Synthesis, characterization, conductivity, and gas‐sensing performance of copolymer nanocomposites based on copper alumina and poly(aniline‐co‐pyrrole)

Abstract

A series of copolymer nanocomposites based on poly(aniline-co-pyrrole) (PANI-co-PPy) with different contents of copper alumina (Cu-Al 2 O 3 ) nanoparticles were synthesized by benign in situ chemical oxidation polymerization. The structural, thermal transition, and morphological interpretations were carried out by Fourier-transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), differential scanning calorimetry (DSC), and high-resolution transmission electron microscope (HR-TEM). The electrical properties such as alternating current (AC) conductivity and dielectric measurements were performed at room temperature to verify their application in developing new electronic devices. The presence of nanoparticles in the copolymer and the synergistic interaction in the copolymer matrix was confirmed by FTIR and XRD. HR-TEM indicates the nanosized uniform dispersion of nanofiller in the copolymer matrix. DSC revealed a reduction in the flexibility of polymer with an increase in glass transition temperature of copolymer composites. AC conductivity measurement manifested an increased hopping of charge carriers in nanocomposites when compared with pristine PANI-co-PPy. Dielectric properties were maximum for copolymer with 5 wt% Cu-Al 2 O 3 . Excellent gas sensing traits were observed for copolymer nanocomposites due to the electron transfers existing between PANI-co-PPy and ammonia gas. The maximum gassensing properties and electrical conductivity were observed for 5 wt% copolymer composites. The magnificent material properties make PANI-co-PPy/Cu-Al 2 O 3 nanocomposites, a promising contender for developing nano-electronic devices.

High performance optical and electrical properties of zinc oxide reinforced poly(diphenylamine) nanocomposites for optoelectronic applications

“…[5,6] Polymer nanocomposite combines the features of its constituents, such as durability, processability, electrical and optical properties. [2,7] Inorganic nanofillers, including transition metal oxide nanoparticles, distinguish themselves from conventional reinforcing fillers in polymers because of their mixed valence properties. [8] For instance, the high surface area to volume ratio of nanoparticles contributes to the extensive interaction zones between the matrix and the filler.…”

Enhanced dielectric properties, thermal stability and ammonia sensing performance of poly(diphenylamine)/zinc oxide nanocomposites via one step polymerization

“…The third degradation, at around 558 C corresponds to the degradation of the remaining polymer backbone. 6,24,36 The TGA and DTG thermograms of PDPA/ZnO nanocomposites show similar behavior to that of PDPA with a difference in degradation temperatures and mass loss. All nanocomposites exhibit a slower thermal degradation rate than the parent polymer.…”

“…This indicates that the addition of nanoparticles increases the number of polarons in conducting pools of composites and conductivity increases with frequency due to polaron hopping. 24 The filler particles present in composites provide a path for ionic transport and increase the segmental mobility of polymers, which is responsible for the enhanced conductivity up to 7 wt% loadings. The diminishing conductivities at higher filler loadings (10 and 15 wt%) are ascribed to the decreased segmental mobility of ion pairs and ion agglomerates formed by excess filler content.…”

“…In this technique, the size, shape and morphology of the composite cannot be controlled owing to prolonged exposure to the electric field. 24 The commonly employed chemical methods are solution mixing, mechanical mixing and in-situ polymerization. The agglomeration of nanoparticles in the solution and mechanical mixing method makes it difficult to obtain homogeneity.…”

Effect of Cu-Al2O3nanoparticles on the performance of chlorinated polyethylene nanocomposites

“…13,14 Copper alumina has been a popular filler in polymer nanocomposites research because of its superior electrical, thermal, and mechanical characteristics compared to other metal oxide particles. 14,15 Copper-based nanoparticles have attracted a lot of attention in recent years, particularly in the field of polymer composite manufacturing. 16,17 The incorporation of copper alumina nanoparticles into polymer improves its thermal stability and conductivity.…”