Premium
Biodegradable composites with aligned hydroxyapatite nanoneedles
Author(s) -
Sun ShihPo,
Wei Mei,
Olson James R.,
Shaw Montgomery T.
Publication year - 2012
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.32749
Subject(s) - materials science , composite material , composite number , anisotropy , modulus , physics , quantum mechanics
We prepared an anisotropic bone graft composite to mimic the hierarchical structure of the natural bone in which aligned hydroxyapatite (HA) nanocrystals deposit along collagen fibers. To approach the modulus and strength of the bone, we incorporated synthesized HA nanoneedles and melt drawn poly( L ‐lactic acid) fibers in our composite as reinforcing components. Their preferred orientation was induced via a modified pultrusion process. The HA orientation distribution was examined using wide angle X‐ray diffraction. Micromechanical Halpin–Tsai model predictions considering the amount, shape, and orientation distribution of HA were compared, favorably, with the experimental observations. © 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2012.