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首页> 美国卫生研究院文献>Materials >Decorating MOF-Derived Nanoporous Co/C in Chain-Like Polypyrrole (PPy) Aerogel: A Lightweight Material with Excellent Electromagnetic Absorption
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Decorating MOF-Derived Nanoporous Co/C in Chain-Like Polypyrrole (PPy) Aerogel: A Lightweight Material with Excellent Electromagnetic Absorption

机译：在链状聚吡咯（PPy）气凝胶中修饰MOF衍生的纳米孔Co / C：具有出色电磁吸收性能的轻质材料

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To clear away the harmful effects of the increment of electromagnetic pollution, high performance absorbers with appropriate impedance matching and strong attenuation capacity are strongly desired. In this study, a chain-like PPy aerogel decorated with MOF-derived nanoporous Co/C (Co/C@PPy) has been successfully prepared by a self-assembled polymerization method. With a filler loading ratio of 10 wt %, the composite of Co/C@PPy could achieve a promising electromagnetic absorption performance both in intensity and bandwidth. An optimal reflection loss value of −44.76 dB is achieved, and the effective bandwidth (reflection loss lower than −10 dB) is as large as 6.56 GHz. Furthermore, a composite only loaded with 5 wt % Co/C@PPy also achieves an effective bandwidth of 5.20 GHz, which is even better than numerous reported electromagnetic absorption (EA) materials. The result reveals that the as-fabricated Co/C@PPy—with high absorption intensity, broad bandwidth, and light weight properties—can be utilized as a competitive absorber.
机译：为了消除电磁污染增加的有害影响，强烈需要具有适当阻抗匹配和强大衰减能力的高性能吸收器。在这项研究中，通过自组装聚合方法成功地制备了由MOF衍生的纳米孔Co / C（Co / C @ PPy）装饰的链状PPy气凝胶。填料填充率为10 wt％时，Co / C @ PPy的复合材料在强度和带宽上都可以实现有希望的电磁吸收性能。最佳反射损耗值为-44.76 dB，有效带宽（反射损耗低于-10 dB）大至6.56 GHz。此外，仅加载5 wt％Co / C @ PPy的复合材料也可达到5.20 GHz的有效带宽，甚至比许多报道的电磁吸收（EA）材料还要好。结果表明，所制备的具有高吸收强度，宽带宽和轻质特性的Co / C @ PPy可以用作竞争性吸收剂。

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