Hierarchical core/shell bamboo-like polypyrrole nanofibers/Fe3O4 hybrids with superior microwave absorption performance. Issue 12 (2nd December 2019)

• Record Type: Journal Article
• Authors: Zhan, Yingqing; Zhao, Rui; Xiang, Xia; He, Shuangjiang; Zhao, Shumei; Xue, Weidong
• Is Part Of: Composite interfaces. Volume 26:Issue 12(2019)
• Page Start: 1087
• Page End: 1100
• Publication Date: 2019-12-02
• Subjects: Core/shell structure -- bamboo-like PPy nanofiber -- Fe3O4 -- hybrid -- microwave absorption performance; Composite materials -- Periodicals; 620.11805
• DOI: 10.1080/09276440.2019.1586043
• Languages: English
• ISSNs: 0927-6440

Abstract

ABSTRACT: Design and fabrication of structurally optimized microwave absorbing materials are important for eliminating electromagnetic (EM) pollution. Herein, we reported the novel highly regulated core/shell bamboo-like polypyrrole (PPy) nanofibers/Fe3 O4 hybrids as the efficient microwave absorbing materials. Typically, the target hybrid materials were prepared by a two-step method, including synthesis of bamboo-like PPy nanofibers using vapor polymerization of PPy on tubular vanadium pentoxide templates and coprecipitation of Fe3 O4 nanoparticles on the surface of bamboo-like PPy nanofibers. Owing to good impedance matching and hierarchical structure, as-prepared core/shell bamboo-like PPy nanofibers/Fe3 O4 hybrids exhibit superior microwave absorption and broad absorption bandwidths compared with conventional PPy/Fe3 O4 composites. The lowest reflection loss of core/shell bamboo-like PPy nanofibers/Fe3 O4 hybrid is calculated to be −41.6 dB at 10.0 GHz with the thickness of 2.5 mm. Furthermore, the absorption bandwidths exceeding −10 dB are more than 8.0 GHz with thickness of 2.0–3.5 mm. Therefore, this work provides an efficient way to obtain high-performance microwave absorber with lightweight, strong absorption and wide absorption bandwidths. Graphical Abstract: