Siam Physics Congress 2015

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.