Composites for bone repair: phosphate glass fibre reinforced PLA with varying fibre architecture
We investigate high-modulus degradable materials intended to replace metals in biomedical applications. Resorbable composites comprising a PLA matrix reinforced with iron doped phosphate glass fibres were investigated. Non-woven random mat laminates of approximately 15%, 30% and 45% fibre volume fraction (Vf) were produced, along with unidirectional and 0o～90o samples of approximately 20% Vf. The non-woven laminates achieved maximum values of 10 GPa modulus and 120 MPa strength. The 0o-90o samples showed unexpectedly low strengths close to matrix value (about 50 MPa) but a modulus of 7 GPa. The UD specimens exhibited values of 130 MPa and 11.5 GPa for strength and modulus respectively. Modulus values were close to the rule of mixtures expectation. Samples immersed in water at 37℃ revealed rapid mechanical property loss, more so for the UD and 0o～90o samples. This may be caused by wicking resulting in deterioration of the fibre-matrix interface, with the non-wovens seeing less of an effect due to their non-continuous arrangement. Studies of pH revealed similar profiles for all the composites investigated. The initial decrease in pH was attributed to the release of phosphate ions.
PARSONS Andrew J. AHMED Ifty JONES I.Arthur SCOTCHFORD Colin A. WALKER Gavin S. RUDD Chris D
Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham,Un Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, U
国际会议
2009 International Conference on Advanced Fibers and Polymer Materials(2009年先进纤维与聚合物材料国际学术会议)
上海
英文
487-490
2009-10-21（万方平台首次上网日期，不代表论文的发表时间）