Recent progress in polymer/two-dimensional nanosheets composites with novel performances

Since the discovery of graphene in 2004, investigation concerning the novel performances of 2D nanosheets embedded polymer composites have grown rapidly in various fields. In this article, we summarized the preparation of various 2D nanosheets, including graphene, MXene, hexagonal boron nitrides (h-BN), ferroelectric ceramic and transition metal dichalcogenides (TMDs). We highlighted the effects of sizes, thicknesses, surface modifications and arrangements of the 2D nanosheets on the performance of polymer nanocomposites and the emergence of novel electric, thermal conductive, electromagnetic interference shielding and mechanical properties. Subsequently, the relationships between the specific structure of 2D nanosheets and polymer composites properties were discussed. Structure design of polymer composites containing 2D nanosheets is also evaluated and reviewed. Finally, the perspectives and challenges were discussed on the basis of their current developments. This article covers not only an overview of the state-of-the-art advances of 2D nanosheets filled polymer composites but also the future prospects that may open a new window to realize the tunable performance or multifunction of polymers by rationally using 2D nanosheets as reinforcements.