Sol-Gel Synthesis of SiO<sub>2</sub>-CaO-Na<sub>2</sub>O-P<sub>2</sub>O<sub>5</sub> Bioactive Glass Ceramic from Sodium Metasilicate — Oak Academic Publishing
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Sol-Gel Synthesis of SiO<sub>2</sub>-CaO-Na<sub>2</sub>O-P<sub>2</sub>O<sub>5</sub> Bioactive Glass Ceramic from Sodium Metasilicate
Department of Chemistry, Faculty of Science, University of Lagos, Lagos, Nigeria
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Department of Chemical Sciences, Bells Uni- versity of Technology, Ota, Nigeria
,
Department of Chemistry, Faculty of Science, University of Lagos, Lagos, Nigeria
,
Department of Chemistry, Prairie View A. & M. University, Prairie View, USA
1 Department of Chemistry, Faculty of Science, University of Lagos, Lagos, Nigeria
2 Department of Chemical Sciences, Bells Uni- versity of Technology, Ota, Nigeria
3 Department of Chemistry, Faculty of Science, University of Lagos, Lagos, Nigeria
4 Department of Chemistry, Prairie View A. & M. University, Prairie View, USA
Bioactive glass ceramic with SiO 2 -Ca 2 O-Na 2 O-P 2 O 5 composition was prepared by the sol - gel method using sodium metasilicate (Na 2 SiO 3 ) as silica source. The monolith obtained was sintered at 1000 ?C for 2 hours after which X-ray diffraction (XRD) analysis showed presence of combeite (Na 2 Ca 2 Si 3 O 9 ) as the crystalline phase. In vitro bioactivity test conducted on the material using simulated body fluid (SBF) showed the formation of carbonated hydroxyapatite on its surface. The material during the SBF test was observed to transform from a mechanically strong crystalline phase Na 2 Ca 2 Si 3 O 9 to an amorphous phase after incubation for 14 days indicating that the material was biodegradable. Scanning electron microscopy (SEM) was used to investigate the surface morphology, while Fourier transform infrared (FTIR) spectroscopy facilitated the confirmation of hydroxyapatite (HA) formation. The monolith material obtained may be a good candidate for application in tissue engineering scaffolds.
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