Light-responsive nanocomposites combining graphene oxide with POSS based on host-guest chemistry

摘要

Based on the reversible host-guest inclusion/exclusion of cyclodextrin-functionalized graphene oxide(GO-CD) and azobenzene-terminated polyhedral oligomeric silsesquioxane(Azo-POSS), a novel kind of light-responsive nanocomposites GO-POSS was developed under mild condition. ~1H NMR, ET-IR,TG, TEM and UV-vis spectroscopy were conducted to characterize the chemical composition and photoresponsive performance of obtained GO-POSS nanocomposites. The results demonstrated that nanocagestructured POSS and nanosheet GO components in GO-POSS exhibited pronounced supra molecular assembly/disassembly behavior upon UV/vis irradiation. Moreover, GO-POSS nanocomposites showed good water dispersity and had remarkable impact on oxygen permeability of conventional PVA-coated films under varied light irradiation conditions, which would be valuable for developing smart gas barrier materials in packaging.