▎ 摘　　要

In this paper, the thermal conductivity, dielectric properties and dynamic mechanical properties were studied for Graphene Decorated with Graphene Quantum Dots (GDGQD)-epoxy nanocomposites. A maximum thermal conductivity enhancement of 19% registered for 0.75 wt% GDGQD sample where a low acoustic impedance mismatch between the interface of GDGQD fillers and the epoxy matrix occur and a dielectric constant increase of 6% due to the better charge accumulation at the conductive filler/ insulating polymer interface of the composite. Further DMA is performed using the cantilever mode. The loss modulus peak obtained for 0.75 wt% GDGQD-epoxy sample given a maximum value due to the interface interaction and the corresponding storage modulus shown a maximum increment of 21%, due to the molecular dynamics and cross-linking density of the epoxy matrix with GDGQD. The thermal stability of the samples evaluated using Thermal Gravimetric Analysis (TGA) shown an improvement in glass transition temperature (T-g) of nanocomposite for 0.75 wt% GDGQD by 11 degrees C where a greater dispersion of the fillers and efficient functional groups interaction are responsible factors.