1
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Weiter L, Leyer S, Duchowski JK. Enhancement of Filtration Performance Characteristics of Glass Fiber-Based Filter Media, Part 1: Mechanical Modification with Electrospun Nanofibers. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2209. [PMID: 38793281 PMCID: PMC11123098 DOI: 10.3390/ma17102209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 04/23/2024] [Accepted: 04/25/2024] [Indexed: 05/26/2024]
Abstract
Various modifications of standard glass fiber filtration media using electrospun PA66 nanofibers are described. PA66 were selected because they were readily available from commercial sources. Other polymers, such as PP, PET and PBT, could also be used. The first set of samples was prepared by mixing the nanofibers at two, three and five weight percent with glass fibers, and the second by laying the same proportion of the nanofibers directly onto the downstream side of the substrate. The aim of these modifications was to improve the three most basic functionalities of filter media, the separation efficiency, the differential pressure (ΔP) and the dirt holding capacity (DHC). The modified media samples were evaluated with the standard textile characterization techniques and filtration performance evaluation procedures. The results showed differences in the several tens of percentage points achieved with the two modification methods. Moreover, additional differences in performance were observed depending on the percentage of nanofibers admixed to the substrate. These differences were most apparent in the filtration efficiency and the DHC, both by several percentage points, with no apparent effect on the ∆P. The results strongly suggest that the preparation of new filter media by incorporating nanofibers directly into the matrix can result in significant improvements in filtration performance characteristics.
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Affiliation(s)
- Laura Weiter
- Faculty of Science, Technology and Communication, University of Luxembourg, 4365 Luxembourg, Luxembourg; (L.W.); (S.L.)
| | - Stephan Leyer
- Faculty of Science, Technology and Communication, University of Luxembourg, 4365 Luxembourg, Luxembourg; (L.W.); (S.L.)
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2
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Wang F, Wang S, Liu Y, Ouyang S, Sun D, Yang X, Li J, Wu Z, Qian J, Zhao Z, Wang L, Jia C, Ma S. Cellulose Nanofiber-Based Triboelectric Nanogenerators for Efficient Air Filtration in Harsh Environments. NANO LETTERS 2024; 24:2861-2869. [PMID: 38408922 DOI: 10.1021/acs.nanolett.3c05089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Advanced portable healthcare devices with high efficiencies, small pressure drops, and high-temperature resistance are urgently desired in harsh environments with high temperatures, high humidities, and high levels of atmospheric pollution. Triboelectric nanogenerators (TENGs), which serve as energy converters in a revolutionary self-powered sensor device, present a sustainable solution for meeting these requirements. In this work, we developed a porous negative triboelectric material by synthesizing ZIF-8 on the surface of a cellulose/graphene oxide aerogel, grafting it with trimethoxy(1H,1H,2H,2H-heptadecafluorodecyl)silane, and adding a negative corona treatment, and it was combined with a positive triboelectric material to create a cellulose nanofiber-based TENG self-powered filter. The devices achieved a balance between a small pressure drop (53 Pa) and high filtration efficiency (98.97%, 99.65%, and 99.93% for PM0.3, PM0.5, and PM1, respectively), demonstrating robust filtration properties at high temperatures and high humidities. Our work provides a new approach for developing self-powered wearable healthcare devices with excellent air filtration properties.
