A hundred times faster: Novel, rapid sol-gel synthesis of bio-glass nanopowders (Si-Na-Ca-P system, Ca:P=1.67) without aging
authors Ben-Arfa, BAE; Salvado, IMM; Ferreira, JMF; Pullar, RC
nationality International
journal INTERNATIONAL JOURNAL OF APPLIED GLASS SCIENCE
author keywords oxide; Glass Forming Systems; phosphate; Glass Forming Systems; crystallization; bioglass; bioactivity
keywords IN-VITRO BIOACTIVITY; SILICA-BASED GLASSES; CERAMICS; SIO2-CAO-P2O5; SPECTROSCOPY; TEMPERATURE; REACTIVITY; TEMPLATE; FTIR
abstract Synthesis of sol-gel glass with incorporation of Na2O is extremely difficult, as such glasses have a great tendency to crystallize. Slow drying and aging over several days or weeks is usually required in sol-gel preparation procedures. This work reports a fast, novel route for the synthesis of bioglass powders in a considerably shortened period of 1 h. A comparative study of sol-gel derived glasses made by this novel route using rotary evaporator drying, and a conventional route using oven drying and aging, revealed that the two methods produce stabilized (devitrified) bio-glasses with virtually identical behavior and properties. Indeed, the rapidly dried powder exhibited slightly enhanced properties that should result in improved bioactivity. Fourier-transform infrared spectroscopy was used to understand the structures of the synthesized powders, and MAS-NMR was used to look at the degree of polymerization. This innovative, rapid route was successfully demonstrated to produce glass and devitrified glass nanopowders more than one hundred times quicker than the quickest reported standard drying methods.
publisher WILEY PERIODICALS, INC
issn 2041-1286
year published 2017
volume 8
issue 3
beginning page 337
ending page 343
digital object identifier (doi) 10.1111/ijag.12255
web of science category Materials Science, Ceramics
subject category Materials Science
unique article identifier WOS:000409279800010
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journal analysis (jcr 2019):
journal impact factor 1.917
5 year journal impact factor 2.183
category normalized journal impact factor percentile 66.071
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