Tailoring the viscoelastic properties of injectable biocomposites: A spectroscopic assessment of the interactions between organic carriers and bioactive glass particles
authors Gonzalo-Juan, I; Tulyaganov, DU; Balan, C; Linser, R; Ferreira, JMF; Riedel, R; Ionescu, E
nationality International
journal MATERIALS & DESIGN
author keywords Injectable biocomposites; Bioglass; PEG; Glycerol; Pastes
keywords CAO-MGO-SIO2 SYSTEM; HYALURONIC-ACID; HYDROXYAPATITE; REGENERATION; ADDITIVES; CAF2; B2O3; NA2O; P2O5
abstract Injectable bioglass (BG) pastes were produced using a melt-quenched glass based on CaO-MgO-SiO2-Na2O-P2O5-CaF2 and two organic carriers, namely polyethylene glycol (PEG) and glycerol (Gly). The interactions between the organic carriers and the surface of the BG particles were assessed by spectroscopic methods (Fourier Transform Infrared, Raman, as well as 29Si and 13C solid-state NMR spectroscopy) in order to understand their effects on the viscoelastic properties of the biocomposites. While pure physical interactions were detected between PEG and the surface of the BG particles, chemical bonding was observed between glycerol and BG, enhancing the network cross-linking degree. Accordingly, the BG network of Gly-BG pastes was more condensed (higher fraction of Q [3] units detected by Raman spectroscopy) in comparison to that of PEG-BG and bare BG. Such chemical interactions between the organic carrier and BG were shown to negatively affect the viscoelastic behaviour of the resulting pastes. Thus, the PEG-based biocomposite exhibited improved flowability in comparison to its analogous Gly-BG biocomposite. (C) 2016 Elsevier Ltd. All rights reserved.
publisher ELSEVIER SCI LTD
issn 0261-3069
year published 2016
volume 97
beginning page 45
ending page 50
digital object identifier (doi) 10.1016/j.matdes.2016.02.085
web of science category Materials Science, Multidisciplinary
subject category Materials Science
unique article identifier WOS:000372506500006
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