通过掺入羧基功能化单壁碳纳米管（CfSWCNTs）和尼龙来提高羟基磷灰石（HAp）的断裂韧性。
Improvement of the fracture toughness of hydroxyapatite (HAp) by incorporation of carboxyl functionalized single walled carbon nanotubes (CfSWCNTs) and nylon.
作者信息
Khanal S P, Mahfuz H, Rondinone A J, Leventouri Th
机构信息
Department of Physics, Florida Atlantic University, Boca Raton, FL 33431, United States.
Department of Ocean and Mechanical Engineering, Florida Atlantic University, Boca Raton, FL 33431, United States.
出版信息
Mater Sci Eng C Mater Biol Appl. 2016 Mar;60:204-210. doi: 10.1016/j.msec.2015.11.030. Epub 2015 Nov 12.
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.
研究了通过掺入羧基官能化单壁碳纳米管（CfSWCNTs）和聚合ε-己内酰胺（尼龙）来提高合成羟基磷灰石（HAp）断裂韧性的潜力。制备了一系列CfSWCNTs浓度从0到1.5 wt.%不等、添加和不添加尼龙的HAp样品。使用X射线衍射（XRD）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对样品进行表征。采用三点弯曲试验测量复合材料的断裂韧性。对于含有1 wt.% CfSWCNTs和尼龙的样品，发现其断裂韧性的可重复值为3.6±0.3 MPa·√m。该值处于皮质骨断裂韧性范围内。CfSWCNTs含量的增加导致断裂韧性降低，并形成次生相。
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