Abstract
Serving as matrices, polypropylene (PP) melt-blown nonwoven fabrics with 4% electrostatic electret masterbatch were incorporated with a 6%, 10%, 14%, or 18% phosphorus-nitrogen flame retardant. The test results indicate that the incorporation of the 6% flame retardant prevented PP melt-blown nonwoven fabrics from generating a molten drop, which, in turn, hampers the secondary flame source while increasing the fiber diameter ratio. With a combination of 4% electrostatic electret masterbatch and the 6% flame retardant, PP melt-blown nonwoven fabrics were grafted with ZIF-8 and Ag@ZIF-8. The antibacterial effect of ZIF-8 and Ag@ZIF-8 was 40% and 85%, respectively. Moreover, four reinforcing measures were used to provide Ag@ZIF-8 PP melt-blown nonwoven fabrics with synergistic effects, involving lamination, electrostatic electret, and Ag@ZIF-8 grafting, as well as a larger diameter because of the addition of phosphorus-nitrogen flame retardants. As specified in the GB2626-2019 and JIS T8151-2018 respiratory resistance test standards, with a constant 60 Pa, Ag@ZIF-8 PP melt-blown nonwoven membranes were tested for a filter effect against PM 0.3. When the number of lamination layers was five, the filter effect was 88 ± 2.2%, and the respiratory resistance was 51 ± 3.6 Pa.
Highlights
Melt-blowing nonwoven fabrics is an advanced production technique used to create ultrafine fibers out of a polymer melts, drawn from the mold of a screw extruder, the polymer undergoes high-speed hot air jet stretching, and the ultrafine fibers are entangled and aligned randomly in a turbulent airflow, forming nonwoven fabrics that are suitable for diverse applications, including air filtration [1], oil–water separation [2], tissue engineering [3], heavy metal adsorption [4], sound insulation materials [5], and battery separators [6]
Melt-blown nonwoven fabrics that consist of ultrafine fibers in a randomly entangled structure ensure an excellent air filtration effect
With quasipermanent electric charges on the fibers and additional electrostatic attraction, show a higher initial filtration efficiency and a much lower pressure drop compared to mechanical high-efficiency particulate air (HEPA) filters
Summary
Melt-blowing nonwoven fabrics is an advanced production technique used to create ultrafine fibers out of a polymer melts, drawn from the mold of a screw extruder, the polymer undergoes high-speed hot air jet stretching, and the ultrafine fibers are entangled and aligned randomly in a turbulent airflow, forming nonwoven fabrics that are suitable for diverse applications, including air filtration [1], oil–water separation [2], tissue engineering [3], heavy metal adsorption [4], sound insulation materials [5], and battery separators [6]. Following the spread of COVID-19, airborne viruses will permanently contaminate human society and so will other pollutants, e.g., PM 2.5 To address this issue, melt-blown nonwoven fabrics that consist of ultrafine fibers in a randomly entangled structure ensure an excellent air filtration effect. With quasipermanent electric charges on the fibers and additional electrostatic attraction, show a higher initial filtration efficiency and a much lower pressure drop compared to mechanical high-efficiency particulate air (HEPA) filters. Melt-blown cloth electrostatic electret equipment is a special type of equipment that generates static electricity It offers a stable output voltage, comprehensive protection, simple operation, high efficiency, low flow resistance, antibacterial properties, and energy saving. It guarantees the physical collision blocking effect of conventional filter materials and increased electrostatic adsorption. The nanosilver antibacterial agent was purchased from Xing Zhou Chemicals Co., (Ltd., Shanghai, China)
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