• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      http://www.ias.ac.in/article/fulltext/boms/039/04/0989-0995

    • Keywords

       

      Rice husk ash; diopside; wollastonite; pseudo-wollastonite; hydroxyapatite.

    • Abstract

       

      Regeneration technique is extensively being sought after as a means of achieving bone repair without adverse immunological response. Silicate-based bioactive glasses containing Mg are gaining increasing attention for their biocompatibility. The current work has been focused on designing a facile and economic route using bio-wastes for synthesizing bioactive glasses in the CaO–MgO–SiO$_2$ system. Rice husk ash (RHA) obtained from burning ricehusk was used as silica source, while Ca was extracted from eggshells for preparing the glass through a modified sol–gel approach. The gel formed was irradiated in microwave before sintering at 950$^{\circ}$C for 3 h. Thereafter, bioactivity test was conducted on the samples in simulated body fluid (SBF) at physiological conditions for a maximum of 14 days. Characterization of samples were performed before and after immersion in SBF to evaluate thecomposition, morphology and phases present in the glass using energy-dispersive X-ray analysis, scanning electron microscopy and X-ray diffraction. Apatite formation was confirmed using Fourier transform infrared spectroscopy.Results obtained showed the presence of diopside, wollastonite and pseudo-wollastonite as major bioactive phases. Hydroxyapatite formed on the material within 3 days in SBF, indicating good bioactivity.

    • Author Affiliations

       

      ENOBONG R ESSIEN1 VIOLETTE N ATASIE1 ESTHER U UDOBANG1

      1. Department of Chemical Sciences, Bells University of Technology, P.M.B. 1015 Ota, Nigeria
    • Dates

       
  • Bulletin of Materials Science | News

© 2017 Indian Academy of Sciences, Bengaluru.