Studies on Fourier transform infrared spectroscopy, scanning electron microscope, and direct current conductivity of polyaniline doped zinc ferrite

Abstract

In situ polymerization of aniline was carried out in the presence of zinc ferrite to synthesize polyaniline/ZnFe 2 O 4 composites (PANI/ZnFe 2 O 4 ) by chemical oxidation method. The composites have been synthesized with various compositions (10, 20, 30, 40, and 50 wt %) of zinc ferrite in PANI. From the Fourier transform infrared spectroscopy (FTIR) studies on polyaniline/ZnFe 2 O 4 composites, the peak at 1140 cm À1 is considered to be measure of the degree of electron delocalization. The surface morphology of these composites was studied with scanning electron micrograph (SEM). The dc conductivity has been studied in the temperature range from 40-160 C and supports the one-dimensional variable range hopping (1DVRH) model proposed by Mott. The results obtained for these composites are of scientific and technological interest.

Photo‐induced protonation and conductivity of polyaniline/poly(ethylene glycol) and polyaniline/[poly(ethylene glycol)‐grafted polyaniline] composites

“…A film of PANI‐EB alone showed a peak of 1590 cm −1 , which shifted slightly to 1596 cm −1 with the addition of PEG. This slight shift is similar to the shift of 6 cm −1 that was observed with the addition of methanol to PANI, which was attributed to the hydrogen bonding 42, 43. Therefore, the 6 cm −1 observed in this work is attributed to the hydrogen bonding between PANI and the hydroxyl ends of PEG.…”

Fabrication and gas sensitivity in heterostructures of ortho-chloropolyaniline–ZnO nanocomposites

“…Similar results have been observed in many organic-inorganic composite systems (disordered systems), in which this ambiguity is observed for the initial content of metal oxide in a polymer matrix. [30][31][32][33][34][35] The conductivity increases further for higher concentration (20 wt% and above) of metal oxide in OPANI due to the formation of a favorable conduction path that facilitates the hopping of charge carriers.…”

Dual Electrorheological and Magnetorheological Behaviors of Poly(N-methyl aniline) Coated ZnFe2O4 Composite Particles

“…The characteristic absorption bands in Figure 3 show the peaks of (a) ZnFe 2 O 4 , (b) PMA-coated ZnFe 2 O 4 , and (c) PMA, respectively. In Figure 3 a, 3432 and 1630 cm −1 peaks for O–H bonding, 507 cm −1 for the natural vibration frequency of Zn 2+ , and 415 cm −1 for the octahedral group of Fe 3+ O 2− [ 38 ]. The characteristic peaks of the PMA near 2820 and 1302 cm −1 were allocated to the NCH 3 bending vibration and C–N stretching vibration, respectively [ 39 ].…”