Integrated manufacturing of REciclable multi-material COmposites for the TRANSport sector

PMMA/RGO composites are obtained by mixing polymer solutions with RGO dispersions in a common solvent. Adding RGO to PMMA alters the microstructure of resulting films, while increasing the content of RGO in PMMA/RGO composite films enhances their thermal conductivity. Moreover, numerical finite element simulations indicate that PMMA/RGO composites could be used as thermal interface materials, inclusively in the automotive industry.AbstractWith the miniaturization and integration of electronics into more powerful but smaller functional devices, major challenges arise. One of them is to efficiently dissipate the significant amount of thermal energy produced by these electronic devices. This requires interface materials with good thermal management properties. Reduced graphene oxide has attracted a lot of interest in this area due to its good thermal conductivity, similar with those of pristine graphene. In this work, polymethylmethacrylate/reduced graphene oxide (PMMA/RGO) composite thin films have been generated by drop casting mixtures of PMMA solutions and RGO suspensions, all prepared in N,N?dimethylformamide (DMF) solvent. Raman, SEM and AFM investigations confirmed that homogenous PMMA/RGO composite thin films have been obtained, with RGO being uniformly distributed in the blending. Further measurements demonstrated that the thermal conductivity of RGO/PMMA composites increased with the concentration of RGO in the polymeric mixture: for the highest RGO content, the thermal conductivity increased by 210%, with no important modifications of electrical resistivity. These results are very promising for the development of new thermal interface materials based on PMMA/RGO composites to be used, for instance, in automotive industry.

» Publication Date: 11/10/2022

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