Fabrication of multilayer cellulose filters isolated from natural biomass for highly efficient air filtration for replacement of synthetic HEPA filters
Issued Date
2025-02-01
Resource Type
ISSN
09575820
Scopus ID
2-s2.0-85211430014
Journal Title
Process Safety and Environmental Protection
Volume
194
Start Page
216
End Page
230
Rights Holder(s)
SCOPUS
Bibliographic Citation
Process Safety and Environmental Protection Vol.194 (2025) , 216-230
Suggested Citation
Sawatdee S., Botalo A., Noinonmueng T., Posoknistakul P., Intra P., Pongchaikul P., Charnnok B., Chanlek N., Laosiripojana N., Wu K.C.W., Sakdaronnarong C. Fabrication of multilayer cellulose filters isolated from natural biomass for highly efficient air filtration for replacement of synthetic HEPA filters. Process Safety and Environmental Protection Vol.194 (2025) , 216-230. 230. doi:10.1016/j.psep.2024.12.007 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/102747
Title
Fabrication of multilayer cellulose filters isolated from natural biomass for highly efficient air filtration for replacement of synthetic HEPA filters
Author's Affiliation
Rajamangala University of Technology Lanna
Faculty of Medicine Ramathibodi Hospital, Mahidol University
Yuan Ze University
Mahidol University
National Health Research Institutes Taiwan
King Mongkut's University of Technology Thonburi
Prince of Songkla University
National Taiwan University
Synchrotron Light Research Institute (Public Organization)
Faculty of Medicine Ramathibodi Hospital, Mahidol University
Yuan Ze University
Mahidol University
National Health Research Institutes Taiwan
King Mongkut's University of Technology Thonburi
Prince of Songkla University
National Taiwan University
Synchrotron Light Research Institute (Public Organization)
Corresponding Author(s)
Other Contributor(s)
Abstract
Indoor air pollution can be extensively reduced by using a molecular air filtration system. However, widely utilized synthetic polymer-based filtration medium can lead to waste management difficulty after use. Consequently, this work aimed to synthesize highly efficient air nano-filters derived from renewable and biodegradable resources namely EFB and Pulp. The study successfully presented an air filter from 100 % natural cellulose using a facile physical multilayer filter fabrication method. A combination of chemical and mechanical treatment was applied to prepare nanocellulose. The chemical composition analysis showed that 66–67 % nanocellulose yield was efficiently isolated from both raw materials. The highest particle filtration efficiency (PFE) of 97.30 % (0.3 μm particle size) greater than that of commercial HEPA filters was achieved from multilayer acid-derived microfiber@mechanically treated nanofibers from EFB with low-pressure drop of 11.56 mm H2O. When %PFE and pressure drop were taken into consideration, all single-layer and multilayer-patterned fiber filters in this study provided high quality factor (QF) beyond 0.01 Pa−1 which is the target of the air filter. The findings revealed that the pattern-layer filters through TBA-induced freezing-drying technique could achieve the removal of microbial model and Particulate Matters (PM1.0) represented as 0.1 and 0.3 μm particles, at the very low-pressure drop. Therefore, this study not only enhances the value of natural lignocellulosic wastes but also presents inspiring concepts for creating biodegradable cellulose-based air filters that will pave the way to more eco-friendliness and sustainability for synthetic filter replacement.