Multi-Unit Needleless Electrospinning for One-Step Construction of 3D Waterproof MF-PVA Nanofibrous Membranes as High-Performance Air Filters.

Authors :: Yan G
Yang Z
Li J
Li H
Wei J
Shi L
Li Z
Chen J
Wang L
Wu Y
Source :: Small (Weinheim an der Bergstrasse, Germany) [Small] 2023 Feb; Vol. 19 (7), pp. e2206403. Date of Electronic Publication: 2022 Dec 11.
Publication Year :: 2023
Abstract: The airborne particulate matter (PM) seriously threatens people's health. Personal protective equipment with electrospun nanofibers is an effective method to make people away from air pollutants. Herein, 3D waterproof melamine-formaldehyde polyvinyl alcohol (MF-PVA) nanofibrous membranes are fabricated by a one-step method combining multi-unit needleless electrospinning and a thermal treatment device in a line. 3D nanofibrous structures can be controlled by adjusting the solution concentration of each unit. The PVA nanofibrous membranes become waterproof after cross-linking with MF resin in the following thermal treatment device. The optimized MF-PVA nanofibrous membrane shows excellent air filtration performance (97.3% for PM <subscript>0.3</subscript> , 100% for PM <subscript>1.0</subscript> , and 100% for PM <subscript>2.5</subscript> ) and low air resistance (76 Pa). These 3D waterproof MF-PVA nanofibrous membranes exhibit ultra-stable performance in various practical environments.<br /> (© 2022 Wiley-VCH GmbH.)

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