Синергический эффект гибридного наполнителя на основе графеновых нанопластин и многостенных нанотрубок для повышения теплопроводности эпоксидного композита

Abstract

A hybrid heat-conducting filler based on graphene nanoplates and multi-walled nanotubes was obtained to increase the thermal conductivity of an epoxy binder, exhibiting a synergistic effect. This effect is achieved due to the embedding of multi-walled nanotubes between graphene nanoplates and the formation of effective percolation networks in the composite. The dependence of an increase in the thermal conductivity of an epoxy composite on the mass ratio of graphene nanoplates and multi-walled nanotubes in a mixture of a hybrid filler has been established. The effect of the hybrid filler concentration in the epoxy matrix and the mixing method of graphene nanoplates and multi-walled nanotubes on the thermal conductivity of the composite was found. A synergistic effect between graphene nanoplates and multi-walled nanotubes has been demonstrated, leading to a sixfold increase in the thermal conductivity of epoxy composites at a filler concentration of 5 wt%.