Effects of graphene nanoplatelets and graphene nanosheets on fracture toughness of epoxy nanocomposites |
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| Authors: | M. M. Shokrieh S. M. Ghoreishi M. Esmkhani Z. Zhao |
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| Affiliation: | 1. Composites Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, , Tehran, 16846‐13114 Iran;2. School of Chemical Engineering, Shandong University of Technology, , 255049 Zibo, Shandong, China |
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| Abstract: | 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. |
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| Keywords: | fracture toughness graphene nanoplatelet graphene nanosheets mechanical properties nanocomposites |
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