载银抗菌功能膜的制备和研究

Synthesis and Analysis of Antibacterial Functional Film

摘要:

介绍了1种制备新型载银抗菌功能膜的方法。首先制备阳极氧化初级膜，然后通过特殊的着色工艺把银添加到氧化膜中，最终获得了金黄色和棕色的抗菌膜。以大肠杆菌和金黄色葡萄球菌为实验菌种，采取体外实验的方法，测试了试样的抗菌效果。通过实验发现，新制备的抗菌膜和在空气中存放24个月的抗菌膜，都具有良好的抗菌效果，而且所制备的抗菌膜具有好的颜色稳定性。对抗菌膜进行了扫描电镜、X射线光电子谱和俄歇电子谱的研究与分析，发现抗菌膜中存在多种以银元素的化合物。通过1个对比实验，计算了抗菌膜中的银量和银离子在不同介质中的释放速度。研究表明，这种工艺制备的抗菌膜具有可靠和高效的抗菌效果。

Abstract:

A method of synthesizing novel anodic alumina films with antibacterial property is presented. The process includes preparing a film by anodic oxidation of aluminum and subsequently introducing silver to the films. The antibacterial effect of such a film was estimated by in vitro tests. Escherichia Coli and Staphylococcus aureus were chosen as bacteria to test the antibacterial capacity of such films. It is found that the antibacterial effect was achieved by releasing of silver ions and the effect could be lasting for more than 24 months in atmospheric condition. Scanning electron microscopy was employed to survey antibacterial film. The chemical state of silver in the films was analyzed by X-ray photoelectron spectrum, and Auger electron spectrum was performed to determine the concentration of silver atoms in various films. Ions releasing experimental was carried out in water and the mixture of water and dilute nitric acid, the amount of silver ions releasing from the film was measured, and the total amount of silver in the films was more than 0.13 mg. This antibacterial film can be widely applied and its antibacterial effect maintained for a long time.