Synthesis of Graphene-based Polymer Nanocomposites and comparison of properties

Abstract

Biodegradable polymers promise a more sustainable future. Among a wide range of biopolymers utilized, Poly Lactic Acid (PLA) possess better biomechanical and functional characteristics and is used in various level of applications. However, to have better suitability for biomedical applications, it is necessary to enhance the overall performance of PLA such as biodegradability, porosity, and mechanical properties. Reinforcement of the matrix material with nanofiller is a commonly used method to achieve this. Graphene is the most versatile material with exotic mechanical, electrical, and thermal properties. Its combination with polymers can create wonders. Graphene-based polymer composites exhibit potential use in various fields that include energy storage, biomedical use, and environmental applications. In this work, nanocomposites of PLA with graphene derivatives like Graphene Oxide (GO) and reduced Graphene Oxide (rGO) were fabricated by the solvent casting method. The composites' biological and mechanical properties were investigated and compared. Results demonstrate that the incorporation of GO and rGO enhanced the properties of PLA. The mechanical parameters of the composites with rGO were higher than those of the composites with GO in terms of tensile strength and Young's modulus. A reduction in elongation at break was observed for composites reinforced with rGO. PLA/rGO composites exhibit higher mechanical and biological properties than PLA/GO composites. The developed nanocomposite will be a promising competitor in the research arena with potential applications.