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

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

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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 timeregulates 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.

PolyurethaneNanocompositesMicrocellularElectromagnetic interference shielding

Guolong Sang、Pei Xu、Tong Yan、Vignesh Murugadoss、Nithesh Naik、Yunsheng Ding、Zhanhu Guo

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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

Advanced Materials Division,Engineered Multifunctional Composites(EMC)Nanotech.LLC,Knoxville,TN 37934,USA

Integrated Composites Laboratory(ICL),Department of Chemical and Biomolecular Engineering,University of Tennessee,Knoxville,TN 37996,USA

Department of Mechanical and Manufacturing Engineering,Manipal Institute of Technology,Manipal Academy of Higher Education,Manipal,Karnataka 576104,India

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5160306051673056JZ2020YDZJ0334

2021

纳微快报(英文)
上海交通大学

纳微快报(英文)

CSCDSCIEI
ISSN：2311-6706
年,卷(期)：2021.13(10)
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