ZnO／Ag纳米复合抗菌剂的分散与性能研究

Studying on the dispersion and performances of ZnO/Ag nanocomposite antibacterial agent

以XRD、TEM、激光粒度分布对自制ZnO／Ag纳米复合抗菌剂进行表征，对其抗菌、抗藻和安全性能进行检测。结果表明：经PAAS分散后，ZnO／Ag纳米复合抗菌剂的团聚程度大大降低，分散剂PAAS的加入质量分数对ZnO／Ag纳米复合抗菌剂分散效果的影响呈抛物线状，最佳加入质量分数为48％，平均粒径为11．8nm。ZnO／Ag纳米复合抗菌剂具有优良的抗菌、抗藻和安全性能，对大肠埃希氏菌和金黄色葡萄球菌的最小抑菌浓度均为50mg／L，对小球藻菌的最小抑菌浓度为5mg／L，对小鼠的急性经口毒性的LD50为9260mg／kg，对皮肤无刺激性。

The self-made ZnO/Ag nanocomposite antibacterial agent was characterized by XRD, TEM and laser particle size distribution, its antibacterial, anti-algae and safety performance were tested. The results showed： after PAAS scattered, the aggregate of ZnO/Ag nanocomposite antibacterial agent reduced greatly, with the mass fraction of dispersant PAAS increasing the dispersion effects of ZnO/Ag nanocomposite antibacterial agent like parabola, the best accession to the mass fraction is 48%, the average diameter is 11.8 nm. ZnO/Ag nanocomposite antibacterial agent have excellent antibacterial, anti-algae and safety performance, the minimum inhibitory concentration to the Escherichia coli and Staphylococcus aureus are 50 mg/L, the minimum inhibitory concentration to the Chlorella bacteria is 5 mg/L, the acute oral toxicity taken by stomata was LD50=9260mg/kg, and it is no skin irritation.