Functional liquid layer enabled superior-performance of air purification filter

Functional liquid layer enabled superior-performance of air purification filter | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Functional liquid layer enabled superior-performance of air purification filter Jihong Yu, Qifei Wang, Yuheng Sheng, Xiaowei Song, Chao Shang, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4290667/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted You are reading this latest preprint version Abstract The particulate air contaminations, including particulate matters (PMs) and dangerous bioaerosols, cause adverse impact on public and thereby has prompted the development of air filtration systems. Although numerous membrane-based air filters can achieve promising filtration effects, they still suffer from decreased efficiency and short service life due to their instable surface attractive sites (e.g., electrostatic charges) and surface fouling/clogging problems. Here we show a functional liquid-mediated filtration system (LMS) constructed over fibrous matrix to overcome the conventional limitations, achieving an overall optimal filtration performance. The functional liquid layer with high surface tension and adequate liquid viscosity (e.g., glycerol) can strongly attract and adhere the contaminated particles at the interface, and ultimately retain them inside the liquid layer. Significantly, owing to the high stability of the liquid cladding over fiber matrix, the LMS displays an overall long-lasting efficiency and robustness (filtration efficiency reaching over 99% for 3 months usage without resistance increase) and its dust-holding capacity can achieve 100 g·m2 with no change on pressure drop, outperforming most of the commercial facepiece filters. Moreover, the LMS builds a defense line to the spread of respiratory diseases by efficiently filtering tiny-sized dangerous bioaerosols, such as fatal viruses and bacteria, realizing the virus (SARS-CoV-2, BetaCoV) concentration degradation for 3 orders of magnitude. The system is also resistant to the common fouling and clogging issues as the liquid filtering layer can be adjusted and regenerated to maintain its prominent functions. This work paves the way for solving the present air filtration challenges within the membrane-based filtration systems and contributes to the improvement of air purification technologies for environment and healthcare. Physical sciences/Materials science Physical sciences/Nanoscience and technology/Nanoscale materials Full Text Additional Declarations There is NO Competing Interest. Supplementary Files SupplementaryInformation.docx Supplementary Figures 1-11 & Supplementary Tables 1-6 Cite Share Download PDF Status: Under Review Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4290667","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":294836054,"identity":"d6b14fbe-9cd3-41a2-b8c9-37df1edf2050","order_by":0,"name":"Jihong 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Although numerous membrane-based air filters can achieve promising filtration effects, they still suffer from decreased efficiency and short service life due to their instable surface attractive sites (e.g., electrostatic charges) and surface fouling/clogging problems. Here we show a functional liquid-mediated filtration system (LMS) constructed over fibrous matrix to overcome the conventional limitations, achieving an overall optimal filtration performance. The functional liquid layer with high surface tension and adequate liquid viscosity (e.g., glycerol) can strongly attract and adhere the contaminated particles at the interface, and ultimately retain them inside the liquid layer. Significantly, owing to the high stability of the liquid cladding over fiber matrix, the LMS displays an overall long-lasting efficiency and robustness (filtration efficiency reaching over 99% for 3 months usage without resistance increase) and its dust-holding capacity can achieve 100 g·m2 with no change on pressure drop, outperforming most of the commercial facepiece filters. Moreover, the LMS builds a defense line to the spread of respiratory diseases by efficiently filtering tiny-sized dangerous bioaerosols, such as fatal viruses and bacteria, realizing the virus (SARS-CoV-2, BetaCoV) concentration degradation for 3 orders of magnitude. The system is also resistant to the common fouling and clogging issues as the liquid filtering layer can be adjusted and regenerated to maintain its prominent functions. 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