Bonfim Daniela P F, Cruz Fabiana G S, Guerra Vádila G, Aguiar Mônica L
Departamento de Engenharia Química, Federal University of São Carlos, Washington Luis Road, km 235, São Carlos, SP 13565-905, Brazil.
Membranes (Basel). 2021 Apr 19;11(4):293. doi: 10.3390/membranes11040293.
Air pollution and solid pollution are considered global problems, and endanger human health mainly due to the emission of fine particulate matter released into the atmosphere and improper disposal of post-consumer plastic bottles. Therefore, it is urgent to develop filter media to effectively protect the public. The properties of plastics make them potential candidates for nanofiber mat formers due to their attractive structural and mechanical characteristics. This work aims to produce and evaluate novel PET electrospun fibers dispensed with the use of support materials to be used as filter media to remove nanoparticles from the air. The electrospinning process was carried out by changing the concentration of the polymer solution, the needle diameter, and the electrospinning processing time at two rotation speeds. The average diameters of the micro- and nanofibers of the filter media produced ranged from 3.25 μm to 0.65 μm and it was possible to conclude that, as the size of the fibers decreased, the mechanical strength increased from 3.2 to 4.5 MPa. In filtration tests, a collection efficiency of up to 99% with low-pressure drops (19.4 Pa) was obtained for nanoparticles, demonstrating high quality factor filter media, which could be applicable in gas filtration.
空气污染和固体污染被视为全球性问题，主要由于排放到大气中的细颗粒物以及消费后塑料瓶的不当处置而危害人类健康。因此，开发有效的过滤介质以保护公众迫在眉睫。塑料因其具有吸引人的结构和机械特性，使其成为纳米纤维垫形成材料的潜在候选者。这项工作旨在生产和评估新型的聚对苯二甲酸乙二酯（PET）电纺纤维，无需使用支撑材料，用作过滤介质以去除空气中的纳米颗粒。通过在两种转速下改变聚合物溶液的浓度、针头直径和电纺加工时间来进行电纺过程。所生产的过滤介质的微纤维和纳米纤维的平均直径范围为3.25μm至0.65μm，并且可以得出结论，随着纤维尺寸减小，机械强度从3.2MPa增加到4.5MPa。在过滤测试中，对于纳米颗粒，获得了高达99%的收集效率和低压力降（19.4Pa），证明了高质量因子的过滤介质，可应用于气体过滤。
