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Effects of Silane Modification and Temperature on Tensile and Fractural Behaviors of Carbon Nanotube/Epoxy Nanocomposites

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We investigated the effects of carbon nanotube (CNT) functionalization with silanes and temperature on the tensile and fractural characteristics of CNT/epoxy nanocomposites. Three groups of nanocomposites were fabricated using unmodified, oxidized and silanized CNTs, each at 0.1 wt%. Tensile and fractural tests were performed using the three nanocomposite samples at −30 °C, 20 °C, and 45 °C. Results showed that the tensile strength of silanized samples at −30 °C was about 89% and 241% higher, respectively, than at 20 °C and 45 °C. The elastic modulus of silanized CNT nanocomposite at −30 °C was about 52% and 871% higher, respectively, than at 20 °C and 45 °C. The fracture toughness of silanized samples was higher than those of unmodified and oxidized samples at all temperatures. However, fracture toughness decreased with decreasing temperature. Specifically, fracture toughness of silanized nanocomposites at −30 °C was about 76% and 117% lower, respectively, than those at 20 °C and 45 °C.
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Keywords: CARBON NANOTUBES; FRACTURE TOUGHNESS; NANOCOMPOSITES; SILANE TREATMENT; TENSILE STRENGTH

Document Type: Research Article

Publication date: 2011-01-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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