Liu Zhiqian, Qin Linli, Liu Sijia, Zhang Jing, Wu Junhua, Liang Xinquan
School of Light Industry and Food Engineering, Guangxi University Nanning 530000 Guangxi P. R. China
Guangxi Academy of Sciences Nanning 530000 P. R. China
RSC Adv. 2022 Dec 7;12(54):34921-34930. doi: 10.1039/d2ra05798k. eCollection 2022 Dec 6.
Electrospun fiber membranes have great potential in the field of air filtration because of their high porosity and small pore size. Conventional air filtration membranes are hydrophilic, leading to weak moisture-barrier properties, which hinders their application in high-humidity environments. In this study, eugenol was added to polyvinyl alcohol and ethyl cellulose (EC) for electrospinning and electrospraying, respectively, of superhydrophobic bilayer composite fiber membranes to efficiently filter particulate matter (PM) in air. Owing to its surface microstructure, electrosprayed EC increased the water contact angle of the PVA membrane from 142.8 to 151.1°. More importantly, the composite air-filter membrane showed a low filtration pressure drop (168.1 Pa) and exhibited high filtration efficiencies of 99.74 and 99.77% for PM and PM, respectively, and their respective quality factors were 0.0351 and 0.0358 Pa. At the same time, the filtration performance of the air filtration membrane remained above 99% at high air humidity. This work reports composite membranes that can effectively capture PM of various sizes and thus may provide a reference for the manufacturing of green air filters for high-humidity environments.
由于具有高孔隙率和小孔径，电纺纤维膜在空气过滤领域具有巨大潜力。传统的空气过滤膜是亲水性的，导致防潮性能较弱，这阻碍了它们在高湿度环境中的应用。在本研究中，分别将丁香酚添加到聚乙烯醇和乙基纤维素（EC）中，用于静电纺丝和电喷雾制备超疏水双层复合纤维膜，以有效过滤空气中的颗粒物（PM）。由于其表面微观结构，电喷雾的EC将PVA膜的水接触角从142.8°提高到151.1°。更重要的是，复合空气过滤膜显示出低过滤压降（168.1 Pa），对PM和PM的过滤效率分别高达99.74%和99.77%，其各自的品质因数分别为0.0351和0.0358 Pa。同时，在高空气湿度下，空气过滤膜的过滤性能保持在99%以上。这项工作报道了能够有效捕获各种尺寸PM的复合膜，因此可为高湿度环境下绿色空气过滤器的制造提供参考。
