γ-Fe2O3–MWNT/poly(p-phenylenebenzobisoxazole) composites with excellent microwave absorption performance and thermal stability

Yi Chen; Xiaoyun Liu; Xiaoyang Mao; Qixin Zhuang; Zhong Xie; Zhewen Han

doi:10.1039/C4NR00353E

γ-Fe₂O₃–MWNT/poly(p-phenylenebenzobisoxazole) composites with excellent microwave absorption performance and thermal stability†

Yi Chen,^a Xiaoyun Liu,*^ab Xiaoyang Mao,^a Qixin Zhuang,*^a Zhong Xie^c and Zhewen Han^a

* Corresponding authors

^a Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
E-mail: liuxiaoyun@ecust.edu.cn, qxzhuang@ecust.edu.cn
Tel: +86-21-64252464

^b Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA

^c Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, 145, Nantong St., Harbin, China

Abstract

Ferromagnetic γ-Fe₂O₃ nanoparticles were successfully loaded into multi-walled carbon nanotubes (MWNTs) as probed by transmission electron microscopy. Upon incorporation of the γ-Fe₂O₃–MWNTs into poly(p-phenylenebenzobisoxazole) (PBO), a conjugated polymer with high mechanical strength and outstanding thermal and oxidative stability, microwave absorbing materials were obtained. Attributed to the special structure of the γ-Fe₂O₃–MWNTs, synergistic effects on dielectric loss and magnetic loss, and a better matched characteristic impedance of the composites were achieved. The optimal minimum reflection loss reached −32.7 dB at 12.09 GHz on a composite containing 12 wt% γ-Fe₂O₃–MWNTs with a thickness of 2.7 mm, and the corresponding bandwidth below −5 dB was 6.2 GHz. This demonstrated its potential applications as a low-density microwave absorbing material operating under extreme environments.

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Article information

DOI: https://doi.org/10.1039/C4NR00353E
Article type: Communication
Submitted: 19 Jan 2014
Accepted: 10 Mar 2014
First published: 12 Mar 2014

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Nanoscale, 2014,6, 6440-6447

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γ-Fe₂O₃–MWNT/poly(p-phenylenebenzobisoxazole) composites with excellent microwave absorption performance and thermal stability

Y. Chen, X. Liu, X. Mao, Q. Zhuang, Z. Xie and Z. Han, Nanoscale, 2014, 6, 6440 DOI: 10.1039/C4NR00353E

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