New Insight into Mixing Fluoride and Chloride in Bioactive Silicate Glasses

Abstract Adding fluoride into bioactive glasses leads to fluorapatite formation and a decrease in glass transition temperature. Recently, chloride has been introduced into glasses as an alternative to fluoride. The presence of the large chloride ion lowers glass crystallisation tendency and increase...

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Autores principales:	Xiaojing Chen, Xiaohui Chen, Alfonso Pedone, David Apperley, Robert G. Hill, Natalia Karpukhina
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/98cf9065b67248a19410b28e59f0070d
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spelling	oai:doaj.org-article:98cf9065b67248a19410b28e59f0070d2021-12-02T15:07:45ZNew Insight into Mixing Fluoride and Chloride in Bioactive Silicate Glasses10.1038/s41598-018-19544-22045-2322https://doaj.org/article/98cf9065b67248a19410b28e59f0070d2018-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-19544-2https://doaj.org/toc/2045-2322Abstract Adding fluoride into bioactive glasses leads to fluorapatite formation and a decrease in glass transition temperature. Recently, chloride has been introduced into glasses as an alternative to fluoride. The presence of the large chloride ion lowers glass crystallisation tendency and increases glass molar volume, which effectively facilitates glass degradation and bone-bonding apatite-like layer formation. However, there is no information regarding the effect of mixing fluoride and chloride on the glass structure and properties. This study aims to synthesize mixed fluoride and chloride containing bioactive glasses; investigate the structural role of fluoride and chloride and their effects on glass properties. The chloride content measurements reveal that 77–90% of chloride was retained in these Q2 type glasses. Glass transition temperature reduced markedly with an increase in CaX2 (X = F + Cl) content, while the glass molar volume increased. 29Si MAS-NMR results show that the incorporation of mixed fluoride and chloride did not cause significant change in the polymerization of the silicate network and no detectable concentration of Si-F/Cl bands were present. This agrees with 19F NMR spectra showing that F existed as F-Ca(n) species.Xiaojing ChenXiaohui ChenAlfonso PedoneDavid ApperleyRobert G. HillNatalia KarpukhinaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xiaojing Chen Xiaohui Chen Alfonso Pedone David Apperley Robert G. Hill Natalia Karpukhina New Insight into Mixing Fluoride and Chloride in Bioactive Silicate Glasses
description	Abstract Adding fluoride into bioactive glasses leads to fluorapatite formation and a decrease in glass transition temperature. Recently, chloride has been introduced into glasses as an alternative to fluoride. The presence of the large chloride ion lowers glass crystallisation tendency and increases glass molar volume, which effectively facilitates glass degradation and bone-bonding apatite-like layer formation. However, there is no information regarding the effect of mixing fluoride and chloride on the glass structure and properties. This study aims to synthesize mixed fluoride and chloride containing bioactive glasses; investigate the structural role of fluoride and chloride and their effects on glass properties. The chloride content measurements reveal that 77–90% of chloride was retained in these Q2 type glasses. Glass transition temperature reduced markedly with an increase in CaX2 (X = F + Cl) content, while the glass molar volume increased. 29Si MAS-NMR results show that the incorporation of mixed fluoride and chloride did not cause significant change in the polymerization of the silicate network and no detectable concentration of Si-F/Cl bands were present. This agrees with 19F NMR spectra showing that F existed as F-Ca(n) species.
format	article
author	Xiaojing Chen Xiaohui Chen Alfonso Pedone David Apperley Robert G. Hill Natalia Karpukhina
author_facet	Xiaojing Chen Xiaohui Chen Alfonso Pedone David Apperley Robert G. Hill Natalia Karpukhina
author_sort	Xiaojing Chen
title	New Insight into Mixing Fluoride and Chloride in Bioactive Silicate Glasses
title_short	New Insight into Mixing Fluoride and Chloride in Bioactive Silicate Glasses
title_full	New Insight into Mixing Fluoride and Chloride in Bioactive Silicate Glasses
title_fullStr	New Insight into Mixing Fluoride and Chloride in Bioactive Silicate Glasses
title_full_unstemmed	New Insight into Mixing Fluoride and Chloride in Bioactive Silicate Glasses
title_sort	new insight into mixing fluoride and chloride in bioactive silicate glasses
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/98cf9065b67248a19410b28e59f0070d
work_keys_str_mv	AT xiaojingchen newinsightintomixingfluorideandchlorideinbioactivesilicateglasses AT xiaohuichen newinsightintomixingfluorideandchlorideinbioactivesilicateglasses AT alfonsopedone newinsightintomixingfluorideandchlorideinbioactivesilicateglasses AT davidapperley newinsightintomixingfluorideandchlorideinbioactivesilicateglasses AT robertghill newinsightintomixingfluorideandchlorideinbioactivesilicateglasses AT nataliakarpukhina newinsightintomixingfluorideandchlorideinbioactivesilicateglasses
_version_	1718388405614673920

New Insight into Mixing Fluoride and Chloride in Bioactive Silicate Glasses

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