Magnesium coated phosphate glass fibers for unidirectional reinforcement of polycaprolactone composites

Liu, Xiaoling, Grant, David M., Palmer, Graham, Parsons, Andrew J., Rudd, Chris D., and Ahmed, Ifty (2015) Magnesium coated phosphate glass fibers for unidirectional reinforcement of polycaprolactone composites. Journal of Biomedical Materials Research Part B: Applied Biomaterials, 103 (7). pp. 1424-1432.

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Bioresorbable composites have shown much potential for bone repair applications, as they have the ability to degrade completely over time and their degradation and mechanical properties can be tailored to suit the end application. In this study, phosphate glass fiber (from the system 45% P2O5-16% CaO-24% MgO-11% Na2O-4% Fe2O3 (given in mole/0)) were used to reinforce polycaprolactone (PCL) with approximately 20% fiber volume fraction. The glass fiber surfaces were coated with magnesium (Mg) through magnetron sputtering to improve the fiber-matrix interfacial properties. The Mg coating provided a rough fiber surface (roughness (Ra) of about 44nm). Both noncoated and Mgcoated fiber-reinforced composites were assessed. The water uptake and mass loss properties for the composites were assessed in phosphate-buffered saline (PBS) at 37'C for up to 28 days, and ion release profiles were also investigated in both water and PBS media. Inhibition of media influx was observed for the Mg-coated composites. The composite mechanical properties were characterized on the basis of both tensile and flexural tests and their retention in PBS media at 37r-C was also investigated. A higher retention of the mechanical properties was observed for the Mg-coated composites over the 28 days degradation period. (C) 2014 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 1036: 1424-1432, 2015.

Item ID: 58006
Item Type: Article (Research - C1)
ISSN: 1552-4981
Keywords: magnesium coating, degradation, mechanical property, phosphate glass fiber, unidirectional composite
Copyright Information: © 2014 Wiley Periodicals Inc.
Date Deposited: 17 Apr 2019 09:23
FoR Codes: 09 ENGINEERING > 0912 Materials Engineering > 091202 Composite and Hybrid Materials @ 100%
SEO Codes: 86 MANUFACTURING > 8608 Human Pharmaceutical Products > 860899 Human Pharmaceutical Products not elsewhere classified @ 100%
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