载锌蒙脱石抗菌中间体的制备及镁合金表面的应用研究

发布时间：2018-06-25 07:35

  本文选题：载锌蒙脱石 + 抗菌中间体　； 参考：《功能材料》2016年07期

【摘要】：以钠化蒙脱石、硝酸锌为原料,采用液相离子交换法制备载锌蒙脱石抗菌中间体;应用响应面法设计优化工艺、扫描电镜、XRD观察载锌蒙脱石形貌、分析组成;抑菌圈及最低抑菌浓度法(MIC)研究其抗菌性能;应用水热法,在镁合金AZ31表面制备载锌蒙脱石涂层,电镜观察其形貌。结果表明,采用Design-Expert软件中的Boxbehnken设计的二次多项式模型比较显著,得出最佳优化条件,硝酸锌为4mmol,温度为80℃,时间为4.5h,蒙脱石载锌量达到94.65mg/g;扫描电镜观察载锌蒙脱石颗粒细小,呈不规则形,很少聚集成团;XRD分析发现蒙脱石片层间距由原来的1.48nm增加到1.57nm;抗菌实验表明,载锌蒙脱石对大肠杆菌和金黄色葡萄球菌具有较好的抗菌活性,MIC为6 400mg/mL;电镜观察显示,载锌蒙脱石在AZ31镁合金表面形成比较致密的1层涂层,与基体结合紧密,厚度达42μm,说明载锌蒙脱石抗菌中间体可成功应用于镁合金表面。
[Abstract]:Using sodium montmorillonite and zinc nitrate as raw materials, Zn-loaded montmorillonite antibacterial intermediates were prepared by liquid-phase ion exchange method, and optimized process was designed by response surface method. SEM and XRD were used to observe the morphology and composition of Zn-loaded montmorillonite. The antibacterial properties of magnesium alloy AZ31 were studied by the method of inhibition circle and minimum inhibitory concentration (MIC), and the Zn-loaded montmorillonite coating was prepared on the surface of magnesium alloy AZ31 by hydrothermal method, and the morphology of the coating was observed by electron microscope. The results show that the quadratic polynomial model designed by Boxbehnken in Design-Expert software is obvious, and the optimum conditions are as follows: zinc nitrate is 4 mmol, temperature is 80 鈩，

本文编号：2065169