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利用简单的低温聚合方法合成了聚吡咯纳米线/石墨烯(PPy/G)纳米复合材料,它们可以作为轻质的电磁波吸收剂.扫描电镜图表明,PPy纳米线的长度为数微米,与石墨烯之间存在较好的接触界面.该复合材料在厚度2.0–5.0?mm范围内,所有的最小反射损耗值均低于–20.0dB.例如,当复合材料的厚度为3.0?mm、频率为11.28GHz时,最小的反射损耗为–38.9dB;当厚度为3.5?mm、频率为9.36GHz时,最小的反射损耗为–39.1dB,远优于PPy纳米线和之前报道的石墨烯复合材料.此外,PPy/G纳米复合材料在基质中的添加量仅为5wt%,低于之前报道的石墨烯复合纳米材料.这种增强的电磁波吸收特性可以由复合材料间的界面极化以及1/4波长匹配模型来解释.本文的研究结果可以为轻质电磁波吸收材料的实际应用提供参考.
Polypyrrole nanowires / graphene (PPy / G) nanocomposites were synthesized by a simple low temperature polymerization method, which can be used as lightweight electromagnetic wave absorbers. Scanning electron micrographs show that PPy nanowires are several microns in length, Have a good contact interface between the composite material in the thickness of 2.0-5.0? Mm range, all the minimum reflection loss values ?? are less than -20.0dB.For example, when the composite thickness of 3.0? Mm, the frequency of 11.28 GHz, the minimum reflection loss is -38.9dB; when the thickness is 3.5? Mm and the frequency is 9.36GHz, the minimum reflection loss is -39.1dB, much better than the PPy nanowire and the previously reported graphene composite. , PPy / G nanocomposites were added to the matrix only at 5wt% lower than the previously reported graphene nanocomposites.This enhanced electromagnetic wave absorption properties can be attributed to the interfacial polarization between the composites and the quarter wavelength Matching model to explain.The results of this paper can provide a reference for the practical application of lightweight electromagnetic wave absorbing materials.