Synergistic Enhancement of Microwave Absorption Using Hybridized Polyaniline@helical CNTs with Dual Chirality

被引:200
作者
Tian, Xin [1 ]
Meng, Fanbin [1 ]
Meng, Fanchen [2 ]
Chen, Xiangnan [3 ]
Guo, Yifan [1 ]
Wang, Ying [1 ]
Zhu, Wenjun [4 ]
Zhou, Zuowan [1 ]
机构
[1] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Adv Technol Mat, Chengdu 610031, Peoples R China
[2] Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA
[3] Dalian Maritime Univ, Mat Sci & Engn, Dalian 116026, Peoples R China
[4] Kuang Chi Inst Adv Technol, State Key Lab Meta RF Electromagnet Modulat Techn, Shenzhen 518057, Peoples R China
基金
中国国家自然科学基金;
关键词
helical carbon nanotubes; polyaniline; hybridization; dual chirality; microwave absorption; LARGE-SCALE SYNTHESIS; CARBON NANOTUBES; ELECTROMAGNETIC CHARACTERISTICS; COMPOSITE; NANOCOILS; MORPHOLOGIES; NANOFIBERS; PARAMETERS; ABSORBENT; HOLLOW;
D O I
10.1021/acsami.7b02607
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
In this study, we designed a dual-chirality hierarchical structure to achieve a synergistically enhanced effect in microwave absorption via the hybridization of nanomaterials. Herein, polyaniline (PANi) nanorods with tunable chirality are grown on helical carbon nanotubes (HCNTs), a typical nanoscale chiral structure, through in situ polymerization. The experimental results show that the hierarchical hybrids (PANi@HCNTs) exhibit distinctly dual chirality and a significant enhancement in electromagnetic (EM) losses compared to those of either pure PANi or HCNTs. The maximum reflection loss of the as-prepared hybrids can reach -32.5 dB at 8.9 GHz. Further analysis demonstrates that combinations of chiral acid-doped PANi and coiled HCNTs with molecular and nanoscale chirality lead to synergistic effects resulting from the dual chirality. The so-called cross-polarization may result in additional interactions with induced EM waves in addition to multiscaled relaxations from functional groups and interfacial polarizations, which can benefit EM absorption.
引用
收藏
页码:15711 / 15718
页数:8
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