| Literature DB >> 26706523 |
S P Khanal1, H Mahfuz2, A J Rondinone3, Th Leventouri4.
Abstract
The potential of improving the fracture toughness of synthetic hydroxyapatite (HAp) by incorporating carboxyl functionalized single walled carbon nanotubes (CfSWCNTs) and polymerized ε-caprolactam (nylon) was studied. A series of HAp samples with CfSWCNTs concentrations varying from 0 to 1.5 wt.%, without, and with nylon addition was prepared. X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM) were used to characterize the samples. The three point bending test was applied to measure the fracture toughness of the composites. A reproducible value of 3.6±0.3 MPa.√m was found for samples containing 1 wt.% CfSWCNTs and nylon. This value is in the range of the cortical bone fracture toughness. Increase of the CfSWCNTs content results to decrease of the fracture toughness, and formation of secondary phases.Entities:
Keywords: Fracture toughness; Hydroxyapatite (HAp); Nanocomposites; Single walled carbon nanotubes (SWCNTs)
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Year: 2015 PMID： 26706523 DOI： 10.1016/j.msec.2015.11.030
Source DB: PubMed Journal: Mater Sci Eng C Mater Biol Appl ISSN： 0928-4931 Impact factor: 7.328