Fabrication of polypyrrole/nylon composite with high radar transmission loss for electromagnetic interference shielding application
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https://doi.org/10.54939/1859-1043.j.mst.112.2026.124-132Keywords:
Conductive polymer; Interfacial polymerization; EMI.Abstract
This study investigates the fabrication of conductive polypyrrole (PPy)/nylon composites via a controlled interfacial polymerization technique. The composite was synthesized by positioning a nylon fabric at the interface of an aqueous phase containing oxidant and p-toluene sulfonic acid (p-TSA, 0.1 M) as the dopant, and an organic phase consisting of 3% (v/v) pyrrole in hexane. The influence of oxidant types and reaction temperatures on the formation of the PPy layer was systematically evaluated. Morphological and structural characterization revealed that the PPy was successfully integrated into the nylon matrix, increasing the fabric thickness from 0.09 mm (raw) to 0.1 mm. Secondary electrochemical deposition was performed on the PPy/nylon composite in an aqueous solution containing 0.1 M pyrrole to achieve a greater PPy thickness. Furthermore, electromagnetic interference (EMI) shielding measurements in the X-band frequency range (8–12 GHz) showed a shielding effectiveness (SE) exceeding 20 dB. These results suggest that the as-prepared PPy/nylon composites are promising candidates for lightweight, flexible radar-absorbing materials in advanced electronic applications.
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