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Fabrication of novel calcium phosphate/poly(lactic acid) fiber composites
Author(s) -
Kothapalli Chandrasekhar R.,
Shaw Montgomery T.,
Olson James R.,
Wei Mei
Publication year - 2008
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.30848
Subject(s) - materials science , polylactic acid , composite material , fiber , scanning electron microscope , nucleation , flexural strength , flexural modulus , precipitation , deposition (geology) , polyester , polymer , chemistry , paleontology , physics , organic chemistry , sediment , meteorology , biology
Abstract Composites using high‐modulus polylactic acid (PLA) fibers coated with calcium phosphate (CaP) were prepared using a cyclic precipitation technique. Scanning electron microscopy revealed that small nuclei of CaP formed after the first soaking cycle, while large quantities of CaP particles were observed after the sixth cycle. The amount of CaP deposited on the PLA yarn increased with deposition time in Ca 2+ and PO 4 3−solutions and number of cycles, and decreased with stirring rate during washing cycles. It was observed that around 35 wt % of CaP was deposited on the yarn surface after six cycles of cyclic‐soaking. Based on the results, a heterogeneous nucleation and growth mechanism was proposed for the CaP deposition on the surface of hydrolyzed polyester. Composites comprising the coated fibers in a poly(caprolactone) matrix exhibited flexural moduli within the range of that of the cortical bone. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2008