Influence of pyrrole feeding ratios on physicochemical characteristics of high-performance multilayered PPy/PVC/PDA@FG-NH₂ nanocomposites

Abstract

Nanocomposites of conjugated polymers polypyrrole (PPy) and polyvinyl chloride (PVC) as matrices and 1,4-phenylenediamine (PDA) as a linker with amine functional graphite (FG-NH2) as filler have been efficiently fabricated using in situ oxidative polymerization, and the effect of various mass ratios on physicochemical characteristics of prepared nanocomposite was investigated. The layer-by-layer oxidative polymerization of various matrices on host filler surface is confirmed by Fourier transform infrared, energy dispersive X-ray, and X-ray photoelectron spectroscopy examinations. Field emission scanning electron microscopy revealed fibrillary morphology of obtained nanocomposites. Thermal stability, glass transition temperature, and melting and crystallization temperature of the nanocomposites were increased with the incorporation of modified graphite. Brunauer–Emmett–Teller analysis explored the improved adsorption capacity (128 cm3 g−1) of the nanocomposite with higher feeding ratio of pyrrole. The influence of FG-NH2 and pyrrole on electrical conductivity performance of composites was also investigated. Functionalized graphite in the resultant PPy/PVC/PDA@FG-NH2 nanocomposites played an important role in forming conducting network in PPy matrix indicating synergistic effect between PPy and FG-NH2.

Polyaniline-based nanocomposites for electromagnetic interference shielding applications: A review

“…44 Hence the performance of shielding material can be enhanced by the arrangement of polymer along with carbon nanomaterials. 45…”

“…44 Hence the performance of shielding material can be enhanced by the arrangement of polymer along with carbon nanomaterials. 45 Generally, magnetic materials as ferrites 46 are also abundantly used for electromagnetic absorption 47 due to their great permeability, stability, and magnetic loss. 48 The blend of dielectric and magnetic loss provides outstanding shielding material by magnetic materials.…”

Hierarchical Polyaniline Core-Shell Nanocomposites Coated on Modified Graphite for Improved Electrical Conductivity Performance

“…Based on energy transition and energy level structure analyses, it is concluded that the absorption of photon takes place by π-π* transition of C=O group and transference of energy occurs by energy level transition from C=O to C-C and C-O groups. As a result, C-C and C-O bonds breakdown from main and branch chains of polymer molecules [ 17 , 18 , 22 , 26 , 27 ]. It was noticed from the C 1s spectrum of PANi/PMMA/PPG-b-PEG-b-PPG@FG that, in addition to the increase in peak intensity of C-N and O-C=O, there was also disappearance of the C-O peak at 288.3 eV indicating a grafting reaction of PPG-b-PEG-b-PPG on PMMA.…”

“…There are numerous investigations focusing on exfoliated graphite composites with a variety of polymers such as polystyrene (PS) [ 14 , 15 , 16 ], low-density polyethylene (LDPE) [ 3 ], polyaniline (PANi) [ 5 ] and polypyrrole (PPy)/copolymers [ 6 , 17 , 18 ]. In all aforementioned studies, EG significantly enhanced the electrical conductance performances of the prepared blends/nanocomposites.…”