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Int. J. Mol. Sci. 2014, 15(10), 19319-19329;

Mechanical Reinforcement of Diopside Bone Scaffolds with Carbon Nanotubes

Shenzhen Research Institute, Central South University, Shenzhen 518057, China
State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China
Cancer Research Institute, Central South University, Changsha 410078, China
Author to whom correspondence should be addressed.
Received: 5 September 2014 / Revised: 23 September 2014 / Accepted: 15 October 2014 / Published: 23 October 2014
(This article belongs to the Special Issue Biomaterials for Tissue Engineering)
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Carbon nanotubes are ideal candidates for the mechanical reinforcement of ceramic due to their excellent mechanical properties, high aspect ratio and nanometer scale diameter. In this study, the effects of multi-walled carbon nanotubes (MWCNTs) on the mechanical properties of diopside (Di) scaffolds fabricated by selective laser sintering were investigated. Results showed that compressive strength and fracture toughness improved significantly with increasing MWCNTs from 0.5 to 2 wt %, and then declined with increasing MWCNTs to 5 wt %. Compressive strength and fracture toughness were enhanced by 106% and 21%, respectively. The reinforcing mechanisms were identified as crack deflection, MWCNTs crack bridging and pull-out. Further, the scaffolds exhibited good apatite-formation ability and supported adhesion and proliferation of cells in vitro. View Full-Text
Keywords: carbon nanotubes; diopside; mechanical reinforcement; scaffolds carbon nanotubes; diopside; mechanical reinforcement; scaffolds

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Shuai, C.; Liu, T.; Gao, C.; Feng, P.; Peng, S. Mechanical Reinforcement of Diopside Bone Scaffolds with Carbon Nanotubes. Int. J. Mol. Sci. 2014, 15, 19319-19329.

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