title: γ-Fe2O3-MWNT/poly(p-phenylenebenzobisoxazole) composites with excellent microwave absorption performance and thermal stability.
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.
authors.affiliation: 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. liuxiaoyun@ecust.edu.cn qxzhuang@ecust.edu.cn.
authors.forename: Yi
authors.initials: Y
authors.lastname: Chen
authors.forename: Xiaoyun
authors.initials: X
authors.lastname: Liu
authors.forename: Xiaoyang
authors.initials: X
authors.lastname: Mao
authors.forename: Qixin
authors.initials: Q
authors.lastname: Zhuang
authors.forename: Zhong
authors.initials: Z
authors.lastname: Xie
authors.forename: Zhewen
authors.initials: Z
authors.lastname: Han