ABSTRACT To address the poor microwave absorption performance of single‐component materials, rGO/Fe 3 O 4 /PPy and rGO/Fe 3 O 4 /PEDOT ternary nanocomposites with dual electromagnetic loss mechanisms were prepared via microemulsion polymerization, resulting in significantly enhanced microwave absorption properties. Analysis of their structural morphology and microwave absorption performance reveals that, in addition to dipole polarization induced by internal defects within the composites, conduction loss arising from conductivity differences between components, and interfacial polarization effects among multiple constituents, the granular morphology of PEDOT facilitates more effective integration with rGO and Fe 3 O 4 compared to the film‐like structure of PPy. This enhanced integration increases the number of microscopic interfaces within the rGO/Fe 3 O 4 /PEDOT ternary nanocomposite and augments its internal conductive network, thereby intensifying both conduction loss and interfacial polarization effects. Consequently, the rGO/Fe 3 O 4 /PEDOT composite exhibits the highest internal relaxation loss, the greatest dielectric loss value, and optimal microwave absorption performance. Its minimum reflection loss reaches ‐83.16 dB at a matching thickness of 3.4 mm and a frequency of 7.20 GHz, with an effective absorption bandwidth (reflection loss below ‐10 dB) of 4.58 GHz (ranging from 5.12 to 9.70 GHz).
Jin et al. (Wed,) studied this question.