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Rapid Mix Preparation of Bioinspired Nanoscale Hydroxyapatite for Biomedical Applications
Published on: February 23, 2017
Microstrain in hydroxyapatite carbon nanotube composites.
Catherine Kealley1, Margaret Elcombe, Arie van Riessen
1Bragg Institute, Australian Nuclear Science and Technology Organisation (ANSTO), PMB 1, Menai, NSW 2234, Australia. catherine.kealley@ansto.gov.au
Journal of Synchrotron Radiation
|December 22, 2007
Summary
Synchrotron diffraction revealed hydroxyapatite-carbon nanotube composites have increased strain with more nanotubes. This strain is undesirable for biomedical implant applications, impacting material suitability.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Crystallography
Background:
- Hydroxyapatite (HA) is a key biomaterial for bone regeneration.
- Carbon nanotubes (CNTs) are explored as reinforcements in HA bioceramics.
- Understanding composite properties is crucial for biomedical applications.
Purpose of the Study:
- To analyze crystallite size and non-uniform strain in hydroxyapatite-carbon nanotube composites.
- To compare crystallite size and strain estimation methods.
- To evaluate the effect of CNTs on composite strain.
Main Methods:
- Synchrotron radiation diffraction was used to collect data.
- Line-profile fitting and Rietveld whole-pattern analysis were employed for data interpretation.
- Crystallite size and strain were quantified.
Main Results:
- Both analysis methods yielded comparable crystallite size and strain values.
- Commercial HA showed higher crystallite size and lower strain for the (0 2 3) reflection compared to lab-synthesized HA.
- Increased CNT content led to higher strain in the composite material.
Conclusions:
- Good bonding exists between HA matrix and CNT fibers.
- Elevated strain with increasing CNTs is a concern for biomedical implant applications.
- Further optimization is needed to mitigate strain for improved implant performance.
