期刊
APPLIED SURFACE SCIENCE
卷 537, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2020.147857
关键词
Self-template; MnO2; Multi-interface; Microwave absorption
类别
资金
- National Natural Science Foundation of China [51477002, 51707003]
- University Synergy Innovation Program of Anhui Province [GXXT-2019-028]
The hollow structure MnO2@PANI microsphere composite synthesized in this study exhibits excellent microwave absorption performance with a wide absorption bandwidth, showcasing the potential of lightweight and efficient absorption materials for high-frequency electromagnetic pollution.
Nowadays, high-frequency electromagnetic pollution makes the lightweight and high-efficiency absorption materials become the research hotspot. In this paper, the hollow structure MnO2@PANI microsphere composite was reasonably synthesized by self-template strategy and in-situ polymerization. Coating conductive polyaniline (PANI) on the modified surfaces of MnO2 microsphere not only can improve the impedance matching and microwave absorption ability, but also solve the drawback of low loss intensity as well as narrow absorption band of pure MnO2. The conductive polymer PANI conductance loss, MnO2-PANI multiple interfacial polarization and multiple reflection loss synergy endows hollow MnO2@PANI microsphere excellent microwave absorption performance. The RLm, of hollow MnO2@PANI microsphere is 52.06 dB at 8.48 GHz and has a wide absorption of 4.56 GHz. Those positive results show that the pure dielectric MnO2@PANI microsphere material with a multi-interface hollow core-shell structure prepared from a template is a lightweight and efficient absorbent.
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