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为提高镁合金的耐蚀性,并且使其表面具有抗菌功能,从而抑制生物膜的形成和生物腐蚀,利用原位水热法在AZ31镁合金基体上制备氢氧化镁膜以及层层组装制备硫酸庆大霉素(GS)和聚苯乙烯磺酸钠(PSS)多层膜。利用扫描电子显微镜、傅里叶红外光谱、X射线光电子能谱、电化学测试和浸泡实验研究(PSS/GS)nMg复合膜层的表面形貌、化学成分和耐腐蚀性能。最后,通过抑菌圈实验和平板计数法评定(PSS/GS)nMg样品抵抗金黄葡萄球菌的性能。结果表明,在镁合金表面制备的复合膜层表现出较好的耐蚀和抗菌性能。这种复合膜层可用作医疗植入器件涂层。
In order to improve the corrosion resistance of magnesium alloy, and to make it have antimicrobial function on the surface, so as to inhibit the formation of biofilm and bio-corrosion, the magnesium hydroxide film was prepared on AZ31 magnesium alloy by in-situ hydrothermal method and the layers were assembled to prepare sulfuric acid Gentamycin (GS) and Sodium Polystyrene Sulfonate (PSS) Multilayer Film. The surface morphology, chemical composition and corrosion resistance of (PSS / GS) nMg composite coatings were investigated by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, electrochemical tests and immersion experiments. Finally, (PSS / GS) nMg samples were evaluated for resistance against Staphylococcus aureus by zone of inhibition and plate counting. The results show that the composite film prepared on the surface of magnesium alloy shows good corrosion resistance and antibacterial properties. This composite film can be used as a medical implant device.