Evaluation of filtration effectiveness of various types of facemasks following with different sterilization methods

Due to the ongoing pandemic, various types of facemasks such as certified N-95, non-woven fiber and fabric/textile masks are being used an essential protective measure reduce risk spread SARS-Cov-2 virus. The aerosols size-dependent filtration efficiency breathing resistance these were tested before after sterilization by five different methods for two flow rates (20 90 L/min) conditions corresponding regular rate moderate/strenuous exertion, in particle size range 0.3–10 µm. Sterilization techniques here autoclaving (30 60 minutes), dry air oven heating ionizing irradiation (15 25 kGy), hot water washing with without detergent immersing a 10% concentration liquid hydrogen peroxide 30 minutes. Further, each type is also studied laboratory generated two-order higher aerosol concertation. mask has most outstanding filtering among all other facemasks. radiation causes significant reduction efficacy, so that it not recommended purpose. best method sterilize N-95 affecting their performance using temperature ranging from 70–80 °C. cloth surgical found be comparable both conditions. As affordable method, recommended, which does deteriorate fabric can common people. general people textile/fabric serves fit purpose than because help non-biodegradable waste (facemask) prevent respiratory droplet transmission. sterilized heat, wash autoclave.