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In this work, cobalt nanoparticles were synthesized by chemical reduction procedure. After the hydrophilic functionalization, Co/polypyrrole(PPy)nanocomposites were prepared by in situ polymerization of pyrrole in aqueous dispersion of Co nanoparticles. The Co/PPy nanocomposites show good electromagnetic properties with both magnetic loss and dielectric loss to electromagnetic wave. The electromagnetic wave absorbing bandwidth(reflection loss -10 d B) for Co/PPy(20 wt%) is above 5.5 GHz at a thickness of 2 mm, and with a maximum reflection loss(around-20.02 d B) at 14.77 GHz. This magnetic nanoparticles/conducting polymer nanocomposites are great potential candidates for electromagnetic wave absorbent, because of their wide-absorbing frequency,strong absorption, good compatibility, low density, and controllable absorbing properties.
In this work, cobalt nanoparticles were synthesized by chemical reduction procedure. After the functionalization, Co / polypyrrole (PPy) nanocomposites were prepared by in situ polymerization of pyrrole in aqueous dispersion of Co nanoparticles. The Co / PPy nanocomposites show good electromagnetic properties with The electromagnetic wave absorption bandwidth (reflection loss - 10 d B) for Co / PPy (20 wt%) is above 5.5 GHz at a thickness of 2 mm, and with a maximum reflection loss (around-20.02 d B) at 14.77 GHz. This magnetic nanoparticles / conducting polymer nanocomposites are great potential candidates for electromagnetic wave absorbent, because of their wide-absorbing frequency, strong absorption, good compatibility, low density, and controllable absorbing properties.