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Affiliation(s)
- Feijie Wang
- Jiangsu Provincial Key Laboratory of Food Advanced Manufacturing Equipment Technology, School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China
| | - Suyang Wang
- Jiangsu Provincial Key Laboratory of Food Advanced Manufacturing Equipment Technology, School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China
| | - Yichi Liu
- Jiangsu Provincial Key Laboratory of Food Advanced Manufacturing Equipment Technology, School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China
| | - Shiqiang Ouyang
- Jiangsu Provincial Key Laboratory of Food Advanced Manufacturing Equipment Technology, School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China
| | - Danni Sun
- Jiangsu Provincial Key Laboratory of Food Advanced Manufacturing Equipment Technology, School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China
| | - Xiaoye Yang
- Jiangsu Provincial Key Laboratory of Food Advanced Manufacturing Equipment Technology, School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China
| | - Jinmin Li
- Jiangsu Provincial Key Laboratory of Food Advanced Manufacturing Equipment Technology, School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China
| | - Zhen Wu
- Jiangsu Provincial Key Laboratory of Food Advanced Manufacturing Equipment Technology, School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China
| | - Jing Qian
- Jiangsu Provincial Key Laboratory of Food Advanced Manufacturing Equipment Technology, School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China
| | - Zhicheng Zhao
- College of Textile Science and Engineering, Jiangnan University, Wuxi 214122, China
| | - Liqiang Wang
- Jiangsu Provincial Key Laboratory of Food Advanced Manufacturing Equipment Technology, School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China
| | - Chao Jia
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Shufeng Ma
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
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3
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Hossain M, Karmakar K, Sarkar P, Chattaraj T, Rao KDM. Self-Sanitization in a Silk Nanofibrous Network for Biodegradable PM 0.3 Filters with In Situ Joule Heating. ACS OMEGA 2024; 9:9137-9146. [PMID: 38434843 PMCID: PMC10905722 DOI: 10.1021/acsomega.3c08020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 01/23/2024] [Accepted: 02/05/2024] [Indexed: 03/05/2024]
Abstract
In the contemporary way of life, face masks are crucial in managing disease transmission and battling air pollution. However, two key challenges, self-sanitization and biodegradation of face masks, need immediate attention, prompting the development of innovative solutions for the future. In this study, we present a novel approach that combines controlled acid hydrolysis and mechanical chopping to synthesize a silk nanofibrous network (SNN) seamlessly integrated with a wearable stainless steel mesh, resulting in the fabrication of self-sanitizable face masks. The distinct architecture of face masks showcases remarkable filtration efficiencies of 91.4, 95.4, and 98.3% for PM0.3, PM0.5, and PM1.0, respectively, while maintaining a comfortable level of breathability (ΔP = 92 Pa). Additionally, the face mask shows that a remarkable thermal resistance of 472 °C cm2 W-1 generates heat spontaneously at low voltage, deactivating Escherichia coli bacteria on the SNN, enabling self-sanitization. The SNN exhibited complete disintegration within the environment in just 10 days, highlighting the remarkable biodegradability of the face mask. The unique advantage of self-sanitization and biodegradation in a face mask filter is simultaneously achieved for the first time, which will open avenues to accomplish environmentally benign next-generation face masks.
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Affiliation(s)
| | | | - Prakash Sarkar
- School of Applied & Interdisciplinary
Sciences, Indian Association for the Cultivation
of Science, Jadavpur, Kolkata 700032, India
| | - Tiyasi Chattaraj
- School of Applied & Interdisciplinary
Sciences, Indian Association for the Cultivation
of Science, Jadavpur, Kolkata 700032, India
| | - K. D. M. Rao
- School of Applied & Interdisciplinary
Sciences, Indian Association for the Cultivation
of Science, Jadavpur, Kolkata 700032, India
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4
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Yang Y, Li X, Zhou Z, Qiu Q, Chen W, Huang J, Cai W, Qin X, Lai Y. Ultrathin, ultralight dual-scale fibrous networks with high-infrared transmittance for high-performance, comfortable and sustainable PM 0.3 filter. Nat Commun 2024; 15:1586. [PMID: 38383519 PMCID: PMC10881466 DOI: 10.1038/s41467-024-45833-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 02/05/2024] [Indexed: 02/23/2024] Open
Abstract
Highly permeable particulate matter (PM) can carry various bacteria, viruses and toxics and pose a serious threat to public health. Nevertheless, current respirators typically sacrifice their thickness and base weight for high-performance filtration, which inevitably causes wearing discomfort and significant consumption of raw materials. Here, we show a facile yet massive splitting eletrospinning strategy to prepare an ultrathin, ultralight and radiative cooling dual-scale fiber membrane with about 80% infrared transmittance for high-protective, comfortable and sustainable air filter. By tailoring antibacterial surfactant-triggered splitting of charged jets, the dual-scale fibrous filter consisting of continuous nanofibers (44 ± 12 nm) and submicron-fibers (159 ± 32 nm) is formed. It presents ultralow thickness (1.49 μm) and base weight (0.57 g m-2) but superior protective performances (about 99.95% PM0.3 removal, durable antibacterial ability) and wearing comfort of low air resistance, high heat dissipation and moisture permeability. Moreover, the ultralight filter can save over 97% polymers than commercial N95 respirator, enabling itself to be sustainable and economical. This work paves the way for designing advanced and sustainable protective materials.
