Industrial Research Institute of Nonwovens & Technical Textiles, College of Textiles & Clothing , Qingdao University , Qingdao 266071 , Shandong , People's Republic of China.
ACS Appl Mater Interfaces. 2019 Nov 20;11(46):43188-43199. doi: 10.1021/acsami.9b15219. Epub 2019 Nov 5.
To address the challenge of high-temperature air filtration, a novel electreted polysulfonamide/polyacrylonitrile-boehmite (PSA/PAN-B) composite nanofiber based filter was developed via electrospinning for effective high-temperature dust removal. In this study, the spinnability of PSA was greatly improved by adding a small amount of PAN as an auxiliary polymer, and the introduction of a boehmite electret further significantly reinforced the properties of PSA fibers. As a result, the PSA/PAN-B membrane exhibited a high filtration efficiency (up to 99.52 ± 0.32%), low pressure drop (45.16 ± 1.39 Pa), excellent flexibility, good mechanical properties, high thermal stability (up to approximately 300 °C), and superior chemical resistance. Through data analysis and 3D simulation, the important benefits of the boehmite electret in the optimization of the PSA fibrous membrane performance were determined: it increases the charge storage capacity, constructs a rough surface morphology, improves the specific surface area, and enhances the mechanical properties. More importantly, the PSA/PAN-B film possessed a robust PM2.5 purification capacity, and the particulate matter removal efficiency was kept unchanged after high-temperature, acid, or alkali treatment-a performance derived from the intrinsic molecular structure of PSA. The PSA/PAN-B composite fibrous membrane, with excellent comprehensive properties, is a promising candidate for air filters, especially in harsh environments, further broadening the applications of PSA and providing new insight into the design of high-performance filters with high-temperature and corrosion resistance.
为了解决高温空气过滤的挑战，通过静电纺丝开发了一种新型的驻极体聚砜酰胺/聚丙烯腈-勃姆石（PSA/PAN-B）复合纳米纤维过滤器，用于有效去除高温粉尘。在这项研究中，通过添加少量的 PAN 作为辅助聚合物，极大地提高了 PSA 的可纺性，并且引入勃姆石驻极体进一步显著增强了 PSA 纤维的性能。结果，PSA/PAN-B 膜表现出高过滤效率（高达 99.52 ± 0.32%）、低压降（45.16 ± 1.39 Pa）、出色的柔韧性、良好的机械性能、高耐热稳定性（高达约 300°C）和优异的耐化学性。通过数据分析和 3D 模拟，确定了勃姆石驻极体在优化 PSA 纤维膜性能方面的重要作用：它增加了电荷存储能力，构建了粗糙的表面形貌，提高了比表面积，并增强了机械性能。更重要的是，PSA/PAN-B 薄膜具有强大的 PM2.5 净化能力，并且在高温、酸或碱处理后去除颗粒物的效率保持不变——这一性能源自 PSA 的固有分子结构。具有优异综合性能的 PSA/PAN-B 复合纤维膜是空气过滤器的有前途的候选材料，特别是在恶劣环境中，进一步拓宽了 PSA 的应用，并为设计具有耐高温和耐腐蚀性的高性能过滤器提供了新的思路。
