and MetallurgyGuizhou UniversityGuiyang 550025People’s Republic of China National Engineering Research Center for Compounding and Modification of Polymer MaterialsNational and Local Joint Engineering Research Center for Functional Polymer Membrane Materials and Membrane ProcessesGuiyang 550014People’s Republic of China College of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China College of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024People’s Republic of China 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2022年第14卷第1期

页      面：262-277页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0809[工学-电子科学与技术（可授工学、理学学位）] 0817[工学-化学工程与技术] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：Science and Technology Plan Project of Guizhou Province(No.1084 and5781) National Natural Science Foundation of China(No.51963003) The Youth Science and Technology Talent Growth Project of Guizhou Province Education Department(No.106) Outstanding Youth Program of Guizhou Province(No.20170439178) The Key project of Fundamental research in Guizhou province1Z044 Scientific Research Project of Introduced Talents of Guizhou University(No.(2017)07)are acknowledged for the financial support 

主　　题：Solution encapsulation Step-wise asymmetry Directional electromagnetic interference shielding Electrical conductivity Vacuum-assisted self-assembly 

摘      要：Some precision electronics such as signal transmitters need to not only emit effective signal but also be protected from the external electromagnetic(EM)***,directional electromagnetic interference(EMI)shielding materials(i.e.,when the EM wave is incident from different sides of the sample,the EMI shielding effectiveness(SE)is rather different)are strongly required;unfortunately,no comprehensive literature report is available on this research ***,Nicoated melamine foams(Ni@MF)were obtained by a facile electroless plating process,and multiwalled carbon nanotube(CNT)papers were prepared via a simple vacuum-assisted self-assembly ***,step-wise asymmetric poly(butylene adipate-co-terephthalate)(PBAT)composites consisting of loose Ni@MF layer and compact CNT layer were successfully fabricated via a facile solution encapsulation *** step-wise asymmetric structures and electrical conductivity endow the Ni@MF/CNT/PBAT composites with unprecedented directional EMI shielding *** the EM wave is incident from Ni@MF layer or CNT layer,Ni@MF-5/CNT-75/PBAT exhibits the total EMI SE(SET)of 38.3 and 29.5 dB,respectively,which illustrates theΔSET of 8.8 *** work opens a new research window for directional EMI shielding composites with step-wise asymmetric structures,which has promising applications in portable electronics and next-generation communication technologies.