Enhanced bioactivity of a rapidly-dried sol-gel derived quaternary bioglass
authors Ben-Arfa, BAE; Salvado, IMM; Ferreira, JMF; Pullar, RC
nationality International
journal MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
author keywords Glass; Glass-ceramics; Crystallisation; Bioactivity; Hydroxyapatite
keywords CARBONATED HYDROXYAPATITE; INFRARED-SPECTROSCOPY; GLASS-CERAMICS; EVOLUTION; SPECTRA; POWDERS; FTIR; TIME
abstract Novel quaternary (67Si-24Ca-10Na-8P) glass powders were successfully synthesised by sol-gel followed by two alternative drying schedules, conventional drying (CD) and an innovative fast drying (FD) process (200 times quicker). The glasses were thermally stabilised at 550 degrees C, and then characterised by different complementary techniques. The samples showed very similar silica network structures, with the FD one having slightly lower degree of polymerisation than the CD sample. This less polymerised, more open, network structure exhibited an improved bioactivity in simulated body fluid (SBF), probably also due to the apparent presence of poorly crystalline HAp in the stabilised glass powder. In contrast, the CD glass exhibited an unwanted secondary crystalline silica phase. Both glasses showed excellent biomineralisation upon immersion in SBF, being more pronounced in the case of FD with clear evidence of HAp formation after 4 h, while equivalent signs in the CD samples were only noticed after longer immersion periods between 8 h and 1 week.
publisher ELSEVIER SCIENCE BV
issn 0928-4931
year published 2018
volume 91
beginning page 36
ending page 43
digital object identifier (doi) 10.1016/j.msec.2018.05.016
web of science category Materials Science, Biomaterials
subject category Materials Science
unique article identifier WOS:000442192000005
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journal impact factor (jcr 2016): 4.164
5 year journal impact factor (jcr 2016): 3.926
category normalized journal impact factor percentile (jcr 2016): 74.242
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