EUROPEAN CONGRESS AND EXHIBITION ON ADVANCED MATERIALS AND PROCESSES - EUROMAT 2021

The interest of the scientific community on composites of polymeric matrices and carbon-based materials, such as graphene and graphene oxide (GO) has been growing mainly due to the already well-known excellent thermal and electrical properties of these materials. Graphene is a high thermal conductivity material. Depending on the conditions of analysis it can reach about 3000Wm^(-1) k^(-1), and these materials have negative thermal expansion coefficient. In contrast, polymers present low thermal conductivity and high thermal expansion coefficient. In nanocomposites systems, thermal and electrical conductivity are inversely proportional to the particle distance dispersion in the matrix. Based on this, it is possible to observe that the interface between the reinforcement phase and the matrix phase increases the thermal conductivity of the nanocomposite. Studies indicate a decrease in the coefficient of thermal expansion with an increase in the concentration of graphene and GO in polymeric matrices. This work aims to investigate the thermal properties of a polymeric nanocomposite reinforced with graphene and GO nanoparticles using instrumented equipment for measuring thermal conductivity. Such equipment consists of a double analysis table equipped with heating and cooling plates. Also, the measurements are performed using a thermal insulation box, as in traditional Guarded Hot Plate method. It is expected by the experimental measurements that thermal conductivity increases and thermal expansion coefficient decreases for the nanocomposite under investigation.

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