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Synthesis and characterization of hydroxyapatite whiskers by hydrothermal homogeneous precipitation using acetamide

Paper ID Volume ID Publish Year Pages File Format Full-Text
2287 107 2010 7 PDF Available
Title
Synthesis and characterization of hydroxyapatite whiskers by hydrothermal homogeneous precipitation using acetamide
Abstract

Long and uniform HA whiskers with high crystallinity, controlled morphology and high aspect ratio were successfully synthesized by hydrothermal homogeneous precipitation using acetamide. Compared with the additive urea, which is commonly used to raise the pH to drive nucleation and growth of HA crystals, acetamide has a low hydrolysis rate under the required hydrothermal conditions. This allows better and easier control, giving rise to rapid growth of whiskers at a low supersaturation. Whisker length and width were in turn determined by solution conditions, including the concentration of Ca and PO4. Whiskers had a mean length of 60–116 μm and an aspect ratio of 68–103 for starting solutions containing 42–84 mmol L−1 Ca and 25–50 mmol L−1 PO4 with a fixed Ca/P ratio of 1.67. Such whiskers are favourable for their improved bone bonding and bioactivity, as well as their mechanical properties. Whiskers were slightly Ca-deficient with Ca/P = 1.60–1.65, with the preferred direction of growth along the c-axis. Variation of acetamide concentration did not affect the constitution, the crystallinity or the crystal growth habit.

Keywords
Hydroxyapatite whiskers; Acetamide; Hydrothermal homogeneous precipitation; Morphology; Crystallinity
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Synthesis and characterization of hydroxyapatite whiskers by hydrothermal homogeneous precipitation using acetamide
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 6, Issue 8, August 2010, Pages 3216–3222
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us