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Affiliation(s)
- Yuchen Yang
- Qingyuan Innovation Laboratory, Quanzhou, 362801, P. R. China
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, P. R. China
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, P. R. China
| | - Xiangshun Li
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, P. R. China
| | - Zhiyong Zhou
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, P. R. China
| | - Qiaohua Qiu
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, P. R. China
- College of Textile Science and Engineering, Zhejiang Sci-Tech University, Hangzhou, 310018, P. R. China
| | - Wenjing Chen
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, P. R. China
| | - Jianying Huang
- Qingyuan Innovation Laboratory, Quanzhou, 362801, P. R. China
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Weilong Cai
- Qingyuan Innovation Laboratory, Quanzhou, 362801, P. R. China
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Xiaohong Qin
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, P. R. China.
| | - Yuekun Lai
- Qingyuan Innovation Laboratory, Quanzhou, 362801, P. R. China.
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, P. R. China.
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5
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Liu H, Lai W, Shi Y, Tian L, Li K, Bian L, Xi Z, Lin B. One-Step Fast Fabrication of Electrospun Fiber Membranes for Efficient Particulate Matter Removal. Polymers (Basel) 2024; 16:209. [PMID: 38257008 PMCID: PMC10818706 DOI: 10.3390/polym16020209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 01/04/2024] [Accepted: 01/08/2024] [Indexed: 01/24/2024] Open
Abstract
Rapid social and industrial development has resulted in an increasing demand for fossil fuel energy, which increases particulate matter (PM) pollution. In this study, we employed a simple one-step electrospinning technique to fabricate polysulfone (PSF) fiber membranes for PM filtration. A 0.3 g/mL polymer solution with an N,N-dimethylformamide:tetrahydrofuran volume ratio of 3:1 yielded uniform and bead-free PSF fibers with a diameter of approximately 1.17 μm. The PSF fiber membrane exhibited excellent hydrophobicity and mechanical properties, including a tensile strength of 1.14 MPa and an elongation at break of 116.6%. Finally, the PM filtration performance of the PSF fiber membrane was evaluated. The filtration efficiencies of the membrane for PM2.5 and PM1.0 were approximately 99.6% and 99.2%, respectively. The pressure drops were 65.0 and 65.2 Pa, which were significantly lower than those of commercial air filters. Using this technique, PSF fiber membrane filters can be easily fabricated over a large area, which is promising for numerous air filtration systems.
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Affiliation(s)
- Huanliang Liu
- Tianjin Institute of Environmental and Operational Medicine, Tianjin 300050, China; (H.L.); (W.L.); (Y.S.); (L.T.); (K.L.); (L.B.)
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment & Food Safety, Tianjin 300050, China
| | - Wenqing Lai
- Tianjin Institute of Environmental and Operational Medicine, Tianjin 300050, China; (H.L.); (W.L.); (Y.S.); (L.T.); (K.L.); (L.B.)
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment & Food Safety, Tianjin 300050, China
| | - Yue Shi
- Tianjin Institute of Environmental and Operational Medicine, Tianjin 300050, China; (H.L.); (W.L.); (Y.S.); (L.T.); (K.L.); (L.B.)
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment & Food Safety, Tianjin 300050, China
| | - Lei Tian
- Tianjin Institute of Environmental and Operational Medicine, Tianjin 300050, China; (H.L.); (W.L.); (Y.S.); (L.T.); (K.L.); (L.B.)
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment & Food Safety, Tianjin 300050, China
| | - Kang Li
- Tianjin Institute of Environmental and Operational Medicine, Tianjin 300050, China; (H.L.); (W.L.); (Y.S.); (L.T.); (K.L.); (L.B.)
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment & Food Safety, Tianjin 300050, China
| | - Liping Bian
- Tianjin Institute of Environmental and Operational Medicine, Tianjin 300050, China; (H.L.); (W.L.); (Y.S.); (L.T.); (K.L.); (L.B.)
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment & Food Safety, Tianjin 300050, China
| | - Zhuge Xi
- Tianjin Institute of Environmental and Operational Medicine, Tianjin 300050, China; (H.L.); (W.L.); (Y.S.); (L.T.); (K.L.); (L.B.)
