Reinforcement and rupture behavior of carbon nanotubes–polymer nanofibers

Ye, Haihui; Lam, Hoa; Titchenal, Nick; Gogotsi, Yury; Ko, Frank
September 2004
Applied Physics Letters;9/6/2004, Vol. 85 Issue 10, p1775
Academic Journal
High-resolution transmission electron microscopy examination of carbon nanotube–polyacrylonitrile composite fibers synthesized by electrospinning was conducted. Both single-wall carbon nanotubes and multi-wall carbon nanotubes have been used to reinforce the polymer fibers. A two-stage rupture behavior of the composite fibers under tension, including crazing of polymer matrix and pull-out of carbon nanotubes, has been observed. Carbon nanotubes reinforce the polymer fibers by hindering crazing extension, reducing stress concentration, and dissipating energy by pullout. Distribution of nanotubes in the polymer matrix and interfacial adhesion between nanotubes and polymers are two major factors to determine the reinforcement effect of carbon nanotubes in polymer fibers.


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