▎ 摘　　要

The incorporation of hyperbranched polyamide-functionalized graphene oxide (HPA-GO) into epoxy was proposed to improve the interfacial and mechanical properties. Benefiting from improved dispersion and strengthened interfacial interaction, epoxy composites with HPA-GO showed significant improvements in mechanical and thermomechanical properties at low GO loading. The interaction at the HPA-GO/epoxy interface was investigated to confirm the occurrence of chemical bonding. Strong interfacial bonding improved the stress transfer and distribution of HPA-GO/epoxy interface. Accordingly, the overall strength of epoxy composites was effectively improved on account of the uniform dispersion of HPA-GO and interfacial chemical interaction between HPA-GO and epoxy. Compared with neat epoxy resin, the inclusion of 0.10 wt% HPA-GO led to 310.5 and 37.2% increase in impact strength and tensile strength, respectively. (c) 2019 Society of Chemical Industry