纳米Ag·SiO_2添加剂对涂料在金黄色葡萄球菌环境中防腐性能的影响  

Effect of Nano-Ag·SiO_2 Additive on the Corrosion Resistance of Coatings against Staphylococcus Aureus

作　　者：张新生[1] 王洁欣[1] 乐园[1] 陈建峰[1] 

机构地区：[1]北京化工大学纳米材料先进制备技术与应用科学教育部重点实验室教育部超重力工程研究中心,北京100029

出　　处：《涂料工业》2011年第7期1-4,共4页Paint & Coatings Industry

基　　金：国家自然科学基金(No.20821004);国家863计划(No.2009AA033301)

摘　　要：研究了添加不同颜基比(P/B)纳米Ag.SiO2对环氧树脂涂层在金黄色葡萄球菌环境中防腐性能的影响。利用原子力显微镜(AFM)观察了涂层在金黄色葡萄球菌溶液中浸泡前的表面形貌,测试了涂层浸泡前后的交流阻抗谱(EIS)。结果表明:添加纳米Ag.SiO2由于增加了涂层多孔性而导致其阻抗不同程度下降,P/B为0.3%时涂层的阻抗降至106Ω.cm2以下,基本失去了保护作用;在金黄色葡萄球菌溶液浸泡过程中纳米Ag.SiO2的杀菌作用开始显现,浸泡后未添加纳米Ag.SiO2涂层的耐蚀性能直线下降,而P/B为0.1%时涂层的耐蚀性能基本保持不变。The influence of nano - Ag·SiO2 additive with different P/B ratios on the corrosion resistance of epoxy coatings against Staphylococcus aureus （ S. aureus） was studied. The surface morphology of the coatings was observed by atomic force microscope （AFM） before immersion in S. aureus solution, and electrochemical impedance spectroscopy （EIS） of the coatings was investigated before and after the immersion. The results showed that the resistances of the coatings were decreased gradually due to the increase of its po- rosity with addition of nano - Ag·SiO2 , and that of the coating with P/B =0.3% was below 106 ~~＇cm2, losing its protective performance. The bactericidal action of nano - Ag· SiO2 during immersion in S. aureus solution played an important role. After immersion the resistance of the coating without nano - Ag·SiO2 dropped significantly and that of the coating with P/B = 0. 1% remained at the same level.

关 键 词：纳米Ag·SiO2 涂层 金黄色葡萄球菌 原子力显微镜 交流阻抗谱 

分 类 号：TQ630.4[化学工程—精细化工]