摘要
含Cu奥氏体抗菌不锈钢经特殊的抗菌热处理析出ε-Cu相,采用覆膜法研究其抗菌性能。实验结果表明:奥氏体抗菌不锈钢易于杀灭大肠杆菌和金黄色葡萄球菌;杀灭鼠伤寒杆菌需要一定时间;杀灭白色念株菌需要较长时间。这与细菌的细胞壁组织结构、细胞壁厚度及其属性有关。抗菌不锈钢对细胞壁较薄、肽聚糖含量较低、组织疏松、金属离子易穿透细胞壁的细菌易于杀灭;反之,细菌不易于杀灭。随着抗菌作用时间的延长,溶液中铜离子浓度的提高,抗菌不锈钢的杀菌效力显著提高。奥氏体抗菌不锈钢经表面打磨或磨损仍然具有同样的抗菌性能。
Cu-contained antibacterial austenite stainless steel educed ε-Cu after special antibacterial heat treatment, the antibacterial properties of this kind stainless steel were studied by the cover membrane method. The results of antibacterial experiment showed that the antibacterial austenite stainless steel was easy to kill bacillus coli and staphylococcus aureus; it needed more time to kill Bacillus typhimurium and Candida alblcans. These phenomena were concerned with the structures and compositions of cell walls of different bacteria. The bacteria with thin cell walls, low-content peptidoglycans and relatively loose organizations had poor resistance to ε-Cu because of metal ion penetrating the cell wall easily, Vice versa. With the prolongation of antibacterial action time, and the enhancement of the cupric ion density, the sterilization function of antibacterial stainless steels increased remarkably. In addition, the antibacterial austenite stainless steel still had the same antibacterial performance when the metallic surface wore away or was polished.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2008年第5期669-672,共4页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目(50675171)
陕西省科技攻关计划资助项目(2005K06-G13)
关键词
抗菌不锈钢
奥氏体
抗菌性能
Ε-CU相
antibacterial stainless steel
austenite
antibacterial property
ε-Cu phase