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment & Food Safety, Tianjin 300050, China
| | - Bencheng Lin
- Tianjin Institute of Environmental and Operational Medicine, Tianjin 300050, China; (H.L.); (W.L.); (Y.S.); (L.T.); (K.L.); (L.B.)
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment & Food Safety, Tianjin 300050, China
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6
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Chyzhykov D, Widziewicz-Rzońca K, Błaszczak M, Rogula-Kopiec P, Słaby K. Automatic weighing system vs. manual weighing precision comparison in PM-loaded filter measurements under different humidity conditions. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:1393. [PMID: 37906283 PMCID: PMC10618374 DOI: 10.1007/s10661-023-11939-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 10/05/2023] [Indexed: 11/02/2023]
Abstract
Currently, there is a lack of research directly comparing the precision of automatic weighing systems and manual weighing in the context of particulate matter (PM) filter equilibration and measurements under different humidity conditions. During experimental measurements, three different types of PM-loaded filters were weighed using manual and automatic balances. During manual weighing, every filter was weighed twice in three different relative humidity conditions. The same procedure was done using an automated weighing system. In most cases, it was found that under relative humidities in the range of 30-55% RH, the manual and automated methods can be treated as referential. Regarding device stability, very slight but overall better precision was found for 30% RH, suggesting that 40 CFR Part 50, Appendix L requirements regarding conditioning humidity (30-40% RH) seem more suitable than those presented in the PN-EN 12341:2014 standard (45-50% RH). Understanding the effects of the influence of the RH% on PM mass measurements is a matter of great importance, because water vapor condensed on a filter can affect the particulate matter concentrations. This is especially important in areas where regulatory limits are exceeded. Calculation of uncertainty in the PM mass measurements is therefore crucial for determining the actual sample mass and improving air monitoring practices. In a nutshell, the experimental results obtained clearly describe how changing RH% conditions affect the PM weighing precision during manual and automated measurements.
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Affiliation(s)
- Dmytro Chyzhykov
- Institute of Environmental Engineering, Polish Academy of Sciences, 34 M. Skłodowskiej-Curie St, 41-819, Zabrze, Poland
| | - Kamila Widziewicz-Rzońca
- Institute of Environmental Engineering, Polish Academy of Sciences, 34 M. Skłodowskiej-Curie St, 41-819, Zabrze, Poland.
| | - Monika Błaszczak
- Institute of Environmental Engineering, Polish Academy of Sciences, 34 M. Skłodowskiej-Curie St, 41-819, Zabrze, Poland
| | - Patrycja Rogula-Kopiec
- Institute of Environmental Engineering, Polish Academy of Sciences, 34 M. Skłodowskiej-Curie St, 41-819, Zabrze, Poland
| | - Krzysztof Słaby
- Institute of Environmental Engineering, Polish Academy of Sciences, 34 M. Skłodowskiej-Curie St, 41-819, Zabrze, Poland
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7
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Bagaria P, Mahapatra PS, Bherwani H, Pandey R. Environmental management: a country-level evaluation of atmospheric particulate matter removal by the forests of India. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:1306. [PMID: 37828295 DOI: 10.1007/s10661-023-11928-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 09/30/2023] [Indexed: 10/14/2023]
Abstract
Particulate matter (PM) is a critical air pollutant, responsible for an array of ailments leading to premature mortality worldwide. Nature-based solutions for mitigation of PM and especially role of forests in mitigating PM from an ecosystem perspective are less explored. Forests provide a natural pollution abatement strategy by providing a surface area for the deposition of PM. Depending on their structure and composition, forests have varying capacities for PM adsorption, which is again less explored. Hence, in the present study, we evaluate the removal capacity of PM by the forest-type groups of India. Deposition flux and total PM removal across sixteen forest types were estimated based on the 2019 dataset of PM using Modern-Era Retrospective analysis for Research and Applications, Version 2 (MERRA-2) data. Externality values and PM removal costs by industrial equipment were used for associating an economic value to the air pollution abatement service by forests. The total PM2.5 removal by forests in 2019 was estimated to be 1361.28 tons and PM10 was estimated to be 303,658.27 tons. Deposition of PM was found to be high in littoral and swamp forests, tropical semi-evergreen forests, tropical moist deciduous forests, and sub-tropical pine forests. Tropical dry deciduous forests had the highest net weight % removal of PM with 39% removal for PM2.5 and 39% removal for PM10. The air pollution abatement service by forests for PM removal was 188 M US dollars (USD) with externality-based removal service by forests of 2009 M USD. The net PM removed by all forests of India was estimated to be approximately worth ₹ 470-648 Crore (59-81 million dollars) for PM2.5 and worth ₹56,746-1,22,617 Crore (7093-15,327 million dollars) for PM10 based on valuation using value transfer method. The study concludes that forests can be a significant contributor to PM reduction at a global level. Especially for India's National Clean Air Programme and further research and policy considerations, the findings would be extremely useful.
