Interface Engineered Microcellular Magnetic Conductive Polyurethane Nanocomposite Foams for Electromagnetic Interference Shielding  

作　　者：Guolong Sang Pei Xu Tong Yan Vignesh Murugadoss Nithesh Naik Yunsheng Ding Zhanhu Guo 

机构地区：[1]Department of Polymer Science and Engineering,School of Chemistry and Chemical Engineering,and Anhui Key Laboratory of Advanced Functional Materials and Devices,Hefei University of Technology,Hefei 230009,People’s Republic of China [2]Advanced Materials Division,Engineered Multifunctional Composites(EMC)Nanotech.LLC,Knoxville,TN 37934,USA [3]Integrated Composites Laboratory(ICL),Department of Chemical and Biomolecular Engineering,University of Tennessee,Knoxville,TN 37996,USA [4]Department of Mechanical and Manufacturing Engineering,Manipal Institute of Technology,Manipal Academy of Higher Education,Manipal,Karnataka 576104,India

出　　处：《Nano-Micro Letters》2021年第10期131-146,共16页纳微快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(51603060 and 51673056);the Industrial Guidance Fund Project of Bengbu City and Hefei University of Technology(JZ2020YDZJ0334)。

摘　　要：Lightweight microcellular polyurethane(TPU)/carbon nanotubes(CNTs)/nickel-coated CNTs(Ni@CNTs)/polymerizable ionic liquid copolymer(PIL)composite foams are prepared by non-solvent induced phase separation(NIPS).CNTs and Ni@CNTs modified by PIL provide more heterogeneous nucleation sites and inhibit the aggregation and combination of microcellular structure.Compared with TPU/CNTs,the TPU/CNTs/PIL and TPU/CNTs/Ni@CNTs/PIL composite foams with smaller microcellular structures have a high electromagnetic interference shielding effectiveness(EMI SE).The evaporate time regulates the microcellular structure,improves the conductive network of composite foams and reduces the microcellular size,which strengthens the multiple reflections of electromagnetic wave.The TPU/10CNTs/10Ni@CNTs/PIL foam exhibits slightly higher SE values(69.9 dB)compared with TPU/20CNTs/PIL foam(53.3 dB).The highest specific EMI SE of TPU/20CNTs/PIL and TPU/10CNTs/10Ni@CNTs/PIL reaches up to 187.2 and 211.5 dB/(g cm^(−3)),respectively.The polarization losses caused by interfacial polarization between TPU substrates and conductive fillers,conduction loss caused by conductive network of fillers and magnetic loss caused by Ni@CNT synergistically attenuate the microwave energy.

关 键 词：POLYURETHANE NANOCOMPOSITES MICROCELLULAR Electromagnetic interference shielding 

分 类 号：TQ328.3[化学工程—合成树脂塑料工业]