▎ 摘　　要

The development of multifunctional rubber composites and the dispersion of fillers are always a focus in the industrial field of tires. In this work, supported by predictions from molecular simulations, reduced graphene oxide grafted with silica (rGO-g-SiO2) is fabricated through hydrosilylation. Structural and morphological characterization shows that SiO2 is present at the rGO surface. rGO-g-SiO2 was subsequently applied to enhance the performance of solution polymerized styrene butadiene rubber (SSBR) composites. As predicted from simulations, the mechanical and thermal properties of rGO-g-SiO2/SSBR are found to be improved due to an enhanced interfacial interaction and higher degree of phonon matching. In particular, with a 1.5% weight percentage of rGO, the reinforcing index and thermal conductivity of 1.5%-rGO-g-SiO2/SSBR are found to be 168.7% and 114.0% higher than that for 1.5%-rGO/SiO2/SSBR (physical mixture), respectively. The reinforced integrated performance is promising for the potential application of rGO-g-SiO2 as a filler for rubber composites.