目的 制备兼具抗菌适用性广谱和良好经济效益的新型抗菌剂,并进一步研究其抗菌机理.方法 将稀土氯化镧和纳米ZnO结合在一起,以稀土氯化镧和纳米ZnO为原料经超声波分散,搅拌、烘干、煅烧等一系列手段制备稀土复合抗菌涂料,并考查溶液pH值、焙烧温度和实验反应温度三个因素对抗菌剂抗菌性能的影响.采用抑菌圈法比较La3 +/ZnO抗菌剂,纳米ZnO和稀土氯化镧三者的抗菌性能,运用SEM等微观手段分析稀土复合抗菌剂增强的原因,结果 当pH为5.0,焙烧温度为180℃,试验温度为37℃时,La3 +/ZnO复合抗菌粉对革兰氏阴性大肠杆菌和革兰氏阳性金黄色葡萄球菌的混合细菌的抗菌率为94％.结论 稀土复合抗菌剂具有很好的抗菌性能,其抗菌性能增强的原因是La3+进入ZnO晶格内多方面协同作用的结果.%The paper aims to prepare the and-bacterial broad-spectrum applicability and good economic benefits of the antibacterial agent for the earth antibacterial agent antibacterial mechanism research. Rare earth lanthanum chloride and nanometer ZnO is used as the raw material. The rare earth composite antibacterial coatings are obtained by ultrasonic dispersion, mixing, drying, calcination and a series of means of preparation. Also, we investigate pH value of the solution,reaction temperature of calcination temperature and experiment of three factors on the antibacterial properties. Using by the bacteriostatic circle method, we compare three antibacterial properties among La3 +/ZnO antibacterial agents,nanometer ZnO and rare earth lanthanum chloride,and use SEM microstructure by means of the analysis of rare earth compound antibacterial agent causes enhanced. When PH was 5, calcination temperature of 180 DEG C,the test temperature of 37 ℃, La3 + /ZnO composite antimicrobial agents against Gram-negative Escherichia coli and gram-positive Staphy-lococcus aureus mixed bacterial antimicrobial properties rate is 94%. Rare earth compound antimicrobial a-gent has good antibacterial property,its antibacterial performance is enhanced due to the La3* into the ZnO lattice within the manifold of the synergistic effect.
展开▼
