Wang Jizhen, Liu Shaoyang, Yan Xu, Jiang Zhan, Zhou Zijing, Liu Jing, Han Guangting, Ben Haoxi, Jiang Wei
College of Textile and Clothing, Qingdao University, #308 Ningxia Road, Qingdao 266071, China.
Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, #308 Ningxia Road, Qingdao 266071, China.
Membranes (Basel). 2021 Dec 24;12(1):23. doi: 10.3390/membranes12010023.
Environmentally friendly face masks with high filtration efficiency are in urgent need to fight against the COVID-19 pandemic, as well as other airborne viruses, bacteria and particulate matters. In this study, coaxial electrospinning was employed to fabricate a lithium chloride enhanced cellulose acetate/thermoplastic polyurethanes (CA/TPU-LiCl) face mask nanofiber filtration membrane, which was biodegradable and reusable. The analysis results show that the CA/TPU-LiCl membrane had an excellent filtration performance: when the filtration efficiency reached 99.8%, the pressure drop was only 52 Pa. The membrane also had an outstanding reusability. The filtration performance maintained at 98.2% after 10 test cycles, and an alcohol immersion disinfection treatment showed no effect on its filtration performance. In summary, the CA/TPU-LiCl nanofiber membrane made in this work is a promising biodegradable and reusable filtration material with a wide range of potential applications, including high-performance face mask.
为抗击新冠疫情以及抵御其他空气传播病毒、细菌和颗粒物，急需具有高过滤效率的环保口罩。在本研究中，采用同轴静电纺丝法制备了氯化锂增强型醋酸纤维素/热塑性聚氨酯（CA/TPU-LiCl）口罩纳米纤维过滤膜，该膜具有生物可降解和可重复使用的特性。分析结果表明，CA/TPU-LiCl膜具有优异的过滤性能：当过滤效率达到99.8%时，压降仅为52帕。该膜还具有出色的可重复使用性。经过10次测试循环后，过滤性能保持在98.2%，酒精浸泡消毒处理对其过滤性能没有影响。综上所述，本工作制备的CA/TPU-LiCl纳米纤维膜是一种很有前景的生物可降解且可重复使用的过滤材料，具有广泛的潜在应用，包括高性能口罩。
