聚丙烯微孔膜表面AgCl修饰层的构建及其抗菌性

Fabrication of AgCl Modification Layer on Microporous Polypropylene Membrane and Its Antibacterial Property

通过多巴胺氧化聚合修饰及交替浸渍技术在聚丙烯微孔膜(MPPM)表面构建了Ag Cl修饰层。采用FTIR、XPS对构建过程膜表面的化学变化进行了分析;采用SEM-EDX对膜表面形态及Ag Cl分布进行了考察;通过表面水接触角及水通量的测定分析了膜的亲水性;采用平板活菌计数法评价了膜对大肠杆菌及金黄色葡萄球菌的抗菌能力。结果表明,制得的修饰膜具有强的抗菌能力和良好的表面亲水性,其对大肠杆菌和金黄色葡萄球菌的抗菌率分别达99.2%和100%。

In order to endow microporous polypropylene membrane （MPPM） with antibacterial capability and improve MPPM surface hydrophilicity, AgC1 modification layer was fabricated on MPPM via dopamine oxypolymerization and alternate soaking technique. The chemical change of the membranes in the fabrication process was analyzed by F17R and XPS. The surface morphology and AgC1 distribution of the membranes were investigated by SEM-EDX. The surface hydrophilicity of the membranes was analyzed by the combination of water contact angle and water flux. The antibacterial capabilities of the membranes for E. coli and S. aureus were evaluated via plate counting method. The results indicate that the modified membranes have strong antibacterial capability and favorable hydrophilicity, and that their antibacterial rate for E. coli and S. aureus are 99.2% and 100% ,respectively.