Enhanced air filtration performances by coating aramid nanofibres on a melt-blown nonwoven. Issue 2 (22nd December 2021)

• Record Type: Journal Article
• Authors: Xu, Kangli; Zhan, Lei; Yan, Rui; Ke, Qinfei; Yin, Anlin; Huang, Chen
• Is Part Of: Nanoscale. Volume 14:Issue 2(2022)
• Page Start: 419
• Page End: 427
• Publication Date: 2021-12-22
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/d1nr06159c
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : The preparation cycle of ANF/DMSO is shortened by simply increasing the preparation temperature. The composite filter fabricated by coating ANFs on a melt-blown nonwoven shows excellent air filtration performances. Abstract : Nanofibre membranes with a small diameter and a large specific surface area are widely used in the filtration field due to their small pore size and high porosity. To date, aramid nanofibres (ANFs) have received extensive research interest because of their high stiffness and excellent temperature resistance. However, the preparation of ANFs usually takes a long time, which greatly hampers the practical application of these fibres. Herein, we report the preparation of ANFs by a modified deprotonation method at elevated temperature. Owing to the increase of temperature, the preparation cycle of ANFs was shortened to 8 hours. The resulting ANF dispersion was further coated on a polypropylene melt-blown nonwoven to form a composite nonwoven filter. With the submicron porous structure, the filtration efficiency, pressure drop and quality factor of the filter were 95.61%, 38.22 Pa and 0.082 Pa −1, respectively. Compared to the pristine nonwoven, the filtration, mechanical, and heat insulation properties of the composite filter were also significantly improved. This work may offer a simple and efficient way for enhancing the air filtration performances of current filters.