Effect of magnetite and graphene nanoplatelets on mechanical properties and thermal stability of thermoplastic elastomer

Functional nanocomposites have garnered considerable attention due to their ability to exhibit multifunctional properties and achieve exceptional performance. This current paper aims to analyze the individual and combined effects of magnetite (Fe3O4) and Graphene nanoplatelets (GNPs) on the mechanical, thermal, and morphological properties of a blend consisting Thermoplastic elastomer (TPE) which is made up of Natural rubber (NR) and Polyaniline (PANi). Both nanocomposites were fabricated via melt blending method using an internal mixer, followed by compression via hot/cold pressing. The incorporation of Fe3O4 was observed to consistently enhance the flexural and impact properties compared to GNP-based nanocomposites. Notably, the nanocomposites filled with 6 wt% Fe3O4 displayed the highest flexural strength (2.1 MPa), flexural modulus (31.1 MPa), and impact strength (4.4 kJ/m(2)). Results from thermogravimetric analysis and differential scanning calorimetry demonstrated a significant improvement in thermal stability within the nanocomposites. The introduction of nanoparticles led to a delay in decomposition and melting processes. The hybridization of Fe3O4 and GNP proved effective in synergistically enhancing both mechanical performance and thermal stability. At optimum content, scanning electron microscopy micrographs revealed a uniform dispersion of Fe3O4/GNPs within the TPE-PANi blend, accompanied by strong interactions between the components.