Reduced Graphene Oxide (rGO)/ZrO₂ Reinforced Polyimide Nanocomposite Aerogels with Enhanced Properties: A Synergistic Effect of the Nanofillers

Abstract

In this paper, linear-structured polyimide (PI) nanocomposite aerogels were fabricated with incorporation of graphene oxide (GO) and nano-sized zirconium dioxide (ZrO 2 ) via a freezedrying route. SEM images indicate GO and ZrO 2 dispersed well in PI network skeletons after imidization. GO and ZrO 2 can improve physical properties not only separately but also synergistically, generating excellent performances of the nano-composite aerogels with the density of 70 mg cm À 3 , porosity of 95%, shrinkage of 19% and thermal conductivity of 0.0266 W m À 1 k À 1 . This facile route using rational physical incorporation of nanofillers instead of expensive multi-functional monomers distinctly improves overall performances of the prepared PI nanocomposite aerogels.

Production and tribological performance under sliding contact conditions of zirconia and reduced graphene oxide loaded polymer nanocomposites for biomedical applications

“…Additionally, graphene's high specific surface area and two‐dimensional structure make it a useful material for load transferring 42 . Wu et al observed a similar type of effect when polyimide nanocomposites reinforced with rGO and Zirconia Oxide (ZrO 2 ) 53 . Graphene's high thermal conductivity and exceptional mechanical properties make it a prime candidate for tribology applications in polymer nanocomposites 54 .…”

“…42 Wu et al observed a similar type of effect when polyimide nanocomposites reinforced with rGO and Zirconia Oxide (ZrO 2 ). 53 Graphene's high thermal conductivity and exceptional mechanical properties make it a prime candidate for tribology applications in polymer nanocomposites. 54 The sliding motion of the graphene interlayer also contributes to the increased wear resistance of the polymeric composites.…”