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Dr Andrew Parsons' Outputs (37)

Novel bioresorbable phosphate glass fiber textile composites for medical applications (2017)
Journal Article
Zhu, C., Ahmed, I., Parsons, A. J., Wang, Y., Tan, C., Liu, J., Rudd, C. D., & Liu, X. (2018). Novel bioresorbable phosphate glass fiber textile composites for medical applications. Polymer Composites, 39(S1), E140-E151. https://doi.org/10.1002/pc.24499

A manual bench-top inkle-type loom was designed to enable hand woven textiles. These PGF textiles, along with unidirectional (UD) fiber mats made from the same batch of yarns, were utilized to manufacture fully resorbable textile composites (T-C), un... Read More about Novel bioresorbable phosphate glass fiber textile composites for medical applications.

Wet and dry flexural high cycle fatigue behaviour of fully bioresorbable glass fibre composites: In-situ polymerisation versus laminate stacking (2017)
Journal Article
Chen, M., Lu, J., Felfel, R. M., Parsons, A. J., Irvine, D. J., Rudd, C. D., & Ahmed, I. (2017). Wet and dry flexural high cycle fatigue behaviour of fully bioresorbable glass fibre composites: In-situ polymerisation versus laminate stacking. Composites Science and Technology, 150, 1-15. https://doi.org/10.1016/j.compscitech.2017.07.006

Fully bioresorbable phosphate based glass fibre reinforced polycaprolactone (PCL/PGF) composites are potentially excellent candidates to address current issues experienced with use of metal implants for hard tissue repair, such as stress shielding ef... Read More about Wet and dry flexural high cycle fatigue behaviour of fully bioresorbable glass fibre composites: In-situ polymerisation versus laminate stacking.

Structural, thermal and dissolution properties of MgO- and CaO-containing borophosphate glasses: effect of Fe2O3 addition (2017)
Journal Article
Tan, C., Ahmed, I., Parsons, A. J., Sharmin, N., Zhu, C., Liu, J., Rudd, C. D., & Liu, X. (2017). Structural, thermal and dissolution properties of MgO- and CaO-containing borophosphate glasses: effect of Fe2O3 addition. Journal of Materials Science, 52(12), 7489-7502. https://doi.org/10.1007/s10853-017-0981-1

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–(2... Read More about Structural, thermal and dissolution properties of MgO- and CaO-containing borophosphate glasses: effect of Fe2O3 addition.

Compositional dependency on dissolution rate and cytocompatibility of phosphate-based glasses: effect of B2O3 and Fe2O3 addition (2017)
Journal Article
Sharmin, N., Gu, F., Ahmed, I., & Parsons, A. J. (2017). Compositional dependency on dissolution rate and cytocompatibility of phosphate-based glasses: effect of B2O3 and Fe2O3 addition. Journal of Tissue Engineering, 8, 204173141774445. https://doi.org/10.1177/2041731417744454

The unique property of phosphate-based glasses and fibres to be completely dissolved in aqueous media is largely dependent on the glass composition. This article focuses on investigating the effect of replacing Na2O with 3 and 5 mol% Fe2O3 on cytocom... Read More about Compositional dependency on dissolution rate and cytocompatibility of phosphate-based glasses: effect of B2O3 and Fe2O3 addition.

Structure–properties relationships in fibre drawing of bioactive phosphate glasses (2017)
Journal Article
Muñoz-Senovilla, L., Muñoz, F., Tricot, G., Ahmed, I., & Parsons, A. J. (2017). Structure–properties relationships in fibre drawing of bioactive phosphate glasses. Journal of Materials Science, 52(15), 9166-9178. https://doi.org/10.1007/s10853-017-0773-7

New bioactive phosphate glasses suitable for continuous fibre production are investigated in this work. The structure of both bulk and fibres from Na2O–CaO–MgO–P2O5 glasses has been studied by means of Raman and 31P and 23Na nuclear magnetic resonanc... Read More about Structure–properties relationships in fibre drawing of bioactive phosphate glasses.

