Grafting polycarbonate onto graphene nanosheets: synthesis and characterization of high performance polycarbonate–graphene nanocomposites for ESD/EMI applications

Abstract

High performance polycarbonate–graphene nanocomposites were synthesized by grafting polycarbonate onto graphene nanosheets with outstanding mechanical and electrical properties.

Free volume correlation with electrical conductivity of polycarbonate/reduced graphene oxide nanocomposites studied by positron annihilation lifetime spectroscopy

“…The peak at 1769 cm −1 is associated with CO stretching vibration . The CH stretching vibrations of methyl are located at 2967, 2962, and 2856 cm −1 . It should be noted that the CH deformation vibration peak in aromatic ring at 829 cm −1 shifts to 832 cm −1 , which is probably due to the π–π stacking between the π conjugated graphene layers and aromatic PC rings .…”

“…Among these conductive fillers, graphene has recently gained importance due to its high aspect ratio, small size, and excellent electrical conductivity . Different methods have been used to fabricate graphene filled PC composites (PC/G) including solution mixing, melt intercalation, and in situ exfoliation . Kim and Macosko prepared PC reinforced with functionalized graphene sheets using melt compounding, and the seven orders of magnitude increase in electrical conductivity was obtained .…”

“…prepared the PC/G nanocomposites by melt blending . Yoon and Jung startlingly grafted hydroxyl‐terminated PC onto methylene diphenyl diisocyanate‐functionalized graphene nanosheets . The PC/G composites with ultrahigh conductivity would find many practical applications in sensors, electronic devices, and electromagnetic interference (EMI) shielding effectiveness areas .…”

Thermal/Electrical Properties and Texture of Carbon Black PC Polymer Composites near the Electrical Percolation Threshold

“…Even though PC belongs to electrically insulating polymers, its limitation in electrical resistivity (c.a. 0.1-1 × 10 −15 Ω•cm) can be exceeded by the addition of conductive fillers, such as metal particles [4,5] and carbon-based materials. If the composite material becomes electrically conductive, it can be used in new applications, in which electrical properties are required, such as antistatic or static dissipation, conductive and electromagnetic shielding materials [4].…”

A review on the mechanical, electrical and EMI shielding properties of carbon nanotubes and graphene reinforced polycarbonate nanocomposites

“…The same group also reported a 72.1% increment of Young modulus and 20.3% increases in tensile strength using 1 wt% epoxy‐functionalized GO, in which GO flakes were dispersed in dimethylformamide and PC dissolved in tetrahydrofuran. Yoon et al developed high‐performance PC/graphene nanocomposites with outstanding mechanical and electrical properties by grafting PC onto graphene nanosheets (PC‐g‐MGNS). The PC‐g‐MGNS nanocomposites were synthesized by grafting hydroxyl‐terminated PC onto methylene diphenyl diisocyanate‐functionalized graphene nanosheets (MGNS).…”