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Related Experiment Videos

Microstructured microspheres of hydroxyapatite bioceramic.

M C Sunny1, P Ramesh, H K Varma

  • 1Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Poojappura, Thiruvananthapuram - 695 012, India. bmtwing@md2.vsnl.net.in

Journal of Materials Science. Materials in Medicine
|September 7, 2004
PubMed
Summary
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Spherical hydroxyapatite (HAP) microspheres were created using a chitosan-based emulsion and cross-linking method. This technique successfully produced pure HAP microspheres with controlled spherical geometry and size distribution.

Area of Science:

  • Biomaterials Science
  • Materials Engineering
  • Nanotechnology

Background:

  • Hydroxyapatite (HAP) is a key component of bone and teeth, making it valuable for biomedical applications.
  • Developing efficient methods for synthesizing HAP particles with controlled morphology is crucial for advanced material design.
  • Chitosan is a biocompatible polymer often used as a scaffold or matrix in biomaterial fabrication.

Purpose of the Study:

  • To develop a novel method for preparing spherical hydroxyapatite (HAP) microspheres.
  • To investigate the use of a solid-in-water-in-oil (S/W/O) emulsion and cross-linking technique for HAP particle synthesis.
  • To characterize the morphology, size distribution, and yield of the synthesized HAP microspheres.

Main Methods:

  • Preparation of HAP-loaded chitosan solution.

Related Experiment Videos

  • Dispersion of the chitosan-HAP solution into liquid paraffin using a stabilizing agent to form droplets.
  • Cross-linking of chitosan using glutaraldehyde in toluene.
  • Sintering of the chitosan-HAP microspheres at 1150°C to yield pure HAP microspheres.
  • Characterization using scanning electron microscopy (SEM) for morphology and size analysis.

    • Main Results:

    • Successfully synthesized spherical hydroxyapatite (HAP) microspheres with sizes ranging from 125 to 1000 micrometers.
    • The solid-in-water-in-oil (S/W/O) emulsion and cross-linking technique proved effective for HAP particle formation.
    • Scanning electron microscopy confirmed the spherical geometry of the HAP particles.
    • Percentage yield and size distribution of the microspheres were determined.

    Conclusions:

    • The developed S/W/O emulsion and cross-linking method is a viable route for producing spherical HAP microspheres.
    • The technique allows for control over particle size and morphology, important for biomaterial applications.
    • Pure HAP microspheres obtained through this method hold potential for various biomedical and material science applications.