Enhancement of mechanical performance of epoxy/carbon fiber laminate composites using single-walled carbon nanotubes |
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Authors: | Behnam Ashrafi Jingwen GuanVahid Mirjalili Yunfa ZhangLi Chun Pascal HubertBenoit Simard Christopher T KingstonOrson Bourne Andrew Johnston |
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Affiliation: | a Structures and Materials Performance Laboratory, Institute for Aerospace Research, National Research Council, 1200 Montreal Road, Ottawa, Ontario, Canada K1A 0R6 b Molecular and Nanomaterial Architectures Group, Steacie Institute for Molecular Sciences, National Research Council, Ottawa, 100 Sussex Dr., Ontario, Canada K1A 0R6 c Department of Mechanical Engineering, McGill University, 817 Sherbrooke Street West, Montreal, QC, Canada H3A 2K6 |
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Abstract: | Carbon nanotubes (CNT) in their various forms have great potential for use in the development of multifunctional multiscale laminated composites due to their unique geometry and properties. Recent advancements in the development of CNT hierarchical composites have mostly focused on multi-walled carbon nanotubes (MWCNT). In this work, single-walled carbon nanotubes (SWCNT) were used to develop nano-modified carbon fiber/epoxy laminates. A functionalization technique based on reduced SWCNT was employed to improve dispersion and epoxy resin-nanotube interaction. A commercial prepregging unit was then used to impregnate unidirectional carbon fiber tape with a modified epoxy system containing 0.1 wt% functionalized SWCNT. Impact and compression-after-impact (CAI) tests, Mode I interlaminar fracture toughness and Mode II interlaminar fracture toughness tests were performed on laminates with and without SWCNT. It was found that incorporation of 0.1 wt% of SWCNT resulted in a 5% reduction of the area of impact damage, a 3.5% increase in CAI strength, a 13% increase in Mode I fracture toughness, and 28% increase in Mode II interlaminar fracture toughness. A comparison between the results of this work and literature results on MWCNT-modified laminated composites suggests that SWCNT, at similar loadings, are more effective in enhancing the mechanical performance of traditional laminated composites. |
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Keywords: | A Carbon nanotube A Carbon fiber B Impact behavior B Interface Multiscale composites |
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