Enhanced stress transfer and thermal properties of polyimide composites with covalent functionalized reduced graphene oxide

Effect of polymer modifier chain length on thermal conductive property of polyamide 6/graphene nanocomposites

“…4b and S1b) can also prove the structures of rGO and GP. The Raman spectrum of GO demonstrated a D band at 1339 cm −1 , corresponding to sp 3 -hybridized carbons and assigned to the breathing mode of κ-point phonons of A 1g symmetry; The G band at 1595 cm −1 corresponds to sp 2 -hybridized carbons and assigned to the first-order scattering of E 2g phonons [5,32,33]. The Raman spectra of the rGO also contained both D 11 and G bands (at 1326 and1577 cm −1 , respectively); however, rGA possessed a higher D/G intensity ratio [I(D/G)] than GO.…”

A facile assembly of polyimide/graphene core–shell structured nanocomposites with both high electrical and thermal conductivities

“…2b. Characteristic absorption bands of GO are observed at 1719 cm À1 (C@O stretching), 1637 cm À1 (C@C stretching), 1228 cm À1 (CAOH stretching), 1064 cm À1 (CAO of epoxy stretching) [58,59]. The OAH stretching vibrations in the region of 3000-3600 cm À1 can be attributed to the hydroxyl and carboxyl groups of GO and residual water between GO sheets [60].…”

Enhanced thermal conductivity and retained electrical insulation for polyimide composites with SiC nanowires grown on graphene hybrid fillers

“…The stiffness and high aspect ratio of 1D-2D hybrid nanostructure increase the hindrance of the segmental motion of the polyimide chains, resulting in a significant increase in the composites modulus [43,44]. However, the incorporation of graphene to polymer may be to increase Young's modulus while sending down the tensile toughness of polymer matrix [45][46][47]. As opposed to the Young's modulus in this study, the tensile strength and elongation of the PI composites decrease with the increasing content of SiC NWs -GSs nanofillers, indicating a negative effect of solid fillers on ductility of organic/inorganic composites [48].…”