Bioactivity of quaternary glass prepared from bentonite clay

Alkoxysilane precursors are the most widely used silica source for sol–gel preparation of silicate-based bioactive glass. However, due to their high cost, alternative sources such as bentonite clay are desirable. In the present work, bentonite clay was reacted with sodium hydroxide (NaOH) to extract...

Full description

Saved in:
Bibliographic Details
Published in:Journal of advanced ceramics 2016-03, Vol.5 (1), p.47-53
Main Authors: Adams, Luqman A., Essien, Enobong R.
Format: Article
Language:English
Subjects:
Bentonite
Biochemistry
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Clay (material)
Composites
Fourier transforms
Glass
Hydroxyapatite
Infrared spectroscopy
Materials Science
Nanotechnology
Natural Materials
Research Article
Silicon dioxide
Structural Materials
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Alkoxysilane precursors are the most widely used silica source for sol–gel preparation of silicate-based bioactive glass. However, due to their high cost, alternative sources such as bentonite clay are desirable. In the present work, bentonite clay was reacted with sodium hydroxide (NaOH) to extract sodium metasilicate (Na 2 SiO 3 ). The obtained Na 2 SiO 3 was converted to gel which was then sintered at 950 ℃ for 3 h to give the bioactive glass in the quaternary composition SiO 2 –NaO–CaO–P 2 O 5 . The resulting glass was incubated in simulated body fluid (SBF) for 0–7 days to evaluate the bioactivity. Furthermore, glass samples were characterized before and after SBF study by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). Results obtained showed the presence of Na 2 Ca 2 Si 3 O 9 (combeite) crystal as the major crystalline phase and the formation of hydroxyapatite (HA) and hydroxycarbonated apatite (HCA) on the surface of the glass after immersion in SBF. The material showed potentials for application as scaffold in bone tissue repair.
ISSN:2226-4108
2227-8508
DOI:10.1007/s40145-015-0172-y