High-Quality and Easy-to-Regenerate Personal Filter
High-Quality and Easy-to-Regenerate Personal Filter
Abstract 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.
Vlcek Miroslav、Hejda Petr、Fraenkl Max、Krbal Milos、Makes Otakar、Slang Stanislav、Zmrhalova Zuzana Olmrova、Prokes Borivoj、Nasadil Petr、Ondracek Jakub、Zdimal Vladimir、Prikryl Jan、Kostyk Juraj、Houdek Jakub、Malcik Pavel
Center of Materials and Nanotechnologies, Faculty of Chemical Technology, University of PardubiceCenter of Materials and Nanotechnologies, Faculty of Chemical Technology, University of PardubiceCenter of Materials and Nanotechnologies, Faculty of Chemical Technology, University of PardubiceCenter of Materials and Nanotechnologies, Faculty of Chemical Technology, University of PardubiceInstitute of Chemical Process Fundamentals, v.v.i., Academy of Sciences of the Czech RepublicCenter of Materials and Nanotechnologies, Faculty of Chemical Technology, University of PardubiceCenter of Materials and Nanotechnologies, Faculty of Chemical Technology, University of PardubiceCenter of Materials and Nanotechnologies, Faculty of Chemical Technology, University of PardubiceTextile Testing InstituteInstitute of Chemical Process Fundamentals, v.v.i., Academy of Sciences of the Czech RepublicInstitute of Chemical Process Fundamentals, v.v.i., Academy of Sciences of the Czech RepublicCenter of Materials and Nanotechnologies, Faculty of Chemical Technology, University of PardubiceInstitute of Chemical Process Fundamentals, v.v.i., Academy of Sciences of the Czech RepublicCenter of Materials and Nanotechnologies, Faculty of Chemical Technology, University of PardubiceTextile Testing Institute
预防医学环境科学理论环境污染、环境污染防治
COVID-19Filtration efficiencyRegenerationReusableLow-costPPELMICAGMP
Vlcek Miroslav,Hejda Petr,Fraenkl Max,Krbal Milos,Makes Otakar,Slang Stanislav,Zmrhalova Zuzana Olmrova,Prokes Borivoj,Nasadil Petr,Ondracek Jakub,Zdimal Vladimir,Prikryl Jan,Kostyk Juraj,Houdek Jakub,Malcik Pavel.High-Quality and Easy-to-Regenerate Personal Filter[EB/OL].(2025-03-28)[2025-06-24].https://www.medrxiv.org/content/10.1101/2021.12.16.21267766.点此复制
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