Ternary poly(2-ethyl-2-oxazoline)-polyvinylpyrrolidone-graphene nanocomposites: Thermal, electrical, dielectric, mechanical, and antibacterial profiling

Graphene-based poly(2-ethyl-2-oxazoline) (PEOX) and polyvinylpyrrolidone (PVP) blend-matrix nanocomposites were prepared employing different weight percentages of graphene nanoplatelets as filler by ultrasonication assisted solution casting method. These explored for their thermal, electrical, dielectric, mechanical properties, antimicrobial efficiency. Thermogravimetric analysis demonstrated that operates a barrier to limit thermal diffusion across the PEOX-PVP blend matrix, hence, improve stability nanocomposites. The dielectric electric properties such constant, loss, loss tangent electrical conductivity PEOX-PVP-10 wt% nanocomposite found increase with temperature. presence semi-circles in Cole-Cole plot indicated existence relaxation process conduction mechanism nanocomposite. AC conductivity, σAC, was obey Jonscher's power law. temperature-dependent behavior frequency exponent, s, σAC discusses applicability correlated hopping (CBH) model. extracted DC from studies be Arrhenius relation activation energy conduction, Ea, 0.41 eV 0.39 lower higher temperature regions, respectively. enhanced dramatically when loading increased, demonstrating better interaction exists between matrix. PEOX-PVP-15 showed superior (tensile strength: 9.18 MPa Young's modulus: 3.19 MPa) among synthesized Further, antibacterial activities these against Gram-negative (E. coli) Gram-positive facecalis) bacteria revealed differential action.