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Sol-gel derived 45S5 bioglass: synthesis, microstructural evolution and thermal behaviour.

Ilaria Cacciotti1, Mariangela Lombardi, Alessandra Bianco

  • 1Department of Industrial Engineering, INSTM RU Roma Tor Vergata, University of Rome Tor Vergata, Rome, Italy. ilaria.cacciotti@uniroma2.it

Journal of Materials Science. Materials in Medicine
|May 15, 2012
PubMed
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This study synthesized 45S5 bioactive glass using a sol-gel method. Calcination conditions significantly impacted the glass-ceramics

Area of Science:

  • Materials Science
  • Biomaterials Engineering
  • Ceramics

Background:

  • Bioactive glasses are crucial for bone regeneration.
  • The 45S5 bioactive glass composition exhibits excellent biocompatibility.
  • Sol-gel synthesis offers control over material properties.

Purpose of the Study:

  • To synthesize 45S5 bioactive glass via an aqueous sol-gel route.
  • To investigate the effect of calcination conditions on phase evolution and sintering.
  • To evaluate the in vitro degradation behavior of the synthesized bioactive glass.

Main Methods:

  • Aqueous sol-gel synthesis of 45S5 bioactive glass.
  • Fourier transform infrared spectroscopy (FTIR) for functional groups.
  • Thermogravimetric analysis (TGA) and differential thermal analysis (DTA) for thermal behavior.

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  • X-ray diffraction (XRD) for crystallization and phase evolution.
  • Dilatometry for sintering behavior.
  • In vitro dissolution tests for degradation assessment.

    • Main Results:

    • Characteristic functional groups were identified via FTIR.
    • Thermal analysis revealed distinct thermal events.
    • XRD confirmed phase evolution influenced by calcination.
    • Sintering behavior and microstructural evolution were characterized.
    • Calcination conditions critically affected phase, sintering, and porosity (pore size, interconnectivity).
    • In vitro dissolution tests demonstrated temperature-dependent degradation.

    Conclusions:

    • The aqueous sol-gel method is suitable for 45S5 bioactive glass synthesis.
    • Calcination parameters (temperature, dwelling time) are critical for tailoring the properties of sol-gel derived 45S5 glass-ceramics.
    • Optimized calcination can control phase formation, sintering, and porosity, influencing degradation behavior for potential biomedical applications.