Water Desalination and Reuse Center and ‡Imaging and Characterization Lab, King Abdullah University of Science and Technology , 23955-6900 Thuwal, Kingdom of Saudi Arabia.
ACS Appl Mater Interfaces. 2014;6(21):18497-501. doi: 10.1021/am505594c. Epub 2014 Oct 15.
Silver nanoparticles were deposited on the surface and pore walls of block copolymer membranes with highly ordered pore structure. Pyridine blocks constitute the pore surfaces, complexing silver ions and promoting a homogeneous distribution. Nanoparticles were then formed by reduction with sodium borohydride. The morphology varied with the preparation conditions (pH and silver ion concentration), as confirmed by field emission scanning and transmission electron microscopy. Silver has a strong biocide activity, which for membranes can bring the advantage of minimizing the growth of bacteria and formation of biofilm. The membranes with nanoparticles prepared under different pH values and ion concentrations were incubated with Pseudomonas aeruginosa and compared with the control. The strongest biocidal activity was achieved with membranes containing membranes prepared under pH 9. Under these conditions, the best distribution with small particle size was observed by microscopy.
银纳米粒子被沉积在具有高度有序孔结构的嵌段共聚物膜的表面和孔壁上。吡啶嵌段构成孔表面，络合银离子并促进其均匀分布。然后用硼氢化钠还原形成纳米粒子。场发射扫描和透射电子显微镜证实，纳米粒子的形态随制备条件（pH 值和银离子浓度）而变化。银具有很强的杀菌活性，对于膜来说，可以带来最小化细菌生长和生物膜形成的优势。用不同 pH 值和离子浓度制备的纳米粒子的膜与对照物一起孵育铜绿假单胞菌，并进行比较。在 pH 值为 9 的条件下，杀菌活性最强。在这些条件下，通过显微镜观察到具有最佳小粒径分布的膜。
