Magnetic and conducting composites of cobalt ferrite nanorods in a polyaniline matrix

Abstract

Composites of cobalt ferrite nanorods in a polyaniline matrix have been synthesized and characterized by electron microscopy observation, X‐ray diffraction, infrared spectroscopy, thermogravimetric analysis, electrical conductivity, and DC magnetization measurements. The composites were prepared using dodecylbenzenesulphonic acid both as a particle protector and as acid media. In the magnetic experiments, hysteresis loops were observed, revealing ferromagnetism for both particles and composites. The results indicate that the magnetic properties of the particles were preserved in the composites, and on the other hand, the conductivity was almost independent on the polymer/particle ratio. These composites are new materials that show easily tunable magnetic properties, and are expected to be candidates for applications such as microwave shields. POLYM. ENG. SCI., 60:597–606, 2020. © 2020 Society of Plastics Engineers

Earth-abundant and environmentally benign Ni–Zn iron oxide intercalated in a polyaniline based nanohybrid as an ultrafast photodetector

“…The absorption maxima peaks at 3428, 3385, and 3329 cm −1 correspond to the vibrations of the N-H bond. 35,57,58 Distinctive peaks corresponding to the stretching vibrations of the vC-H bond can be found at 3298, 3281, 3158 and 3097 cm −1 . The presence of alkyl substituents in the nanohybrids was confirmed by the C-H bond peaks at 2919 and 2867 cm −1 .…”

Cobalt Ferrite/Polyetherimide Composites as Thermally Stable Materials for Electromagnetic Interference Shielding Uses

“…Landa et al [ 26 ] introduced CoFe 2 O 4 particles in polyaniline and observed that electrical conductivity was enhanced (reaching the metallic domain), while the remanence and coercive field were slightly diminished due to the polymer phase. Saggion et al [ 27 ] used CoFe 2 O 4 nanorods and incorporated them in the same conductive matrix. Their composites displayed conductivity in the semiconductor domain, whereas the magnetic features of the filler were maintained and the magnetic response of the composite was sensitive to the ferrite amount.…”

Tuning the electrical and magnetic properties in multifunctional composite materials based on the PEDOT:DBS conducting polymer and magnetite nanoparticles

“…More recently, we have studied the influence of the composition on the morphology and physicochemical properties of composite materials based on CoFe 2 O 4 magnetic nanoparticles and different conducting polymers. 19,[25][26][27]31,32 Moreover, the results have been rationalized in terms of the interactions, finding that, in PANI-CoFe 2 O 4 nanocomposites, an indirect exchange mechanism (RKKY-like coupling) between CoFe 2 O 4 MNP and PANI governs the magnetic behaviour of the composites. 27 On the other hand, in the case of PEDOT-CoFe 2 O 4 composites, 19 we found that the nanoparticles appear aggregated in clusters, and that the composite morphology depends on the composition.…”