Magnesium coated bioresorbable phosphate glass fibres: investigation of the interface between fibre and polyester matrices.
Bioresorbable phosphate glass fibre reinforced polyester composites have been investigated as replacement for some traditional metallic orthopaedic implants, such as bone fracture fixation plates. However, composites tested revealed loss of the interfacial integrity after immersion within aqueous media which resulted in rapid loss of mechanical properties. Physical modification of fibres to change fibre surface morphology has been shown to be an effective method to improve fibre and matrix adhesion in composites. In this study, biodegradable magnesium which would gradually degrade to Mg(2+) in the human body was deposited via magnetron sputtering onto bioresorbable phosphate glass fibres to obtain roughened fibre surfaces. Fibre surface morphology after coating was observed using scanning electron microscope (SEM). The roughness profile and crystalline texture of the coatings were determined via atomic force microscope (AFM) and X-ray diffraction (XRD) analysis, respectively. The roughness of the coatings was seen to increase from 40 ± 1 nm to 80 ± 1 nm. The mechanical properties (tensile strength and modulus) of fibre with coatings decreased with increased magnesium coating thickness.
Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK.
Xiaoling
X
Liu
David M
DM
Grant
Andrew J
AJ
Parsons
Lee T
LT
Harper
Chris D
CD
Rudd
Ifty
I
Ahmed
D001672:Biocompatible Materials / Q000737:chemistry* / Q000627:therapeutic use; D005898:Glass / Q000737:chemistry; D006801:Humans; D008274:Magnesium / Q000737:chemistry* / Q000627:therapeutic use; D008855:Microscopy, Electron, Scanning; D008970:Molecular Weight; D010710:Phosphates / Q000737:chemistry; D011091:Polyesters / Q000737:chemistry; D019736:Prostheses and Implants; D013499:Surface Properties
D001672:Biocompatible Materials; D010710:Phosphates; D011091:Polyesters; C009753:fiberglass; D008274:Magnesium