Journal
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
Volume 47, Issue -, Pages 29-37Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmbbm.2015.03.009
Keywords
Nanoplate; Hydroxyapatite; Polylactide; Nanocomposites; Intercalation
Funding
- National Natural Science Foundation of China [51172158]
- Natural Science Foundation of Hebei Province [2014209204]
- Program for Top-notch Young Talents in University of Hebei Province [BJ2014030]
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Hydroxyapatite (HAp) in the forms of fiber, needle, and whisker has been employed as fillers in polymer composites. Herein, nanoplate-like HAp synthesized by template-assisted self-assembly was used to reinforce polylactide (PLA) nanocomposites via the solution intercalation method. Dynamic and static mechanical properties and cytotoxicity of the as-prepared HAp/PLA nanocomposites were assessed in addition to characterizations by XRD, FTIR, and TGA. XRD analysis confirms the formation of exfoliated structure in the HAp/PLA nanocomposites. The HAp/PLA nanocomposites exhibit better static and dynamic mechanical properties than unreinforced PLA. Furthermore, the HAp/PLA nanocomposite with an optimum HAp content of 20 wt% (20HAp/PLA) demonstrates not only the best mechanical performance but also the highest thermal stability among the nanocomposite samples. Cell studies using a mouse fibroblast cell line (L929) suggest that 20HAp/PLA shows excellent biocompatibility, which makes it a promising material for biomedical applications. (C) 2015 Elsevier Ltd. All rights reserved.
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