标题：Effects of graphene nanoplatelets and graphene nanosheets on fracture toughness of epoxy nanocomposites
作者：Shokrieh, M. M.; Ghoreishi, S. M.; Esmkhani, M.; Zhao, Z.
作者机构：[Shokrieh, M. M.; Ghoreishi, S. M.; Esmkhani, M.] Iran Univ Sci & Technol, Sch Mech Engn, Ctr Excellence Expt Solid Mech & Dynam, Composites Res Lab, 更多
通讯作者地址：[Shokrieh, MM]Iran Univ Sci & Technol, Sch Mech Engn, Ctr Excellence Expt Solid Mech & Dynam, Composites Res Lab, Tehran 1684613114, Iran.
来源：FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
关键词：fracture toughness; graphene nanoplatelet; graphene nanosheets;; mechanical properties; nanocomposites
摘要：The effects of graphene nanoplatelets (GPLs) and graphene nanosheets (GNSs) on fracture toughness and tensile properties of epoxy resin have been studied. A new technique for synthesis of GPLs based on changing magnetic field is developed. The transmission-electron microscopy and the Raman spectroscopy were employed to characterize the size and chemical structure of the synthesized graphene platelets. The critical stress intensity factor and tensile properties of epoxy matrix filled with GPL and GNS particles were measured. Influence of filler content, filler size and dispersion state was examined. It was found that the GPLs have greater impact on both fracture toughness and tensile strength of nanocomposites compared with the GNSs. For instance, fracture toughness increased by 39% using 0.5 wt% GPLs and 16% for 0.5 wt% GNSs.