▎ 摘　　要

Simple and cost-effective synthesis of surface functionalized graphene and its nanocomposites with polymers is strongly desirable to further expand their utility. Most of the methods reported till date use separate procedures to reduce the graphene oxide (GO), functionalize the resulting graphene and subsequently prepare the nano composite with polymers respectively. In this report, we are utilizing a one-pot hydrothermal synthetic procedure to prepare polymer-graphene nanocomposite through in-situ reduction of GO and amine functionalization of resulting graphene. Polyacryloyl hydrazide (PAHz) possessing hydrazide functional groups is used as the reducing agent to convert the GO to the graphene, subsequently functionalize the resulting graphene with the amino groups and encapsulates the resulting -NH2 functional graphene to prepare the PAHz/rGO nano composite. Various characterization techniques including UV-Vis, fluorescence, XPS, HRTEM and DLS is utilized to characterize the nanocomposite. The resulting nanocomposites possessing hydrodynamic size of ~ 40 nm is utilized to stabilize Pickering emulsion based on olive oil/n-decane and water. The resulting Pickering emulsion exhibited excellent stability with proper droplet packing and no sign of creaming till 17 days under ambient conditions suggesting the efficacy of the PAHz/rGO nanocomposite as stabilizing agent, which is superior compared to a number of systems studied in recent literature. Overall, the synthesized nanocomposites with a narrow size distribution can be potentially utilized in a number of useful areas.