▎ 摘　　要

The effects of surface modification of graphene oxide (GO) and graphene oxide quantum dot (GOQD) nanosheets by conductive polyaniline nanofibers on the interfacial interactions and mechanical properties of the epoxy composite were studied through complementary experimental and theoretical ab initio quantum mechanics approaches. The experimental results showed that functionalization of nanosheets with Pani remarkably improved the thermal stability and mechanical properties of the nanocomposites. The outcomes derived from DFT methods demonstrated that Pani chains adsorbed to GO surfaces via physisorption (i.e., H-bonding and, pi-pi stacking) and chemisorption (i.e., proton transfer from polyaniline to GO) mechanisms. (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.