镁合金表面功能化需要获得具有良好耐蚀性和抗菌性的表面.基于壳聚糖与聚谷氨酸之间的静电吸附作用,利用层层组装方法在镁合金AZ31表面获得一种既耐蚀又抗菌的涂层.利用高分辨扫描电子显微镜、傅里叶红外光谱仪以及电化学测试对这种功能涂层进行了表面形貌、化学成分以及耐蚀性能表征.通过平板计数法评定该涂层耐金黄葡萄球菌的性能.结果表明,该涂层具有良好的耐蚀性与抗菌性.
Surface functionalization of magnesium (Mg) alloys is desired to obtain the surfaces with both improved corrosion resistance and antibacterial property. A corrosion-resistant and antimicrobial coating was prepared on Mg alloy surface by layer-by-layer (LbL) assembly of chitosan (CHI) and poly-L-glutamic acid (PGA) by electrostatic attraction. The functionalized surfaces of the Mg alloys were characterized by field-emission scanning electron microscopy (FE-SEM), Fourier transform infrared (FT-IR) spectroscopy and electrochemical tests. The bactericidal activity of the samples againstStaphylococcus aureus was assessed by the zone of plate-counting method. The obtained coating on the Mg alloy substrates exhibits good corrosion resistance and antibacterial performance.
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