Carbonate formation on bioactive glasses

Langmuir : the ACS Journal of Surfaces and Colloids
Marta Cerruti, Claudio Morterra

Abstract

The system termed 58S is a sol-gel-synthesized bioactive glass composed of SiO2, CaO, and P2O5, used in medicine as bone prosthetic because, when immersed in a physiological fluid, a layer of hydroxycarbonate apatite is formed on its surface. The mechanism of bioactive glass 58S carbonation was studied in the vacuum by means of in-situ FTIR spectroscopy with the use of CO2, H2O, and CD3CN as probe molecules. The study in the vacuum was necessary to identify both the molecules specifically involved in the carbonation process and the type of carbonates formed. Bioactive glass 58S was compared to a Ca-doped silica and to CaO. On CaO, ionic carbonates could form by contact with CO2 alone, whereas on 58S and on Ca-doped silica carbonation occurred only if both CO2 and an excess of H2O were present on the sample. The function of H2O was not only to block surface cationic sites, so that CO2 could not manifest its Lewis base behavior, but also to form a liquid-like (mono)layer that allowed the formation of carbonate ions. The presence of H2O is also supposed to promote Ca2+ migration from the bulk to the surface. Carbonates formed at the surface of CaO and of Ca-bearing silicas (thus including bioactive glasses) are of the same type, b...Continue Reading

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Citations

May 15, 2012·Journal of Materials Science. Materials in Medicine·Ilaria CacciottiLaura Montanaro
Feb 22, 2012·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Marta Cerruti
Jan 12, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Sara AbdollahiMarta Cerruti
Aug 15, 2008·ChemSusChem·Vittorio BoffaDave H A Blank
Jul 23, 2014·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Anja DörflerAldo R Boccaccini
Oct 5, 2014·Materials Science & Engineering. C, Materials for Biological Applications·Ishu KansalJosé M F Ferreira
Sep 20, 2011·Acta Biomaterialia·Ashutosh GoelJosé M F Ferreira
Jul 22, 2008·Acta Cirúrgica Brasileira·Roger Lanes SilveiraRogério Belle Oliveira
Jul 12, 2007·Journal of Biomaterials Applications·G LusvardiM Cannas
Nov 7, 2013·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Alexander HoppeAldo R Boccaccini
Aug 14, 2013·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Chengfang TanXingdong Zhang
Feb 7, 2021·Materials Science & Engineering. C, Materials for Biological Applications·Roger BorgesJuliana Marchi
Jul 21, 2006·The Journal of Physical Chemistry. B·Marta CerrutiClaudio Morterra
Nov 30, 2021·Chemical Communications : Chem Comm·Djurdja VukajlovicOana Bretcanu
Dec 4, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Sophia SmithMarta Cerruti

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