Effect of Graphene Structure on Mechanical Properties of Graphene/Epoxy Nanocomposites
Graphene nanosheets (GNSs) were mass-produced from flake natural graphite by oxidation, rapid expansion and ultrasonic treatment.The effects of ultrasonic times on the morphology and structure of GNSs and mechanical properties of GNS/epoxy nanocomposites were systematically investigated.GNS/epoxy nanocomposites were fabricated by ultrasonication and cast molding method.The mechanical properties of GNS/epoxy nanocomlposites were influenced by the specific surface area, layer stacking and oxygen-containing functional group contents of GNSs.GNSs had excellent exfoliation degree when the sonication time was 15 h and there were some slightly changes on surface functional group comparing with 0 h sonication graphene and 5 h sonication graphene.When the sonication time was 15 h, the tensile strength and flexural strength of GNS/epoxy nanocomposites reached the highest value of 60.9 MPa and 91.33 MPa, which were increased by 25.3% and 30.94%, respectively, compared with pristine epoxy.The stress-strain curves of tensile testing demonstrated that extending the sonication time of GNSs can increased the fracture toughness of GNS/epoxy nanocomposites.
Graphene Sonication time Structure Nanocomposites Mechanical properties
Dong-dong Zhang Dong-lin Zhao Bin He
State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China
国际会议
The Eighth China National Conference on Functional Materials and Applications(第八届中国功能材料及其应用学术会议)
哈尔滨
英文
496-502
2013-08-23（万方平台首次上网日期，不代表论文的发表时间）