Effects of silane-modified carbon nanotubes on flexural and fracture behaviors of carbon nanotube-modified epoxy/basalt composites |
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| Authors: | MT Kim KY Rhee SJ Park D Hui |
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| Affiliation: | 1. Gumi Electronics & Information Technology Research Institute, Gumi 730-853, Republic of Korea;2. School of Mechanical Engineering, Kyung Hee University, Yongin 446-701, Republic of Korea;3. Department of Chemistry, Inha University, 253, Nam-gu, Incheon 402-751, Republic of Korea;4. Department of Mechanical Engineering, University of New Orleans, LA 70148, United States;1. School of Renewable Natural Resources, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA;2. College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China;3. Korea Forest Research Institute, Seoul 130-712, Republic of Korea;1. Laboratory of Environmental Science and Technology, The Xinjiang Technical Institute of Physics and Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, Dresden 01069, Germany;1. Advanced Composite Materials Engineering Group, Department of Mechanical Engineering, University of Alberta, 4-9 Mech. Eng. Bldg., Edmonton, Canada T6G 2G8;2. University of Calgary, Department of Chemical and Petroleum Engineering, 2500 University Drive NW, Calgary AB, Canada T2N 1N4;1. Airworthiness Certification Team, Defense Agency for Technology and Quality, Seoul 130-650, Republic of Korea;2. Department of Mechanical Engineering, Kyung Hee University, Yongin 446-701, Republic of Korea;3. Department of Chemistry, Inha University, Incheon 402-751, Republic of Korea;4. Department of Mechanical Engineering, University of New Orleans, LA 70148, USA |
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| Abstract: | We investigated the effects of carbon nanotube (CNT) modification with silane on the flexural and fracture behaviors of modified carbon nanotube epoxy/basalt (CNT/epoxy/basalt) composites. Flexural and mode I fracture tests were performed using acid-treated and silane-treated CNT/epoxy/basalt composites, respectively. FT-IR analysis was conducted to determine the chemical change on the surface of basalt fiber due to the silane modification. After the fracture tests, the fracture surfaces of the CNT/epoxy/basalt composites were examined with scanning electron microscopy (SEM) to investigate the fracture mechanisms of the CNT/epoxy/basalt composites, depending on the CNT modification. The results show that the flexural modulus and strength of silane-treated CNT/epoxy/basalt composites are ～10% and ～14% greater, respectively, than those of acid-treated CNT/epoxy/basalt composites. The fracture toughness GIc of silane-treated CNT/epoxy/basalt composites was ～40% greater than that of acid-treated CNT/epoxy/basalt composites. SEM examination revealed that the improvement in the flexural and fracture properties of silane-treated CNT/epoxy/basalt composites occurred due to enhanced dispersion and interfacial interaction between the silane-modified CNTs and the epoxy. |
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