硅酸盐学报

镁合金表面介孔45S5生物玻璃陶瓷涂层的制备及体外降解性能

作者：黄凯蔡舒任萌果王雪欣张睿悦

分类号：TG174.453; R318.08

出版年,卷(期):页码：2014,42(7):846-850

DOI：10.7521/j.issn.0454－5648.2014.07.06

摘要：

以三嵌段共聚物F127为模板剂，采用溶胶－凝胶法在AZ31镁合金表面制备了介孔45S5生物玻璃陶瓷涂层。通过扫描电子显微镜和比表面积测试等方法表征了涂层的表面形貌和介孔结构，探讨了F127在介孔结构形成中的作用机理以及介孔对涂层性能的影响，并通过浸泡实验研究了镁合金及其涂层在模拟体液(SBF)中的降解行为。结果表明：制得的涂层表面均匀、无裂纹，与基体形成良好的界面结合。在模拟体液中，该涂层能够显著地降低镁合金基体的腐蚀速率和诱导羟基磷灰石的沉积，有效地改善镁合金的耐蚀性和生物活性。

Mesoporous 45S5 bioactive glass－ceramic coating was prepared on magnesium alloy substrates with triblock copolymer F127 as a template by a sol－gel method. The surface morphology and mesoporous structure of the coating was characterized by scanning electron microscopy and nitrogen adsorption analysis for specific surface area. The effect of F127 on the mesopore formation and the effect of mesoporous structure on the coating were analyzed. The degradation behavior of magnesium alloy and its coatings in a simulated body fluid (SBF) was investigated via immersion tests. The results show that the as－prepared coating is uniform and crack－free, with a good interface bonding to the substrate. The coating can reduce the corrosion rate of magnesium alloy and induce the apatite deposition in the SBF, thus effectively improving the corrosion resistance and the bioactivity.

基金项目：

国家自然科学基金(51372166)。

作者简介：

第一作者：黄　凯(1988—)，男，硕士研究生。通信作者：蔡　舒(1965—)，女，教授。

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