title: Synthesis and microwave absorption properties of electromagnetic functionalized Fe3O4-polyaniline hollow sphere nanocomposites produced by electrostatic self-assembly.
abstract: Highly regulated Fe3O4-polyelectrolyte-modified polyaniline (Fe3O4-PE@PANI) hollow sphere nanocomposites were successfully synthesized using an electrostatic self-assembly approach. The morphology and structure of the Fe3O4-PE@PANI nanocomposites were characterized using field-emission scanning electron microscopy, transmission electron microscopy, Fourier-transform infrared spectroscopy, X-ray powder diffraction, thermogravimetric analysis, and X-ray photoelectron spectroscopy. The results showed that the as-prepared nanocomposites had well-defined sizes and shapes, and the average size is about 500 nm. The assembly process was investigated. Magnetization measurements showed that the saturation magnetization of the nanocomposites was 38.6 emu g-1. It was also found that the Fe3O4-PE@PANI nanocomposites exhibited excellent reflection loss abilities and wide response bandwidths compared with those of PANI hollow spheres in the range 0.5-15 GHz. The Fe3O4-PE@PANI nanocomposites are, therefore, promising for microwave absorption applications.
authors.affiliation: Key Laboratory of Advanced Textile Materials and Manufacturing Technology Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, 310018 Zhejiang People's Republic of China.
authors.forename: Yao-Feng
authors.initials: YF
authors.lastname: Zhu
authors.forename: Qing-Qing
authors.initials: QQ
authors.lastname: Ni
authors.forename: Ya-Qin
authors.initials: YQ
authors.lastname: Fu
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Natsuki
keywords: Fe3O4 nanoparticles; Microwave absorption; Nanocomposite; Polyaniline hollow sphere; Polyelectrolyte