Composites of polypyrrole with conducting and ferromagnetic behaviors

摘要: Composites of polypyrrole (PPy) with electrical and ferromagnetic behaviors were synthesized by a chemical method in the presence p-dodecylbenzene sulfonic acid sodium salt (NaDS) as surfactant dopant. The magnetic properties resulting composites showed behavior, such high saturated magnetization (M s = 3.06-43.7 emu/g), coercive force (H c 9-57 Oe). linearly increased increases Fe content. No influence counterion on this relationship was observed. conductivity at room temperature depended doping degree. highest 10° S/cm achieved under optimal synthetic conditions. A structural characterization elemental analysis, Fourier transform infrared, X-ray diffraction proved that nanometer-sized (16-20-nm) iron oxide (Fe 3 O 4 ) responsible for behavior composites, whereas contributed to difficult deprotonation PPy DS - basic reaction medium.