Compounding and rheometry of PLA nanocomposites with coated and uncoated hydroxyapatite nanoplatelets (2016)
Presentation / Conference Contribution
Tomczynska, M. M., Choong, G. Y., De Focatiis, D. S., Grant, D. M., & Parsons, A. J. (2015, September). Compounding and rheometry of PLA nanocomposites with coated and uncoated hydroxyapatite nanoplatelets. Presented at The Polymer Processing Society Conference 2015, Graz, Austria

Polylactic acid and novel nanoplatelets of hydroxyapatite (HANP) were compounded in a laboratory scale twin-screw extruder and injection moulded to shape. The effect of HANP loading content, between 1 wt% and 10 wt%, and of HANP surface coating with... Read More about Compounding and rheometry of PLA nanocomposites with coated and uncoated hydroxyapatite nanoplatelets.

Structure, viscosity and fibre drawing properties of phosphate-based glasses: effect of boron and iron oxide addition (2016)
Journal Article
Sharmin, N., Rudd, C. D., Parsons, A. J., & Ahmed, I. (2016). Structure, viscosity and fibre drawing properties of phosphate-based glasses: effect of boron and iron oxide addition. Journal of Materials Science, 51(16), 7523-7535. https://doi.org/10.1007/s10853-016-0032-3

© 2016, Springer Science+Business Media New York. Resorbable phosphate-based glasses have been applied as fibrous reinforcement for resorbable polymers for fracture fixation. The mechanical properties of these composites largely depend on the mechani... Read More about Structure, viscosity and fibre drawing properties of phosphate-based glasses: effect of boron and iron oxide addition.

In-situ polymerisation of fully bioresorbable polycaprolactone/phosphate glass fibre composites: in vitro degradation and mechanical properties (2015)
Journal Article
Chen, M., Parsons, A. J., Felfel, R. M., Rudd, C. D., Irvine, D. J., & Ahmed, I. (2016). In-situ polymerisation of fully bioresorbable polycaprolactone/phosphate glass fibre composites: in vitro degradation and mechanical properties. Journal of the Mechanical Behavior of Biomedical Materials, 59, 78-89. https://doi.org/10.1016/j.jmbbm.2015.12.019

Fully bioresorbable composites have been investigated in order to replace metal implant plates used for hard tissue repair. Retention of the composite mechanical properties within a physiological environment has been shown to be significantly affecte... Read More about In-situ polymerisation of fully bioresorbable polycaprolactone/phosphate glass fibre composites: in vitro degradation and mechanical properties.

Rheological techniques for determining degradation of polylactic acid in bioresorbable medical polymer systems (2015)
Presentation / Conference Contribution
Choong, G. Y., Parsons, A. J., Grant, D. M., & De Focatiis, D. S. A. (2014, June). Rheological techniques for determining degradation of polylactic acid in bioresorbable medical polymer systems. Presented at PROCEEDINGS OF PPS-30: The 30th International Conference of the Polymer Processing Society – Conference Papers, Cleveland, Ohio, USA

AIP Publishing LLC. A method developed in the 1980s for the conversion of linear rheological data to molar mab distribution is revisited in the context of degradable polymers. The method is first applied using linear rheology for a linear polystyrene... Read More about Rheological techniques for determining degradation of polylactic acid in bioresorbable medical polymer systems.

Viscosity profiles of phosphate glasses through combined quasi-static and bob-in-cup methods (2014)
Journal Article
PARSONS, A., SHARMIN, N., SHAHARUDDIN, S., & MARSHALL, M. (2015). Viscosity profiles of phosphate glasses through combined quasi-static and bob-in-cup methods. Journal of Non-Crystalline Solids, 408, 76-86. https://doi.org/10.1016/j.jnoncrysol.2014.10.014

This study used a combined viscosity approach to determine theoretical fibre drawing points for glasses in the series: xP2O5, 24MgO, 16CaO, (60-x)Na2O (x = 40,45,50,55) and yP2O5, 24MgO, 16CaO, (55-y)Na2O, 5Fe2O3 (y = 40,45,50,55). The points cannot... Read More about Viscosity profiles of phosphate glasses through combined quasi-static and bob-in-cup methods.

