Polyaniline (PANI)-based networks combined with Fe₃O₄ hollow spheres and carbon balls (FCP) for improved electromagnetic wave (EMW) absorption were investigated using an easy-to-industrialize solvothermal and physical method. Hollow structure Fe₃O₄ spheres with a lower density than that of the common solid sphere were prepared. As a thin and light magnetic material, Fe₃O₄ hollow spheres generate magnetic loss, carbon balls and PANI networks generate dielectric loss. The magnetic and conductive parts play appropriate roles in achieving complementarity in the EMW absorption. The relatively high specific surface area introduced by PANI networks promotes interfacial polarization and further supports dielectric loss. In conclusion, the above reasons provide multiple attenuation mechanisms. Samples FCP1 (−65.109 dB, at 12.800 GHz, 1.966 mm, from 5.6 to 18.0 GHz) and FCP2 (−61.033 dB, at 8.480 GHz, 3.328 mm, from 4.3 to 18.0 GHz) demonstrated a wide bandwidth, a small thickness, a minimum reflection loss (R_L), and a low loading ratio (25%) in paraffin-based composites. Specifically, their loading ration of 25% is much lower than the loading ratio of conventional materials (usually 50% and above). In addition, the bandwidth is excessively wide, above 12 GHz, possessing good absorption performance in continuous intervals with different thicknesses. Such excellent characteristics have rarely been reported in literature.

使用易于工业化的溶剂热和物理方法研究了基于聚苯胺 (PANI) 的网络与 Fe ₃ O ₄空心球和碳球 (FCP) 相结合以改善电磁波 (EMW) 吸收。制备了密度低于普通实心球的空心结构Fe ₃ O ₄球。Fe ₃ O ₄作为一种薄而轻的磁性材料空心球产生磁损耗，碳球和 PANI 网络产生介电损耗。磁性和导电部分在实现 EMW 吸收的互补方面发挥了适当的作用。PANI 网络引入的相对较高的比表面积促进了界面极化并进一步支持介电损耗。总之，上述原因提供了多种衰减机制。样品 FCP1（-65.109 dB，12.800 GHz，1.966 mm，5.6 至 18.0 GHz）和 FCP2（-61.033 dB，8.480 GHz，3.328 mm，4.3 至 18.0 GHz，带宽小，带宽宽）最小反射损耗 (R _L)，以及石蜡基复合材料的低负载率 (25%)。具体来说，它们25%的加载率远低于常规材料的加载率（通常为50%及以上）。此外，带宽过宽，在12GHz以上，在不同厚度的连续间隔内具有良好的吸收性能。如此优异的特性在文献中鲜见报道。