  Nanopapers based on graphene and related materials were recently proposed for
application in heat spreader applications. To overcome typical limitations in
brittleness of such materials, this work addressed the combination of graphite
nanoplatelets (GNP) with a soft, tough and crystalline polymer, acting as an
efficient binder between nanoplates. With this aim, polycaprolactone (PCL) was
selected and exploited in this paper. The crystalline organization of PCL
within the nanopaper was studied to investigate the effect of polymer
confinement between GNP. Thermomechanical properties were studied by dynamic
mechanical analyses at variable temperature and creep measurements at high
temperature, demonstrating superior resistance at temperatures well above PCL
melting. Finally, the heat conduction properties on the nanopapers were
evaluated, resulting in outstanding values above 150 Wm-1K-1.
