Abstract Carbon nanotubes/iron oxide/polypyrrole/carbon composites were prepared by in situ polymerization. The weight percentage of the iron oxide nanoparticles was only 8.8 %. The microwave absorption performance of the carbon nanotubes/iron oxide/polypyrrole/carbon composites was researched and the corresponding filler loading of paraffin in the tested samples was 80 wt%. The reflection loss appeared at 13.92 GHz, which was -53.07 dB, the corresponding effective absorption bandwidth was 6.4 GHz, and the matching thickness was 2.2 mm. The synthetic composite materials have both magnetic loss and dielectric loss. The combination between different materials and the improved impedance matching can enhance the electromagnetic wave performance. At the same time, the composite materials have multiple interface and multilayer core-shell structure, which was beneficial to absorbing electromagnetic waves.

中文翻译：

---

碳纳米管/氧化铁/聚吡咯/碳复合材料的制备及其吸波性能

摘要 采用原位聚合法制备了碳纳米管/氧化铁/聚吡咯/碳复合材料。氧化铁纳米颗粒的重量百分比仅为8.8%。研究了碳纳米管/氧化铁/聚吡咯/碳复合材料的微波吸收性能，测试样品中石蜡的相应填料负载量为80 wt%。反射损耗出现在13.92 GHz，为-53.07 dB，对应的有效吸收带宽为6.4 GHz，匹配厚度为2.2 mm。合成复合材料同时具有磁损耗和介电损耗。不同材料之间的结合和改进的阻抗匹配可以增强电磁波性能。同时，复合材料具有多界面和多层核壳结构，