载银介孔氧化硅防污剂的制备及其防污机理研究

The Preparation and Antifouling Mechanism of Silver Nanocrystals Encapsulated in Mesoporous Silica Nanoparticles

采用化学法制备出载银介孔氧化硅(Ag-MSN)粉体,通过扫描电镜(SEM)和透射电镜(TEM)表征纳米材料的微观形貌和尺寸,利用X射线衍射(XRD)确定纳米材料的成分并结合公式确定纳米银的粒径;通过平板培养法和分光光度计法揭示载银介孔氧化硅对于海洋微生物(需钠弧菌)的抗菌效果和机理。将载银介孔氧化硅粉体作为主要颜料与有机硅树脂复合,得到具有一定抑菌性能的涂层。该研究成果将有助于揭示纳米银防污机理,并对绿色海洋防污剂的制备与应用起到重要的促进作用。

The title silver nanocrystals encapsulated in mesoporous silica nanoparticles （ Ag - MSN） with increased stability and enhanced antibacterial potency has been prepared. The morphology of the nanoparticles was characterized by scanning electron microscopy and transmission electron microscopy. X - ray diffraction analysis indicated that the silver nanocrystals were truly embedded in the mesoporous silica nanoparticles. The antibacterial effect of silver nanoparticles was proved by plate count method and bacterial growth curve and spectrophotometer. The coatings with antibacterial properties have been gained by silicone resin using mesoporous silica containing silver as the main body of pigment. The research results will help to reveal the antifouling mechanism of nano - silver material, and to promote the development and application of new green marine antifouling coatings.