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Title: Improvement of the fracture toughness of hydroxyapatite (HAp) by incorporation of carboxyl functionalized single walled carbon nanotubes (CfSWCNTs) and nylon

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 researched. 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. Lastly, the increase of the CfSWCNTs content results to decrease of the fracture toughness, and formation of secondary phases.

Authors:
 [1];  [1];  [2];  [1]
  1. Florida Atlantic Univ., Boca Raton, FL (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1271887
Alternate Identifier(s):
OSTI ID: 1396763
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Materials Science and Engineering. C, Biomimetic Materials, Sensors and Systems
Additional Journal Information:
Journal Volume: 60; Journal ID: ISSN 0928-4931
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; Hydroxyapatite (HAp); Single walled carbon nanotubes (SWCNTs); Fracture toughness; Nanocomposites

Citation Formats

Khanal, Suraj P., Mahfuz, Hassan, Rondinone, Adam Justin, and Leventouri, Th. Improvement of the fracture toughness of hydroxyapatite (HAp) by incorporation of carboxyl functionalized single walled carbon nanotubes (CfSWCNTs) and nylon. United States: N. p., 2015. Web. doi:10.1016/j.msec.2015.11.030.
Khanal, Suraj P., Mahfuz, Hassan, Rondinone, Adam Justin, & Leventouri, Th. Improvement of the fracture toughness of hydroxyapatite (HAp) by incorporation of carboxyl functionalized single walled carbon nanotubes (CfSWCNTs) and nylon. United States. doi:10.1016/j.msec.2015.11.030.
Khanal, Suraj P., Mahfuz, Hassan, Rondinone, Adam Justin, and Leventouri, Th. Thu . "Improvement of the fracture toughness of hydroxyapatite (HAp) by incorporation of carboxyl functionalized single walled carbon nanotubes (CfSWCNTs) and nylon". United States. doi:10.1016/j.msec.2015.11.030. https://www.osti.gov/servlets/purl/1271887.
@article{osti_1271887,
title = {Improvement of the fracture toughness of hydroxyapatite (HAp) by incorporation of carboxyl functionalized single walled carbon nanotubes (CfSWCNTs) and nylon},
author = {Khanal, Suraj P. and Mahfuz, Hassan and Rondinone, Adam Justin and Leventouri, Th.},
abstractNote = {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 researched. 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. Lastly, the increase of the CfSWCNTs content results to decrease of the fracture toughness, and formation of secondary phases.},
doi = {10.1016/j.msec.2015.11.030},
journal = {Materials Science and Engineering. C, Biomimetic Materials, Sensors and Systems},
number = ,
volume = 60,
place = {United States},
year = {2015},
month = {11}
}

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