氩等离子体预处理对纳米结构银非织造布抗菌性能的影响

采用磁控溅射技术，在丙纶非织造布（PP）基材表面沉积厚度为0．5-3nm的纳米结构银薄膜，重点研究了PP基材经氩等离子体预处理前后对纳米结构银薄膜抗菌性能的影响。采用振荡烧瓶法测试样品的抗菌性能，利用原子力显微镜（AFM）观察氩等离子处理前后PP基材表面的形态变化，同时应用EDX对纳米结构银薄膜进行元素分布及定量分析。实验结果表明：在纳米结构银薄膜厚度相同的条件下，经氩等离子预处理的丙纶非织造布具有更好的抗菌性能；AFM分析表明，经氩等离子处理后的纤维表面有明显的刻蚀痕迹，纤维表面凹凸不平，形成很多微小的空隙，溅射出的银粒子不易团聚，活性增加，抗菌性能因此提高；而EDX结果分析表明，抗菌性能提高是由于经氩等离子处理后，银离子溶出总量增加的缘故。

Effect of Argon Plasma Pretreatment on Antibacterial Properties of Nonwovens Coated with Silver Films

Magnetron sputtering coating technology is used to deposit nanostructured silver films with different thicknesses ranging from 0. 5nm to 3nm on PP nonwovens, and the effect of argon plasma pretreatment for PP nonwovens on antibacterial properties of the coated nonwovens is studied. The antibacterial performance is assessed using shake flask test. The surface morphologies of PP nonwovens before and after treated with argon plasma are observed with AFM. Surface elemental distribution and elemental quantitative analysis is measured employing EDX. The results show that compared with the unpretreates PP nonwovens, the ones coated with silver films with the same thickness but pretreated with plasma exhibite better antibacterial properties. The AFM images show that the process of argon plasma treatment results in the formation of obvious etch dot and flute on PP fibers, thus the sputtered silver particles are hard to cluster, leading to the increased activity of nanostruetured silver on films,which contributes to the improved antibacterial performance. The analysis of EDX indieats that after plasma pretreatment, the overall amount of silver ions released from the silver films is increased, resulting in the improved antibacterial properties.