文献类型：期刊文献

英文题名：γ-Fe2O3-MWNT/poly(p-phenylenebenzobisoxazole) composites with excellent microwave absorption performance and thermal stability

作者：Chen, Yi[1];Liu, Xiaoyun[1,2];Mao, Xiaoyang[1];Zhuang, Qixin[1];Xie, Zhong[3];Han, Zhewen[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]Univ Penn, Dept Chem, Roy & Diana Vagelos Labs, Philadelphia, PA 19104 USA;[3]Harbin Engn Univ, Minist Educ, Key Lab Superlight Mat & Surface Technol, Harbin 150001, Peoples R China

年份：2014

卷号：6

期号：12

起止页码：6440

外文期刊名：NANOSCALE

收录：;EI(收录号：20142417808003);WOS:【SCI-EXPANDED(收录号:WOS:000337143900019)】；

基金：This work was financially supported by the NSFC (50973028), the SNSF (12ZR1407900), the Innovation Program of Shanghai Municipal Education Commission (12ZZ049), the Basic Innovation Research Program of Science and Technology Commission of Shanghai (13JC1402002) and the China Scholarship Council.

语种：英文

外文关键词：High resolution transmission electron microscopy - Dielectric losses - Aromatic compounds - Yarn - Hematite - Conjugated polymers

摘要：Ferromagnetic gamma-Fe2O3 nanoparticles were successfully loaded into multi-walled carbon nanotubes (MWNTs) as probed by transmission electron microscopy. Upon incorporation of the gamma-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 gamma-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% gamma-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.