Polylactic acid coating on a biodegradable magnesium alloy: An in vitro degradation study by electrochemical impedance spectroscopy

被引：125

作者：

Alabbasi, Alyaa ^{[1
]}

Liyanaarachchi, S. ^{[1
]}

Kannan, M. Bobby ^{[1
]}

机构：

[1] James Cook Univ, Sch Engn & Phys Sci, Discipline Chem Engn, Townsville, Qld 4811, Australia

来源：

THIN SOLID FILMS | 2012年 / 520卷 / 23期

关键词：

Polylactic acid; Magnesium alloy; Biomaterials; Biodegradation; MECHANICAL INTEGRITY; CORROSION; BEHAVIOR; POLYMERS;

D O I：

10.1016/j.tsf.2012.07.090

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

Polylactic acid (PLA) was coated on a biodegradable magnesium alloy, AZ91, using spin coating technique for temporary implant applications. The degradation behaviour of the coated alloy samples was evaluated using electrochemical impedance spectroscopy (EIS) method in simulated body fluid (SBF). EIS results suggested that the PLA coating enhanced the degradation resistance of the alloy significantly. Increase in the PLA coating thickness was found to increase the degradation resistance, but resulted in poor adhesion. Long-term EIS experiments of the PLA coated samples suggested that their degradation resistance gradually decreased with increase in SBF exposure time. However, the degradation resistance of the PLA coated samples was significantly higher than that of the bare metal even after a 48 h exposure to SBF. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：6841 / 6844

页数：4

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