Effect of boron oxide addition on fibre drawing, mechanical properties and dissolution behaviour of phosphate-based glass fibres with fixed 40, 45 and 50 mol% P2O5

Sharmin, Nusrat; Parsons, Andrew J.; Rudd, Chris D.; Ahmed, Ifty

Abstract

© The Author(s) 2014. Previous studies investigating manufacture of phosphate-based glass fibres from glasses fixed with P2O5 content less than 50 mol% showed that continuous manufacture without breakage was very difficult. In this study, nine phosphate-based glass formulations from the system P2O5-CaO-Na2O-MgO-B2O2 were prepared with P2O5 contents fixed at 40, 45 and 50 mol%, where Na2O was replaced by 5 and 10 mol% B2O3 and MgO and CaO were fixed to 24 and 16 mol%, respectively. The effect of B2O3 addition on the fibre drawing, fibre mechanical properties and dissolution behaviour was investigated. It was found that addition of 5 and 10 mol% B2O3 enabled successful drawing of continuous fibres from glasses with phosphate (P2O5) contents fixed at 40, 45 and 50 mol%. The mechanical properties of the fibres were found to significantly increase with increasing B2O3 content. The highest tensile strength (1200 ± 130 MPa) was recorded for 45 P2O5-16CaO-5Na2OP-24MgO-10B2O3 glass fibres. The fibres were annealed, and a comparison of the mechanical properties and mode of degradation of annealed and non-annealed fibres were investigated. A decrease in tensile strength and an increase in tensile modulus were observed for the annealed fibres. An assessment of the change in mechanical properties of both the annealed and non-annealed fibres was performed in phosphate-buffered saline (PBS) at 37° for 28 and 60 days, respectively. Initial loss of mechanical properties due to annealing was found to be recovered with degradation. The B2O3-containing glass fibres were found to degrade at a much slower rate as compared to the non-B2O3-containing fibres. Both annealed and non-annealed fibres exhibited a peeling effect of the fibre's outer layer during degradation.

• Journal Article Type: Article
• Acceptance Date: Jun 17, 2014
• Online Publication Date: Jun 17, 2014
• Publication Date: Nov 1, 2014
• Deposit Date: Nov 12, 2020
• Publicly Available Date: Nov 18, 2020
• Journal: Journal of Biomaterials Applications
• Print ISSN: 0885-3282
• Electronic ISSN: 1530-8022
• Publisher: SAGE Publications
• Peer Reviewed: Peer Reviewed
• Volume: 29
• Issue: 5
• Pages: 639-653
• DOI: https://doi.org/10.1177/0885328214539824
• Public URL: https://nottingham-repository.worktribe.com/output/3187929
• Publisher URL: https://journals.sagepub.com/doi/10.1177/0885328214539824