Tribology of polymer-based nanocomposites reinforced with 2D materials

The study of friction and wear of different materials have gained increased attention due to their influence in the component lifetime and on the energy efficiency of the systems. In order to optimize tribological properties in different applications, from gears to medical implants, the use of 2D materials into polymer matrices has attracted interest due to their intrinsic properties, including high mechanical properties, high surface area and even superlubricity features. Graphene and its derivatives, Transitional Metal Dicalcogenides (TMDs), Boron Nitride (BN), and, more recently, MXenes, stand out as the most researched 2D nanomaterials used for polymer nanocomposites. This review aims to describe experimental and computational researches of these 2D polymer nanocomposites regarding tribological properties and applications, evidencing the main mechanisms involved on their enhanced anti-friction performances. Furthermore, an overview and the remaining issues in the area are highlighted, which may serve as a reference for future studies.