Modification and functionalization of two-dimensional MoS2 nanosheets by reversible addition fragmentation chain transfer (RAFT) polymerization

Two-dimensional (2D) layered transition-metal dichalcogenides (TMDs) are a fascinating class of nanomaterials that have garnered enormous interests because of their unique electronic, physical, and chemical properties. MoS2 has been one of the most studied TMDCs and acts as an excellent model system to explore the chemistry of 2D TMDCs. To further modify their properties, and even broaden their application, the chemical functionalization of such layered materials is required.1 Functionalization of the MoS2 nanosheets with polymers has intensively investigated in order to enhance the compatibility of nanosheets with various matrices. Reversible Addition–Fragmentation Chain Transfer (RAFT) is a useful method for the modification of different nanomaterials, due to its versatility. This method is compatible with a wide range of monomers and can be used in all modes of free radical polymerization.2,3 In this study, we present efficient grafting strategies to functionalize MoS2 nanosheets with polystyrene (PSt) chains (MoS2-CS2-PSt) using RAFT polymerization. 1-bromoethylbenzene and CS2 were grafted on the MoS2 surface to synthesize RAFT agent (MoS2-CS2-Ph) and it was used for the controlled polymerization of styrene (Fig 1). MoS2-CS2-PSt was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). This research provides an efficient route towards the design and development of functional MoS2-PSt in gram large scale.

کلیدواژه ها:

Two-dimensional nanosheets ، Molybdenum disulfide (MoS2) ، Reversible Addition-Fragmentation Chain Transfer (RAFT) ، polymerization