Synthesis and Characterization of Polyaniline Nanocomposites

摘要

Polyaniline/celluiose / Fe3O4 nanocomposites with different Fe3O4 amounts were synthesized with in situ polymeri-zation method and characterized by transmission electron microscopy (TEM), scanning electron microscope (SEM), microhardness, thermogravimetric analysis (TGA), conductivity and dielectric spect-roscopy. The morphology investigation shows that the PANI/ cellulose / Fe3O4 nanocomposite are relatively uniform. High dispersion is observed in the per-mittivity s' especialJy in the low frequen-cy range, even for low Fe3O4 content. On the other hand, at higher concentrations of Fe3O4 an abrupt increase in e' & s" is apparent. At this critical loading a dras-tic increase in the electrica! conductivity is reached.