Abstract
This paper investigated manufacture of high-durability phosphate glass fibres for biomedical applications. Five different borophosphate glass formulations in the systems of 45P2O5–5B2O3–5Na2O–(29 − x)CaO–16MgO–(x)Fe2O3 and 45P2O5–5B2O3–5Na2O–24CaO–(21 − x)MgO–(x)Fe2O3 where x = 5, 8 and 11 mol% were produced via melt quenching. The compositions and amorphous nature of the glasses were confirmed by ICP-MS and XRD, respectively. FTIR results indicated depolymerisation of the phosphate chains with a decrease in Q 2 units with increasing Fe2O3 content. DSC analyses showed an increase in T g by ~5 °C with an increment of 3 mol% in Fe2O3 content. The thermal properties were also used to calculate processing window (i.e. T c,ons—T g) and another parameter, K gl, to determine the suitability for fibre drawing directly from melt, which equals (T c,ons—T g)/(T l—T c,ons). The degradation study conducted in PBS solution at 37 °C showed a decrease of 25–47% in degradation rate with increasing Fe2O3 content. This confirmed that the chemical durability of the glasses had increased, which was suggested to be due to Fe2O3 addition. Furthermore, the density measured via Archimedes method revealed a linear increase with increasing Fe2O3 content.
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Acknowledgements
This work was carried out at the International Doctoral Innovation Centre (IDIC). The authors acknowledge the financial support from Ningbo Education Bureau, Ningbo Science and Technology Bureau, China’s MoST and the University of Nottingham. The work is also partially supported by EPSRC (Grant No. EP/L016362/1).
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Tan, C., Ahmed, I., Parsons, A.J. et al. Structural, thermal and dissolution properties of MgO- and CaO-containing borophosphate glasses: effect of Fe2O3 addition. J Mater Sci 52, 7489–7502 (2017). https://doi.org/10.1007/s10853-017-0981-1
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DOI: https://doi.org/10.1007/s10853-017-0981-1
Keywords
- Fe2O3
- Fe2O3 Content
- Chemical Durability
- Phosphate Buffer Saline Solution
- Glass Stability