Preparation of polyvinyl alcohol/two‐dimensional transition metal dichalcogenides composites by high‐pressure homogenization

In this article, water‐soluble polymer polyvinyl alcohol solution was used to exfoliate the graphene‐like two‐dimensional materials (MoS 2 and WS 2 ). The concentrations of the two disulfide nanosheets were 0.092 and 0.087 mg/mL in the 10% aqueous solution of PVA. UV–Vis and Raman spectrum demonstrated that the two dispersions were the few layer nanosheets in the solution. Then, taking the exfoliated WS 2 as filler, a series of PVA/WS 2 composites showing the pale yellow transparent films were prepared by solution process method. Composite films showed good thermal performance. When 1 wt% were added in the PVA matrix, the T 90% improved 44 °C in the air. Furthermore, the three kinds of characteristic temperature of T 10% , T 50% , and T 90% had obvious increase in the N 2 . The main reason may be the physical barrier of the 2D nanosheets and the strong interaction force of the S atom of exfoliated 2D nanosheets. The composites could slow the thermal decomposition. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48487.