Preparation and characterization of electrically conductive composites of poly(vinyl alcohol)–g–poly(acrylic acid) hydrogels impregnated with polyaniline (PANI)

Abstract

Abstract. Novel electrically conducting composite materials consisting of poly(aniline) (PANI) nanoparticles dispersed in a poly(vinyl alcohol) (PVA)-g-poly(acrylic acid) (PAA) hydrogels were prepared within the polymer matrix by in situ polymerization of aniline. The conversion yield of aniline into PANI particles was determined gravimetrically while structural confirmation of the synthesized polymer was sought by Fourier Transform Infrared (FTIR), UV-visible analysis and X-ray diffraction (XRD) technique. Morphology and dimension of PANI particles embedded into the colored optically semi-transparent hydrogels were evaluated by Scanning Electron Microscopy (SEM) analysis. Electrical conductivity of composite hydrogels of different composition was determined by LCR meter while electroactive behavior of composite hydrogels swollen in electrolyte solution was investigated by Effective Bend Angle (EBA) measurements.

Designing of hydroxyapatite-gelatin based porous matrix as bone substitute: Correlation with biocompatibility aspects

“…In the present study the effect of crosslinker content of the composite on its swelling ratio has been studied by varying its concentration in the range of 0.064 to 0.259 mM. The results are shown in Figure 6d reveal the fact that with the increasing content of MBA in the feeding mixture the crosslink density of the network increases [37] which results in higher crosslink density of the network. This obviously slows down the diffusion of water molecules into the composite and eventually results in a fall in water intake [38].…”

Structural, mechanical and electrical characterization of epoxy-amine/carbon black nanonocomposites

“…Because of the recent commercial availability of nanoparticles, there is an increasing interest in polymer nanocomposites. These composites exhibit substantial improvements in their mechanical properties, such as the strength, modulus, and dimensional stability, permeability to gases, water and hydrocarbons, thermal stability, flame retardancy, chemical resistance, and electrical, dielectric, magnetic and optical properties [8][9][10][11][12][13][14][15]. The effect of the nanofillers in polymer composites on the glass transition (T g ) and the relaxation behaviour of the polymer matrix has been studied for different filler-resin composites.…”

Influence of Dopant Ions on the Properties of Conducting Polyacrylamide/Polyaniline Hydrogels

“…While, inorganic dopants with smaller sizes and localized charge density can provide required charge neutralisation of the polymer backbone, ensuing in the enhanced conductivities. swelled hydrogels in an electrolyte solution using effective bending angle (EBA) measurements [21] . Kim et al synthesized PVA/PAA interpenetrating polymer network (IPN) hydrogel and investigated the influence of electrolyte concentration on their bending behaviour under an applied electric field [22] .…”