Lightweight Ti 2 CT x MXene/Poly(vinyl alcohol) Composite Foams for Electromagnetic Wave Shielding with Absorption-Dominated Feature

Lightweight Ti 2 CT x MXene/Poly(vinyl alcohol) Composite Foams for Electromagnetic Wave Shielding with Absorption-Dominated Feature

Lightweight absorption-dominated electromagnetic interference (EMI) shielding materials are more attractive than conventional reflection-dominated counterparts because they minimize the twice pollution of the reflected electromagnetic (EM) wave. Here, porous Ti CT MXene/poly(vinyl alcohol) composite...

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Veröffentlicht in:ACS applied materials & interfaces 2019-03, Vol.11 (10), p.10198-10207
Hauptverfasser: Xu, Hailong, Yin, Xiaowei, Li, Xinliang, Li, Minghang, Liang, Shuang, Zhang, Litong, Cheng, Laifei
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container_end_page 10207
container_issue 10
container_start_page 10198
container_title ACS applied materials & interfaces
container_volume 11
creator Xu, Hailong
Yin, Xiaowei
Li, Xinliang
Li, Minghang
Liang, Shuang
Zhang, Litong
Cheng, Laifei
description Lightweight absorption-dominated electromagnetic interference (EMI) shielding materials are more attractive than conventional reflection-dominated counterparts because they minimize the twice pollution of the reflected electromagnetic (EM) wave. Here, porous Ti CT MXene/poly(vinyl alcohol) composite foams constructed by few-layered Ti CT (f-Ti CT ) MXene and poly(vinyl alcohol) (PVA) are fabricated via a facile freeze-drying method. As superior EMI shielding materials, their calculated specific shielding effectiveness reaches up to 5136 dB cm g with an ultralow filler content of only 0.15 vol % and reflection effectiveness (SE ) of less than 2 dB, representing the excellent absorption-dominated shielding performance. Contrast experiment reveals that the good impedance matching derived from the multiple porous structures, internal reflection, and polarization effect (dipole and interfacial polarization) plays a synergistic role in the improved absorption efficiency and superior EMI shielding performance. Consequently, this work provides a promising MXene-based EMI shielding candidate with lightweight and high strength features.
doi_str_mv 10.1021/acsami.8b21671
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title Lightweight Ti 2 CT x MXene/Poly(vinyl alcohol) Composite Foams for Electromagnetic Wave Shielding with Absorption-Dominated Feature
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