Hierarchically assembled carbon microtube@SiC nanowire/Ni nanoparticle aerogel for highly efficient electromagnetic wave absorption and multifunction

被引：67

作者：

Cai, Zhixin ^{[1
]}

Su, Lei ^{[1
]}

Wang, Hongjie ^{[1
]}

Xie, Qiang ^{[1
]}

Gao, Hongfei ^{[1
]}

Niu, Min ^{[1
]}

Lu, De ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

来源：

CARBON | 2022年 / 191卷

基金：

中国国家自然科学基金;

关键词：

Aerogel; 3D hierarchically network structure; Multicomponent; Electromagnetic wave absorption; Multifunction; TUNABLE MICROWAVE-ABSORPTION; BROAD-BAND; MICROSPHERES; ENHANCEMENT; ULTRALIGHT; COMPOSITE; FOAM;

D O I：

10.1016/j.carbon.2022.01.036

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Efficient electromagnetic wave (EMW) absorption is of great significance to enjoy the service of electromagnetic wave technologies safely. Compared with powder-based EMW absorption materials, aerogels with 3D continous and highly porous network structure have demonstrated to have coordinate impedance matching and attenuation characteristics. Further introducing multicomponent to fabricate aerogels with synergetic conductive/dielectric/magnetic properties are expected to achieve efficient EMW absorption property but still remain challenging. Herein, we report the preparation and properties of a carbon microtube (as conductive network), SiC nanowires (as dielectric network), and Ni nanoparticles (as magnetic network) assembled aerogel with hierarchically network structure that is assembled by. The carbon microtube@SiC nanowire/Ni nanoparticle aerogel displays low density (similar to 5 mg/cm(3)), broad absorption bandwidth (10.1 GHz) and strong reflection loss (-51.3 dB). The unique synergistic magnetic/dielectric/conductive coupling attenuation mechanisms contribute to the good EMW absorption performance. This study opens a pathway for using 3D hierarchically network structure with conductive/dielectric/magnetic components to achieve excellent EMW absorption for promising applications. (C) 2022 Elsevier Ltd. All rights reserved.

引用

页码：227 / 235

页数：9

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