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

Abstract

ABSTRACTIn this article, water‐soluble polymer polyvinyl alcohol solution was used to exfoliate the graphene‐like two‐dimensional materials (MoS2 and WS2). 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 WS2 as filler, a series of PVA/WS2 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 T90% improved 44 °C in the air. Furthermore, the three kinds of characteristic temperature of T10%, T50%, and T90% had obvious increase in the N2. 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.