Microwave absorption studies of polyaniline nanocomposites encapsulating gold nanoparticles on the surface of reduced graphene oxide in the presence of 2-naphthalene sulfonic acid

Abstract

Polyaniline nanocomposites containing gold nanoparticles (GNPs) attached to the surface of reduced graphene oxide (RGO) were chemically prepared using β-naphthalene sulfonic acid as a dopant. The synthesized composites were characterized using Fourier transform infrared spectroscopy and UV-vis spectroscopy, and their surface morphology and amended crystallinity were determined by scanning electron microscopy and X-ray diffraction, respectively. Further the elemental analysis was also performed to identify the synthesized polymer composites. Complex impedance measurements were performed on the composite samples in the form of films. Sheets prepared by conventional techniques were used to study the microwave absorption properties in the microwave range of 2-12 GHz, and the effects of sample thickness on the microwave absorption were investigated. Experimental results show that the electrical conductivity of the composites increases with increasing concentrations of added GNP-RGO without a percolation threshold.

Characterization and improved electrical conductivity of partially biodegradable polyaniline/poly(1,4‐butylene succinate) polymer composite films

“…has been shown in the short range for more clarity of the spectral information for PANI and the composites PANI/PBS. The bands observed at 1579 and 1499 cm −1 in PANI are, respectively, assigned to the non‐symmetric vibration mode of C=C in the quinoid and benzenoid ring systems in polyaniline . The stretching vibration mode of C–N in aromatic amine nitrogen (quinoid system) in the doped PANI is found at 1310 cm −1 , which corresponds to the oxidation or protonation state.…”

Structural characterization and DC conductivity of honeycomb-patterned poly(ε-caprolactone)/gold nanoparticle-reduced graphite oxide composite films

“…The mixture was kept at room temperature for 3 h with constant stirring. After repeated washing with DI water, the product was dried at 60 1C for 24 h [11,12].…”

Carbon nanostructure composite for electromagnetic interference shielding

“…Basavaraja and coworkers [104] synthesized the composite of PANI−gold nanoparticle (GP)-GO composite and checked its EMI shielding in 2-12 GHz frequency range. In another work on PANI-GP-GO composite, PANI was doped using β-naphthalene sulphonic acid [105]. Chen and coworkers [106] used hybrid fillers of CNT and graphene nanosheets (GNS) in PANI.…”