▎ 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, FT-IR, TG, TEM and UV-vis spectroscopy were conducted to characterize the chemical composition and photo-responsive performance of obtained GO-POSS nanocomposites. The results demonstrated that nanocage-structured POSS and nanosheet GO components in GO-POSS exhibited pronounced supramolecular 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. (C) 2018 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.