Abstract
AbstractBACKGROUNDThe highin vivocorrosion rate of magnesium alloy vascular stents is a primary problem. SmoothTiO2film has excellent antithrombotic properties and could improve the corrosion resistance of magnesium alloy stents. Research into special nanostructuredTiO2film, which may provide improved biocompatibility and act as a drug carrier, has seldom been reported in vascular stent applications.RESULTSFlower‐like nanostructuredTiO2film was prepared on Mg‐Zn‐Y‐Nd alloy substrate by an improved solvothermal method. AqueousNH4Fsolution and hydrofluoric acid were added to ethanol solvent to adjust the hydrolysis rate of titanium butoxide, and thus theTiO2nanostructure size. This reaction system was suitable for magnesium alloy due to its non‐corrosive characteristic. Under properly chosen hydrolysis conditions, compactTiO2film consisting of continuous flower‐like nanostructures was obtained on substrate, with single sheet thickness of 50–100 nm. The charge transfer resistance of Mg‐Zn‐Y‐Nd alloy in simulated body fluids was increased about 40 times by the nanostructuredTiO2film.CONCLUSIONSThrough a solvothermal synthesis process, nanostructuredTiO2film can be prepared on the surface of Mg‐Zn‐Y‐Nd alloy. Corrosion resistance of Mg‐Zn‐Y‐Nd alloy in simulated body fluids can be improved by protection with theTiO2film. © 2013 Society of Chemical Industry
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