Journal
COMPOSITES PART B-ENGINEERING
Volume 46, Issue -, Pages 123-129Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2012.10.022
Keywords
Hybrid; Carbon fiber; Resin transfer molding (RTM); Mechanical testing
Funding
- National Natural Science Foundation of China [50703024]
- Program for Liaoning Excellent Talents in University of China [2008RC39]
- Aeronautical Science Foundation of China [2010ZF54017]
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Carbon nanotubes (CNTs) are effective fillers/reinforcements regarding improving the properties of polymer. In the present paper, carboxylic acid functionalized CNTs were used to modify epoxy with intent to develop a nanocomposite matrix for hybrid multiscale composites combining benefits of nanoscale reinforcement with well-established fibrous composites. CNTs were dispersed in epoxy by using high energy sonication. At low contents of CNTs, hybrid multiscale composites specimens were manufactured via resin transfer molding (RTM) process. The processibility of CNTs/epoxy systems was explored with respect to their viscosity. The dispersion quality and re-agglomeration behavior of CNTs in epoxy were characterized using optical microscope. A CNTs loading of 0.025 wt% significantly improved the glass transition temperatures (Tg) of the hybrid multiscale composites. Scanning electron microscopy (SEM) was used to examine the fracture surface of the failed specimens. It is demonstrated that the addition of small amount of CNTs (0.025 wt%) to epoxy for the fabrication of multiscale carbon fabric composites via RTM route effectively improves the matrix-dominated properties of polymer based composites. Hybridization efficiency in carbon fiber reinforced composites using CNTs is found to be highly dependent on the changes in the dispersion state of CNTs in epoxy. (C) 2012 Elsevier Ltd. All rights reserved.
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