2025/09/01 by Shayganpour amirreza, Clausi marialaura
paper · doi:10.15161/oar.it/jw074-q3107
Hematite (α-Fe2O3) has several attractive properties such as corrosion resistance,\ncatalytic activity, sensing properties, and magnetic features but also a room-temperature stable\nthermal conductivity of about 16 W/m K. Its use in polymer-matrix composites as a thermal\nperformance enhancer is rather uncommon. In this study, hematite and graphene nanoplatelet\n(GnP) hybrids in a rubbery latex matrix were prepared and their thermal properties were\ncharacterized. The hybrids were mechanically stabilized into freestanding films by hot-pressing\nthem into a porous cellulosic membrane. Optimization of total filler concentration and the α-\nFe2O3/GnP ratio yielded thermal interface material (TIM) films with thermal conductivity of 8.0\nW/mK. Infrared measurements showed that the TIMs significantly improved heat sink cooling and\ndemonstrated rapid heat transfer in a system simulating stacked up electronic packing.