Premium
Mechanical Properties and In Vitro Physico‐chemical Reactivity of Gel‐derived SiO 2 –Na 2 O–CaO–P 2 O 5 Glass from Sand
Author(s) -
Essien Enobong R.,
Adams Luqman A.,
Igbari Femi O.
Publication year - 2016
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201500496
Subject(s) - simulated body fluid , chemistry , scanning electron microscope , apatite , fourier transform infrared spectroscopy , sodium silicate , bioactive glass , reagent , mineralogy , microstructure , nuclear chemistry , sintering , sol gel , analytical chemistry (journal) , chemical engineering , composite material , materials science , chromatography , crystallography , organic chemistry , engineering
In the present report, a bioactive glass was synthesized from silica sand as economic substitute to alkoxy silane reagents. Sodium metasilicate (Na 2 SiO 3 ) obtained from the sand was hydrolyzed and gelled using appropriate reagents before sintering at 950 °C for 3 h to produce glass in the system SiO 2 Na 2 OCaOP 2 O 5 . Compression test was conducted to investigate the mechanical strength of the glass, while immersion studies in simulated body fluid (SBF) was used to evaluate reactivity, bioactivity and degradability. Furthermore, the glass samples were characterized by scanning electron microscopy (SEM), X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and energy dispersive X‐ray spectroscopy (EDX) to evaluate the microstructure and confirm apatite formation on the glass surface. The glass, dominated by bioactive sodium calcium silicate, Na 2 Ca 2 Si 3 O 9 (combeite) crystals, had mechanical strength of 0.37 MPa and showed potentials for application as scaffold in bone repair.