Newest research: nanofibers with well-studied durable antibacterial properties recommended as excellent materials for water and air filtration

The main aims of the research were to produce efficient nanofibrous filters with long-term antibacterial properties and to confirm the functionality of samples under real filtration conditions. A polyurethane solution was modified by micro- or nanoparticles of copper oxide in order to juxtapose the aggregation tendency of particles depending on their size. Modified solutions were electrospun by the Nanospider technique. The roller spinning electrode with a needle surface and static wire electrode were used for the production of functionalized nanofibers. The antibacterial properties of the modified nanofibrous layers were studied under simulated conditions of water and air filtration. Particular attention was paid to the fixation mechanism of modifiers in the structure of filters. It was determined that the rotating electrode with the needle surface is more efficient for the spinning of composite solutions due to the continuous mixing and the avoidance of particle precipitation at the bottom of the bath with modified polyurethane. Moreover, it was possible to state that microparticles of copper oxide are more appropriate antimicrobial additives due to their weaker aggregation tendency but stronger fixation in the fibrous structure than nanoparticles. From the results, it is possible to conclude that nanofibers with well-studied durable antibacterial properties may be recommended as excellent materials for water and air filtration applications.

该研究的主要目的是生产具有长期抗菌特性的高效纳米纤维过滤器，并在实际过滤条件下确认样品的功能。用氧化铜的微颗粒或纳米颗粒对聚氨酯溶液进行改性，以便根据颗粒的大小并置颗粒的聚集趋势。修饰的溶液通过Nanospider技术进行电纺。具有针表面的辊式纺丝电极和静电丝电极用于生产功能化的纳米纤维。在水和空气过滤的模拟条件下研究了改性纳米纤维层的抗菌性能。特别关注了过滤器结构中修饰剂的固定机理。已确定具有针表面的旋转电极对复合溶液的纺丝更有效，这是由于连续混合并避免了用改性聚氨酯在浴槽底部沉淀出颗粒。此外，有可能指出氧化铜微粒是更合适的抗微生物添加剂，因为它们比纳米微粒具有更弱的聚集趋势，但在纤维结构中的固定作用更强。从结果可以得出结论，具有良好研究耐久抗菌性能的纳米纤维可能被推荐作为用于水和空气过滤应用的优秀材料。

Published: 2021

Journal ：Molecules (Basel, Switzerland)

Impact Factor：3.309

Paper link: https://www.mdpi.com/1420-3049/26/5/1255