Hindered phenol functionalized graphene oxide for natural rubber

摘要

Graphical abstractDisplay OmittedHighlights•Hindered phenol functionalized graphene oxide (HPFGO) was synthesized.•FT-IR, XPS, XRD and TGA confirmed the chemical structure of HPFGO.•HPFGO was uniformly dispersed in NR matrix and improved the thermal stability.•NR/HPFGO nanocomposite exhibited excellent thermo-oxidative aging resistance.AbstractHindered phenol functionalized graphene oxide (HPFGO) was prepared by grafting 2,6-Di-tert-butyl-4-hydroxymethyl phenol (DBHMP) onto graphene oxide (GO) using isophorone diisocyanate as bridging agent. FT-IR, XPS, XRD and TGA results confirmed the chemical structure of HPFGO. By latex-mixing method, HPFGO was uniformly dispersed in natural rubber (NR) matrix and obviously enhanced the thermal stability. Importantly, HPFGO significantly improved the thermo-oxidative aging resistance of NR vulcanizate, which was attributed to not only the synergistic antioxidative effect between hindered phenol and urethane groups, but also the barrier role of HPFGO sheets to oxygen.