▎ 摘　　要

A novel strategy which uses modified carbodiimide coupling mechanism between graphene oxide (GO) surface and SiO2 nanoparticles was developed and compared with a functionalization method which creates physical interactions through ultrasonication. Surface modification was assessed by the presence of Si 2p band in the X-ray photoelectron spectroscopy (XPS) survey spectra, the ester group formation was evaluated through the decrease of C=C/C=O peaks ratio in C 1s spectra deconvolution from 3.5 related to GO to a value of 2.3 for coupled GO-SiO2. A second proof was the increase of the ID/IG ratio from Raman spectra. The research is following the structure-properties correspondence within the epoxy nanocomposites using the hybrid structures as reinforcing agent in a ratio of 0.25%, 0.5% and 1% wt. to matrix from the efficiency of functionalization method to its final effect on the mechanical properties. Interphase formation seen by electronic microscopy, and the data from thermo-mechanical analysis sustained this statement by showing a slight thermal stability increase as consequence of a stabilizing mechanism against heat penetration. Tensile tests were in accordance with SiO2 distribution revealed by transmission electron microscopy (TEM) images, rising Young modulus values with almost 20%, while the tensile stress was improved with more than 40%.