包装论文：掺银纳米TiO2抗菌粉体的制备——在陶瓷包装材料中的应用

摘 要

本论文主要研究掺银nano-TiO2（Ag-Ti02）光催化抗菌粉体的制备、光催化性能、抗菌性能、及其在陶瓷包装材料中的应用。
以锐钛矿Ti02粉体为原料，经砂磨获得纳米Ti02，再分别加入AgNO3、氨水，经100℃干燥得到Ag-Ti02 、Ag+NH3-TiO2抗菌粉体。
通过对抗菌粉体的粒度、吸光度测定，耐高温试验，X射线衍射的结构表征，最低抑菌浓度（MIC）测定，分析讨论了粒度、Ag+ 含量、煅烧温度等对抗菌效果的影响。实验结果表明：平均粒径为190 nm的Ti02加3%的Ag+ 及适量氨水，获得Ag+NH3-TiO2复合抗菌剂的MIC为125 ppm，抗菌效果最好。
再将抗菌效果最好的Ag+NH3-TiO2抗菌粉体添加到釉浆中，施于陶瓷釉面，分别经700～800℃煅烧，得到抗菌陶瓷。用抑菌环法对抗菌陶瓷测定抗菌效果。结果表明：抗菌剂含量为10%的试样对大肠杆菌的抑菌环为4 mm，其抗菌效果很好，且不影响釉面质量。

关键词：纳料二氧化钛，抗菌剂，陶瓷

ABSTRACT

In this article, we mainly studies the preparation, potocatalytic capacity , antibacterial priority and the application in antibacterial ceramics of Ag-TiO2 antibacterial meterials.
In the experiments, the nano-TiO2 was prepared by physical pulverization. And then we make Ag-TiO2 and Ag+NH3-TiO2 by individully adding AgNO3 and NH3 to the nan-TiO2, which was dried at 100℃.
Measuring the size, absorbance, resistance of high temperature, X-ray diffraction characterization of the structure and MIC (minimum inhibitory concentration) of the antibacterial powder, we analyze the influence to the antibacterial properties of particle size , silver content, burning temperature and so on. The result declared that the Ag+NH3-TiO2 prepared by adding 3% Ag and suitable NH3 to the 190nm-TiO2 has the best antibacterial effect, whose MIC is only 125 ppm.
Adding Ag+NH3-TiO2, whose antibacterial effect is best ,to the glaze, daubing the glaze to ceramics, burning at 700～800℃, we obtained antibacterial ceramics, whose antibacterial effect is determined by antibacterial circle next. The result revealed that the E. coli circle of the glaze which has 10% antibacterial is 4 mm, and it didn’t affect the quality of the glaze.

Key words: nano-TiO2, antibacterial, ceramics

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