20-22 May 2015
Asia/Bangkok timezone
The Centennial Celebration of General Relativity Theory and 80 Years of Thai Physics Graduate

Fabrication and mechanical properties of doped-hydroxyapatite composite.

21 May 2015, 13:00
3h 30m
Board: MNA-49
Poster presentation Material Physics, Nanoscale Physics and Nanotechnology Poster-3

Speaker

Likit Tp (urn:Facebook)

Description

Ionic substitutions in hydroxyapatite (HA) have been extensively studied to improve its biological and/or mechanical properties. This work aimed to prepare and characterize the composite of polycaprolactone (PCL) and Zn-doped, Sr-doped or Zn/Sr-codoped HA. The doped HA nanoparticles were first prepared via a sol-gel method. XRD and FTIR results of the calcined powder showed that HA is the main phase, with b-TCP as the second phase and chemical composition is accordance to other public data. To prepare the composite, the doped HA and PCL powders were mixed at the ratios of 3:7, 4:6, 5:5 and 6:4, and then compressed into a disc shape using an uniaxial hydraulic pressing technique. The specimens were then subjected to a compression test. Young’s modulus was found to increase as the HA content increased. The composites with the 6:4 Sr-doped HA/PCL ratio have the values of compressive modulus of 16.26 GPa and compressive strength of more than 160 MPa which are close to those of compact bones.

Primary author

Likit Tp (urn:Facebook)

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