TY - JOUR AU - Chen, Wenhua AU - Liu, Pengju AU - Min, Lizhen AU - Zhou, Yiming AU - Liu, Yuan AU - Wang, Qi AU - Duan, Wenfeng PY - 2018/02/16 Y2 - 2024/03/28 TI - Non-covalently Functionalized Graphene Oxide-Based Coating to Enhance Thermal Stability and Flame Retardancy of PVA Film JF - Nano-Micro Letters JA - Nano-Micro Lett VL - 10 IS - 3 SE - Articles DO - 10.1007/s40820-018-0190-8 UR - https://www.nmlett.org/index.php/nml/article/view/279 SP - 39 AB - <p>The synergistic effect of conventional flame-retardant elements and graphene has received extensive attention in the development of a new class of flame retardants. Compared to covalent modification, the non-covalent strategy is simpler and expeditious and entirely preserves the original quality of graphene. Thus, non-covalently functionalized graphene oxide (FGO) with a phosphorus–nitrogen compound was successfully prepared via a one-pot process in this study. Polyethyleneimine and FGO were alternatively deposited on the surface of a poly(vinyl alcohol) (PVA) film via layer-by-layer assembly driven by electrostatic interaction, imparting excellent flame retardancy to the coated PVA film. The multilayer FGO-based coating formed a protective shield encapsulating the PVA matrix, effectively blocking the transfer of heat and mass during combustion. The coated PVA has a higher initial decomposition temperature of about 260 °C and a nearly 60% reduction in total heat release than neat PVA does. Our results may have a promising prospect for flame-retardant polymers.</p><p>Highlights:</p><p>1 Functionalized graphene oxide (FGO) containing phosphorus–nitrogen compound was prepared via a non-covalent strategy.<br>2 The multilayer FGO-based coating was deposited on a poly(vinyl alcohol) (PVA) film using the layer-by-layer assembly technique.<br>3 A significant synergistic effect between the FTO and conventional flame-retardant elements enhances thermal stability and fire retardancy of the coated PVA film.</p> ER -