Synthesis, characterization, and properties of new conducting polyaniline/copper sulfide nanocomposites

Abstract

This article reports the facile synthesis of copper sulfide (CuS)/polyaniline (PANI) nanocomposites by in situ polymerization. The composites were characterized by scanning electron microscopy (SEM), UV–visible and Fourier transform infrared (FTIR) spectroscopy, X‐ray diffraction (XRD), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). SEM analysis showed that the metal sulfide nanoparticles were uniformly dispersed in the polymer matrix. The characteristic peaks in FTIR and UV–vis spectra of PANI were found to be shifted to higher wave numbers in PANI/CuS composite, which is attributed to the interaction of CuS nanoparticles with PANI chain. XRD pattern revealed the structurally ordered arrangement of polymer composite and this regularity increases with increase in concentration of nanoparticles. Glass transition temperature of the nanocomposite increased with increase in the concentration of nanoparticles and it indicated the ordered arrangement of the polymer composite than PANI. TGA studies indicated excellent thermal stability of polymer nanocomposite. The electrical properties of nanocomposites were studied from direct current and alternating current resistivity measurement. Conductivity, dielectric constant, and dissipation factor of the nanocomposite were significantly increased with the increase in CuS content in the nanocomposite. The enhancement of these properties suggests that the proposed PANI/CuS nanocomposites can be used as multifunctional materials for nanoelectronic devices. POLYM. ENG. SCI., 54:438–445, 2014. © 2013 Society of Plastics Engineers

Synthesis, characterization, and properties of cashew gum graft poly(acrylamide)/magnetite nanocomposites

“…The high value of dielectric loss tangent at lower frequencies is attributed to the interfacial polarization developed between the graft copolymer and the metal oxide nanoparticles. However, at higher frequencies, the rotational motion of the polar molecules get sufficiently less time to keep up themselves with the applied electrical field in the composite matrix, and hence the tan δ decreases at higher frequencies . The tan δ values of composites are higher than the graft copolymer and the dielectric loss tangent increases with increase in concentration of nanoparticles.…”

Simple and inexpensive electrodeposited silver/polyaniline composite counter electrodes for dye-sensitized solar cells

“…The lower conductivity of pure PANI is due to its amorphous nature as indicated in XRD pattern. The crystalline nature of silver particles forms ordered structure in the composite films, which permits improved electrical transport [46,47]. Figure 3 shows the cyclic voltametry curves of I À 3 =I À redox couple on the CEs.…”

Silver‐Doped Zinc Oxide as a Nanofiller for Development of Poly(vinyl alcohol)/Poly(vinyl pyrrolidone) Blend Nanocomposites

“…So such closely packed chain leads to the polarizability of the polymer by the physical movement of group associated with the dipole. 29 Moreover, the uniform dispersion of nanoparticles inside the blend segments leads to a higher dielectric value for the composites. A sudden decrease in the dielectric constant above 5 wt% of sample is due to the agglomeration of nanoparticles in the polymer chain ,and this reduces the segmental mobility and hence increases the rigidity of the chain.…”