New sol-gel synthesis of a (CaO)(0.3)( Na2O)(0.2)(P2O5)(0.5) bioresorbable glass and its structural characterisation

Pickup, D.M. and Guerry, P. and Moss, R.M. and Knowles, J.C. and Smith, M.E. and Newport, R.J. (2007) New sol-gel synthesis of a (CaO)(0.3)( Na2O)(0.2)(P2O5)(0.5) bioresorbable glass and its structural characterisation. Journal of Materials Chemistry, 17 (45). pp. 4777-4784. ISSN 0959-9428. (Full text available)

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http://dx.doi.org/10.1039/b709955j

Abstract

An improved sol-gel synthesis of (CaO)(0.3)(Na2O)(0.2)(P2O5)(0.5) bioresorbable glass has been developed. The structures of both the dried gel and the stabilised sol-gel glass have been characterised using high-energy XRD, P-31 MAS NMR and FT-IR spectroscopy. The structure of the analogous melt-quench prepared glass has also been studied for comparison. The results show that the dried gel has a structure consisting of mainly Q(0) and Q(1) phosphate units, whereas that of the stabilised sol-gel glass comprises predominantly Q(1) and Q(2) units. Furthermore, it is demonstrated that the structure of the sol-gel glass is similar to that of its melt-quenched counterpart except for the presence of hydroxyl groups which terminate the phosphate chains, reducing the connectivity of the network.

Item Type: Article
Subjects: Q Science > Q Science (General)
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences > Functional Materials Group
Depositing User: Bob Newport
Date Deposited: 16 Jul 2008 18:41
Last Modified: 06 Sep 2011 00:07
Resource URI: http://kar.kent.ac.uk/id/eprint/8233 (The current URI for this page, for reference purposes)
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