银离子包覆电气石复合粉体的抗菌性能及机理研究

STUDY ON THE ANTIBACTERIAL PERFORMANCE AND MECHANISM OF Ag/TOURMALINE COMPOSITE POWDERS

以电气石为载体,通过真空表面浸渍制备银包覆电气石抗菌粉体,同时采用振荡烧瓶试验测试了抗菌粉体对大肠杆菌的抗菌性能,并利用X射线衍射、扫描电子显微镜、能谱仪等测试研究电气石表面银离子的赋存状态。结果表明:通过真空表面浸渍可将银包覆在电气石颗粒表面形成银包覆电气石复合粉体;银包覆量为0.4%时,该粉体大肠杆菌抑菌率可达99.99%以上。由于电气石具有自发极化性能,可将银离子固定在电气石颗粒表面从而达到缓释的作用,通过溶出的银离子与细菌作用达到抗菌目的。

Ag/tourmaline composite antibacterial powder was prepared by vacuum impregnation and the silver ion can be coated on the surface of tourmaline particle by vacuum impregnation. At same time,state of Ag analyzed by XRD,SEM and EDS indicates that silver can be carried on the surface of tourmaline due to the spontaneous polarization of tourmaline. It reveals that the composite powders have a good antibacterial ability on Escherichia coll. When the amount of mixed silver is 0.4% ,the antibacterial rate of composite powders is 〉99.99%.