Abstract 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 RLmin 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.

中文翻译：

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自模板和原位聚合策略制备具有优异微波吸收性能的轻质空心MnO2@聚苯胺核壳异质结

摘要 如今，高频电磁污染使得轻质高效吸波材料成为研究热点。本文通过自模板策略和原位聚合合理合成了空心结构的MnO2@PANI微球复合材料。在MnO2微球改性表面涂覆导电聚苯胺（PANI），不仅可以提高阻抗匹配和微波吸收能力，而且解决了纯MnO2损耗强度低、吸收带窄的缺点。导电聚合物PANI电导损失、MnO2-PANI多重界面极化和多重反射损失协同作用赋予空心MnO2@PANI微球优异的微波吸收性能。空心 MnO2@PANI 微球的 RLmin 在 8 时为 -52.06 dB。48 GHz 并具有 4.56 GHz 的宽吸收。这些积极的结果表明，由模板制备的具有多界面空心核壳结构的纯介电 MnO2@PANI 微球材料是一种轻质高效的吸收剂。