Mechanical, degradation and cytocompatibility properties of magnesium coated phosphate glass fibre reinforced polycaprolactone composites (2014)
Journal Article
Liu, X., Hasan, M. S., Grant, D. M., Harper, L. T., Parsons, A. J., Palmer, G., Rudd, C. D., & Ahmed, I. (2014). Mechanical, degradation and cytocompatibility properties of magnesium coated phosphate glass fibre reinforced polycaprolactone composites. Journal of Biomaterials Applications, 29(5), https://doi.org/10.1177/0885328214541302

Retention of mechanical properties of phosphate glass fibre reinforced degradable polyesters such as polycaprolactone and polylactic acid in aqueous media has been shown to be strongly influenced by the integrity of the fibre/polymer interface. A pre... Read More about Mechanical, degradation and cytocompatibility properties of magnesium coated phosphate glass fibre reinforced polycaprolactone composites.

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 (2014)
Journal Article
Sharmin, N., Parsons, A. J., Rudd, C. D., & Ahmed, I. (2014). 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. Journal of Biomaterials Applications, 29(5), 639-653. https://doi.org/10.1177/0885328214539824

© 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 phosph... Read More about 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.

Initial mechanical properties of phosphate-glass fibre-reinforced rods for use as resorbable intramedullary nails (2012)
Journal Article
Felfel, R. M., Ahmed, I., Parsons, A. J., Harper, L. T., & Rudd, C. D. (2012). Initial mechanical properties of phosphate-glass fibre-reinforced rods for use as resorbable intramedullary nails. Journal of Materials Science, 47(12), 4884-4894. https://doi.org/10.1007/s10853-012-6355-9

This paper investigates the use of novel phosphate- glass fibre-reinforced rods as resorbable intramedullary nails. Random and unidirectional fibres were moulded into composite rods by forging at ∼100 °C. Rods produced using non-woven random mats (RM... Read More about Initial mechanical properties of phosphate-glass fibre-reinforced rods for use as resorbable intramedullary nails.

Influence of screw holes and gamma sterilization on properties of phosphate glass fiber-reinforced composite bone plates (2011)
Journal Article
Han, N., Ahmed, I., Parsons, A. J., Harper, L., Scotchford, C. A., Scammell, B. E., & Rudd, C. D. (2013). Influence of screw holes and gamma sterilization on properties of phosphate glass fiber-reinforced composite bone plates. Journal of Biomaterials Applications, 27(8), 990-1002. https://doi.org/10.1177/0885328211431855

Polymers prepared from polylactic acid (PLA) have found a multitude of uses as medical devices. For a material that degrades, the main advantage is that an implant would not necessitate a second surgical event for removal. In this study, fibers produ... Read More about Influence of screw holes and gamma sterilization on properties of phosphate glass fiber-reinforced composite bone plates.

Melt-processed PLA/HA platelet nanoparticle composites produced using tailored dispersants
Presentation / Conference Contribution
Parsons, A. J., Walton, K., Hild, F., Ilchev, A., Gimeno-Fabra, M., Tomczynska, M. M., Ward, M., Canciani, A., Choong, G. Y., De Focatiis, D. S., Lester, E., Grant, D. M., & Irvine, D. J. Melt-processed PLA/HA platelet nanoparticle composites produced using tailored dispersants. Presented at The 5th International Conference of Bionic Engineering

Hydroxyapatite (HA) nanoparticles, similar to those seen in the structure of human bone, have been produced via hydrothermal synthesisand used to produce nanocomposite materials via melt blending with poly(lactic acid)(PLA). Both of these processes a... Read More about Melt-processed PLA/HA platelet nanoparticle composites produced using tailored dispersants.