Abstract In this work, a novel nanocomposite composed of silica nanoparticles wrapped with a poly(aniline-co-pyrrole) copolymer and reduced graphene oxide (P(ANi-co-Py)/RGO@SiO2) was prepared by an in situ pre-polymerization method and then characterized. The aniline:pyrrole molar ratio was 1:3 and the pre-polymerization time was 30 min before the in situ polymerization of the copolymer nanocomposites occurred. The results revealed that the microwave absorbing performance of the copolymer nanocomposites was significantly improved compared to that of the component homopolymer nanocomposites. The minimum reflection loss of P(ANi-co-Py)/RGO@SiO2, PANi/RGO@SiO2, and PPy/RGO@SiO2 was −40.6, −38.9, and −13.9 dB, respectively. The effective absorption bandwidth of P(ANi-co-Py)/RGO@SiO2 was 5.5 GHz from 12.3 to 17.8 GHz. In contrast, the effective absorption bandwidth of a component homopolymer nanocomposite, such as PANi/RGO@SiO2, was 2.2 GHz (15.8–18 GHz), and for PPy/RGO@SiO2, was only 1.5 GHz (12.4–13 GHz and 16.7–17.6 GHz) in Ku band. The enhanced microwave absorption was mainly contributed to the interfacial polarization in which the interfacial interaction between SiO2 particles, rGO sheets and conducting polymer chains played critical roles.

中文翻译：

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用聚（苯胺-共-吡咯）和还原氧化石墨烯包裹的二氧化硅颗粒用于高级微波吸收

摘要 在这项工作中，通过原位预制法制备了一种新型纳米复合材料，由二氧化硅纳米颗粒包裹聚（苯胺-共-吡咯）共聚物和还原氧化石墨烯（P（ANi-co-Py）/RGO@SiO2）。聚合方法，然后表征。在共聚物纳米复合材料的原位聚合发生之前，苯胺:吡咯摩尔比为 1:3，预聚合时间为 30 分钟。结果表明，与组分均聚物纳米复合材料相比，共聚物纳米复合材料的吸波性能显着提高。P(ANi-co-Py)/RGO@SiO2、PANi/RGO@SiO2和PPy/RGO@SiO2的最小反射损耗分别为-40.6、-38.9和-13.9 dB。P(ANi-co-Py)/RGO@SiO2 的有效吸收带宽从 12.3 到 17.8 GHz 为 5.5 GHz。相比之下，组分均聚物纳米复合材料（如PANi/RGO@SiO2）的有效吸收带宽为2.2 GHz（15.8-18 GHz），而PPy/RGO@SiO2的有效吸收带宽仅为1.5 GHz（12.4-13 GHz和16.7-17.6 GHz） ) 在 Ku 波段。增强的微波吸收主要有助于界面极化，其中 SiO2 颗粒、rGO 片和导电聚合物链之间的界面相互作用起关键作用。