High-quality and easy-to-regenerate personal filter
Proper respiratory tract protection is the key factor to limiting the rate of COVID-19 spread and providing a safe environment for health care workers. Traditional N95 (FFP2) respirators are not easy to regenerate and thus create certain financial and ecological burdens; moreover, their quality may vary significantly. A solution that would overcome these disadvantages is desirable. In this study a commercially available knit polyester fleece fabric was selected as the filter material, and a total of 25 filters of different areas and thicknesses were prepared. Then, the size-resolved filtration efficiency (40-400 nm) and pressure drop were evaluated at a volumetric flow rate of 95 L/min. We showed the excellent synergistic effect of expanding the filtration area and increasing the number of filtering layers on the filtration efficiency; a filter cartridge with 8 layers of knit polyester fabric with a surface area of 900 cm2 and sized 25 × 14 × 8 cm achieved filtration efficiencies of 98% at 95 L/min and 99.5% at 30 L/min. The assembled filter kit consists of a filter cartridge (14 Pa) carried in a small backpack connected to a half mask with a total pressure drop of 84 Pa at 95 L/min. In addition, it is reusable, and the filter material can be regenerated at least ten times by simple methods, such as boiling. We have demonstrated a novel approach for creating high-quality and easy-to-breathe-through respiratory protective equipment that reduces operating costs and is a green solution because it is easy to regenerate.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:17 |
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| Enthalten in: |
PloS one - 17(2022), 6 vom: 01., Seite e0268542 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Fraenkl, Max [VerfasserIn] |
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| Links: |
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| Themen: |
Aerosols |
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| Anmerkungen: |
Date Completed 10.06.2022 Date Revised 16.07.2022 published: Electronic-eCollection Citation Status MEDLINE |
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| doi: |
10.1371/journal.pone.0268542 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a Proper respiratory tract protection is the key factor to limiting the rate of COVID-19 spread and providing a safe environment for health care workers. Traditional N95 (FFP2) respirators are not easy to regenerate and thus create certain financial and ecological burdens; moreover, their quality may vary significantly. A solution that would overcome these disadvantages is desirable. In this study a commercially available knit polyester fleece fabric was selected as the filter material, and a total of 25 filters of different areas and thicknesses were prepared. Then, the size-resolved filtration efficiency (40-400 nm) and pressure drop were evaluated at a volumetric flow rate of 95 L/min. We showed the excellent synergistic effect of expanding the filtration area and increasing the number of filtering layers on the filtration efficiency; a filter cartridge with 8 layers of knit polyester fabric with a surface area of 900 cm2 and sized 25 × 14 × 8 cm achieved filtration efficiencies of 98% at 95 L/min and 99.5% at 30 L/min. The assembled filter kit consists of a filter cartridge (14 Pa) carried in a small backpack connected to a half mask with a total pressure drop of 84 Pa at 95 L/min. In addition, it is reusable, and the filter material can be regenerated at least ten times by simple methods, such as boiling. We have demonstrated a novel approach for creating high-quality and easy-to-breathe-through respiratory protective equipment that reduces operating costs and is a green solution because it is easy to regenerate | ||
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| 700 | 1 | |a Krbal, Milos |e verfasserin |4 aut | |
| 700 | 1 | |a Houdek, Jakub |e verfasserin |4 aut | |
| 700 | 1 | |a Zmrhalova, Zuzana Olmrova |e verfasserin |4 aut | |
| 700 | 1 | |a Prokes, Borivoj |e verfasserin |4 aut | |
| 700 | 1 | |a Hejda, Petr |e verfasserin |4 aut | |
| 700 | 1 | |a Slang, Stanislav |e verfasserin |4 aut | |
| 700 | 1 | |a Prikryl, Jan |e verfasserin |4 aut | |
| 700 | 1 | |a Ondracek, Jakub |e verfasserin |4 aut | |
| 700 | 1 | |a Makes, Otakar |e verfasserin |4 aut | |
| 700 | 1 | |a Kostyk, Juraj |e verfasserin |4 aut | |
| 700 | 1 | |a Nasadil, Petr |e verfasserin |4 aut | |
| 700 | 1 | |a Malcik, Pavel |e verfasserin |4 aut | |
| 700 | 1 | |a Zdimal, Vladimir |e verfasserin |4 aut | |
| 700 | 1 | |a Vlcek, Miroslav |e verfasserin |4 aut | |
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