title: Mechanical and degradation properties of biodegradable Mg strengthened poly-lactic acid composite through plastic injection molding.
abstract: Full biodegradable magnesium alloy (AZ31) strengthened poly-lactic acid (PLA) composite rods for potential application for bone fracture fixation were prepared by plastic injection process in this work. Their surface/interfacial morphologies, mechanical properties and vitro degradation were studied. In comparison with untreated Mg rod, porous MgO ceramic coating on Mg surface formed by Anodizing (AO) and micro-arc-oxidation (MAO)treatment can significantly improve the interfacial binding between outer PLA cladding and inner Mg rod due to the micro-anchoring action, leading to better mechanical properties and degradation performance of the composite rods.With prolonging immersion time in simulated body fluid (SBF) solution until 8weeks, the MgO porous coating were corroded gradually, along with the disappearance of original pores and the formation of a relatively smooth surface. This resulted in a rapidly reduction in mechanical properties for corresponding composite rods owing to the weakening of interfacial binding capacity. The present results indicated that this new PLA-clad Mg composite rods show good potential biomedical applications for implants and instruments of orthopedic inner fixation.
authors: School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing, 211189, Jiangsu, China; Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, Jiangsu, China.
authors: Muhammad Shoaib
authors: MS
authors: Butt
authors: School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing, 211189, Jiangsu, China; Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, Jiangsu, China. Electronic address: baijing@seu.edu.cn.
authors: Jing
authors: J
authors: Bai
authors: School of Mechanical Engineering, Nantong University, Nantong 226019, Jiangsu, China.
authors: Xiaofeng
authors: X
authors: Wan
authors: School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing, 211189, Jiangsu, China; Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, Jiangsu, China.
authors: Chenglin
authors: C
authors: Chu
authors: School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing, 211189, Jiangsu, China; Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, Jiangsu, China.
authors: Feng
authors: F
authors: Xue
authors: Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huaian 223003, Jiangsu.
authors: Hongyan
authors: H
authors: Ding
authors: Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huaian 223003, Jiangsu.
authors: Guanghong
authors: G
authors: Zhou
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D001826:Body Fluids; D004566:Electrodes; D006859:Hydrogen / Q000032:analysis; D007267:Injections; D008274:Magnesium / Q000737:chemistry*; D055595:Mechanical Phenomena; D010084:Oxidation-Reduction; D010969:Plastics / Q000737:chemistry*; D011091:Polyesters / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength; D013997:Time Factors; D014961:X-Ray Diffraction
chemical_list: D001672:Biocompatible Materials; D010969:Plastics; D011091:Polyesters; C033616:poly(lactide); D006859:Hydrogen; D008274:Magnesium
keywords: Coating; Composite rod; Degradation; Magnesium alloy; Plastic injection molding; Poly-lactic-acid