Achieving tunability of effective electromagnetic wave absorption between the whole X-band and Ku-band via adjusting PPy loading in SiC nanowires/graphene hybrid foam

被引：135

作者：

Cheng, Yehong ^{[1
]}

Hu, Ping ^{[1
]}

Zhou, Shanbao ^{[1
]}

Yan, Liwen ^{[1
]}

Sun, Boqian ^{[1
]}

Zhang, Xinghong ^{[1
]}

Han, Wenbo ^{[1
]}

机构：

[1] Harbin Inst Technol, Natl Key Lab Sci & Technol Adv Composites Special, Harbin 150080, Heilongjiang, Peoples R China

来源：

CARBON | 2018年 / 132卷

基金：

中国国家自然科学基金;

关键词：

PERFORMANCE MICROWAVE-ABSORPTION; REDUCED GRAPHENE OXIDE; CHEMICAL-REDUCTION; CARBON NANOTUBES; BROAD-BAND; ULTRALIGHT; TEMPERATURE; MILD; COMPOSITES; BATTERIES;

D O I：

10.1016/j.carbon.2018.02.084

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：

To synthesize lightweight and high-performance electromagnetic wave absorbing composite, SiC nanowire (SiCnw) and conductive polymer polypyrrole (PPy) were incorporated in graphene aerogel (GA) via chemical vapor infiltration combined with a simple chemical polymerization method. The SiCnw/GA with filler loading of 20 wt% has an effective absorption bandwidth of 5.1 GHz in the frequency range of 8.0-13.1 GHz covering the whole X band. After coating on PPy film, the SiCnw/GA-43 wt% PPy sample has an effective absorption bandwidth of 5.9 GHz in frequency range of 12.1-18.0 GHz covering the whole Ku-band at a very thin thickness of 1.83 mm. When adjusting the PPy loading to 66 wt%, the effective absorption bandwidth of SiCnw/GA-PPy could reach a high value of 6.4 GHz in frequency of 8.2-14.6 GHz covering the whole X-band at a thin thickness of 2.32 mm. Therefore, the SiCnw/GA-PPy foams could achieve tunability of effective absorption between the whole X-band and Ku-band by adjusting the loading of PPy or SiCnws. In SiCnw/GA-PPy absorbing materials, interfacial polarization, relaxation polarization loss, electronic dipole polarization and electrons hopping are major determining factors of superior electromagnetic wave absorption properties. The SiCnw/GA-PPy foams with excellent comprehensive performance are promising candidates as electromagnetic wave absorbing materials. (c) 2018 Elsevier Ltd. All rights reserved.

引用

页码：430 / 443

页数：14

共 48 条

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