Novel bi-layered nanostructured SiO2/Ag-FHAp coating on biodegradable magnesium alloy for biomedical applications

被引：57

作者：

Bakhsheshi-Rad, H. R. ^{[1
,2
]}

Hamzah, E. ^{[1
]}

Ismail, A. F. ^{[3
]}

Kasiri-Asgarani, M. ^{[2
]}

Daroonparvar, M. ^{[1
]}

Parham, S. ^{[4
]}

Iqbal, N. ^{[5
]}

Medraj, M. ^{[6
,7
]}

机构：

[1] Univ Teknol Malaysia, Dept Mat Mfg & Ind Engn, Fac Mech Engn, Johor Baharu 81310, Johor, Malaysia

[2] Islamic Azad Univ, Najafabad Branch, Dept Mat Engn, Adv Mat Res Ctr, Najafabad, Iran

[3] Univ Teknol Malaysia, Adv Membrane Technol Res Ctr AMTEC, Johor Baharu 81310, Johor, Malaysia

[4] Univ Teknol Malaysia, Ibnu Sina Inst Sci & Ind Res, Ctr Sustainable Nanomat, Utm Skudai 81310, Johor, Malaysia

[5] Univ Teknol Malaysia, Fac Biosci & Med Engn, Med Devices & Technol Grp MEDITEG, Johor Baharu 81310, Johor, Malaysia

[6] Concordia Univ, Dept Mech Engn, 1455 De Maisonneuve Blvd West, Montreal, PQ H3G 1M8, Canada

[7] Masdar Inst, Mech & Mat Engn, POB 54224, Abu Dhabi, U Arab Emirates

来源：

CERAMICS INTERNATIONAL | 2016年 / 42卷 / 10期

关键词：

Magnesium alloy; Nanostructured coating; Microstructure; Cytocompatibility; Bio-corrosion resistance; HYDROXYAPATITE COATINGS; FLUORIDATED HYDROXYAPATITE; ANTIMICROBIAL ACTIVITY; DOPED HYDROXYAPATITE; MG ALLOY; CORROSION; FABRICATION; COMPOSITE; BIOCOMPATIBILITY; DEPOSITION;

D O I：

10.1016/j.ceramint.2016.04.119

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

081705 [工业催化]; 082905 [生物质能源与材料];

摘要：

In this study, a novel bi-layered nanostructured silica (SiO2)/silver-doped fluorohydroxyapatite (Ag-FHAp) coating was deposited on biodegradable Mg-1.2Ca-4.5Zn alloy via physical vapor deposition (PVD) combined with electrodeposition (ED). The nano-SiO2 underlayer had a compact columnar microstructure with thickness of around 1 pm while the Ag-FHAp overlayer presented large plate-like crystals accompanied with small rounded particles with thickness about 10 mu m. Potentiodynamic polarization test exhibited that the double layer SiO2/Ag-FHAp coated Mg alloy has superior corrosion resistance compared to uncoated and single layer SiO2 coated samples. Contact angle measurement showed that Ag-FHAp coating over nano-SiO2 layers significantly increased surface wettability which is favorable for the attachment of cells. Cytotoxicity tests indicated that the nanostructured SiO2/Ag-FHAp coating enabled higher cell viability compared to nano-SiO2 coating and uncoated samples. In addition, bi-layer and single-layer coatings considerably improved the ability of cell attachment than that of the uncoated samples. The cell viability of coated and uncoated samples increased with increasing incubation time. The double layer SiO2/Ag-FHAp coated biodegradable Mg alloy possessed high corrosion resistance and cytocompatibility and can be considered as a promising material for implant applications. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：11941 / 11950

页数：10

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