Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 72, Issue 2, Pages 248-255Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2011.11.009
Keywords
Polymer-matrix composites (PMCs); Carbon nanotubes; Electro-spinning
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Funding
- National Scientific Foundation of China [51103139, 50873040]
- Australian Research Council (ARC)
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Aligned poly(L-lactide) (PLLA)/poly(epsilon-caprolactone) (PCL)/functionalized multiwalled carbon nanotube (F-MWNT) composite fibrous membranes were fabricated by electrospinning. Their morphology, mechanical properties, in vitro degradation and biocompatibility were studied. With a collector rotation speed of 3000 rpm, the electrospun fibers are highly aligned and the F-MWNTs are oriented along the fiber axis, reinforcing the electrospun fibrous membranes. When the F-MWNTs are incorporated, the PLLA/PCL/F-MWNT composite fibers become thinner due to the increased electrical conductivity. However, when the F-MWNTs are increased to 3.75 wt.%, the higher viscosity and aggregation of F-MWNTs have lead to the formation of beads and a wider diameter distribution in the electrospun fibers. Also, the electrospun fibers having smaller diameter, larger porosity and lower crystallinity induced by F-MWNTs have improved the bio-degradation of the PLLA/PCL/F-MWNT fibrous membranes, which have no toxic effects on the proliferation of adipose-derived stem cells. (C) 2011 Elsevier Ltd. All rights reserved.
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