Processing, characterization, and modeling of carbon nanotube-reinforced multiscale composites
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- Processing, characterization, and modeling of carbon nanotube-reinforced multiscale composites
- Kim, Myungsoo; Park, Young-Bin; Okoli, Okenwa I.; Zhang, Chuck
- A. Carbon nanotube; A. Hybrid composites; A. Nanocomposites; C. Modeling; D. Resin transfer molding (RTM)
- Issue Date
- ELSEVIER SCI LTD
- COMPOSITES SCIENCE AND TECHNOLOGY, v.69, no.3-4, pp.335 - 342
- Carbon fiber-reinforced epoxy composites modified with carbon nanotubes (CNTs) were fabricated and characterized. High-energy sonication was used to disperse CNTs in the resin, followed by infiltration of fiber preform with the resin/CNT mixture. The effects of sonication time on the mechanical properties of "multiscale" composites, which contain reinforcements at varying scales, were studied. A low CNT loading of 0.3 wt% in resin had little influence on tensile properties, while it improved the flexural modulus, strength, and percent strain to break by 11.6%, 18.0%, and 11.4%, respectively, as compared to the control carbon fiber/epoxy composite. While sonication is an effective method to disperse CNTs in a resin, duration, intensity, and temperature need to be controlled to prevent damages imposed on CNTs and premature resin curing. A combination of Halpin-Tsai equations and woven fiber micromechanics was used in hierarchy to predict the mechanical properties of multiscale composites, and the discrepancies between the predicted and experimental values are explained.
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