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Affiliation(s)
| | | | | | - Rajiv Pandey
- Indian Council of Forestry Research and Education, Dehradun, India.
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8
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Saleh WM, Ahmad MI, Yahya EB, H P S AK. Nanostructured Bioaerogels as a Potential Solution for Particulate Matter Pollution. Gels 2023; 9:575. [PMID: 37504454 PMCID: PMC10379271 DOI: 10.3390/gels9070575] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 06/08/2023] [Accepted: 06/15/2023] [Indexed: 07/29/2023] Open
Abstract
Particulate matter (PM) pollution is a significant environmental and public health issue globally. Exposure to high levels of PM, especially fine particles, can have severe health consequences. These particles can come from a variety of sources, including natural events like dust storms and wildfires, as well as human activities such as industrial processes and transportation. Although an extensive development in air filtration techniques has been made in the past few years, fine particulate matter still poses a serios and dangerous threat to human health and to our environment. Conventional air filters are fabricated from non-biodegradable and non-ecofriendly materials which can cause further environmental pollution as a result of their excessive use. Nanostructured biopolymer aerogels have shown great promise in the field of particulate matter removal. Their unique properties, renewable nature, and potential for customization make them attractive materials for air pollution control. In the present review, we discuss the meaning, properties, and advantages of nanostructured aerogels and their potential in particulate matter removal. Particulate matter pollution, types and sources of particulate matter, health effect, environmental effect, and the challenges facing scientists in particulate matter removal are also discussed in the present review. Finally, we present the most recent advances in using nanostructured bioaerogels in the removal of different types of particulate matter and discuss the challenges that we face in these applications.
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Affiliation(s)
- Wafa Mustafa Saleh
- Environmental Technology Division, School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Mardiana Idayu Ahmad
- Environmental Technology Division, School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia
- Renewable Biomass Transformation Cluster, School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Esam Bashir Yahya
- Bioprocess Technology Division, School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia
- Green Biopolymer, Coatings and Packaging Cluster, School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Abdul Khalil H P S
- Green Biopolymer, Coatings and Packaging Cluster, School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia
- Bioresource Technology Division, School of Industrial Technology, Universiti Sains Malaysia, Penang 11800, Malaysia
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9
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Song JY, Kim S, Park J, Park SM. Highly Efficient, Dual-Functional Self-Assembled Electrospun Nanofiber Filters for Simultaneous PM Removal and On-Site Eye-Readable Formaldehyde Sensing. ADVANCED FIBER MATERIALS 2023; 5:1088-1103. [PMID: 37235136 PMCID: PMC9996567 DOI: 10.1007/s42765-023-00279-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 02/21/2023] [Indexed: 05/25/2023]
Abstract
Air pollution containing particulate matter (PM) and volatile organic compounds has caused magnificent burdens on individual health and global economy. Although advances in highly efficient or multifunctional nanofiber filters have been achieved, many existing filters can only deal with one type of air pollutant, such as capturing PM or absorbing and detecting toxic gas. Here, highly efficient, dual-functional, self-assembled electrospun nanofiber (SAEN) filters were developed for simultaneous PM removal and onsite eye-readable formaldehyde sensing fabricated on a commercial fabric mask. With the use of an electrolyte solution containing a formaldehyde-sensitive colorimetric agent as a collector during electrospinning, the one-step fabrication of the dual-functional SAEN filter on commercial masks, such as a fabric mask and a daily disposable mask, was achieved. The electrolyte solution also allowed the uniform deposition of electrospun nanofibers, thereby achieving the high efficiency of PM filtration with an increased quality factor up to twice that of commercial masks. The SAEN filter enabled onsite and eye-readable formaldehyde gas detection by changing its color from yellow to red under a 5 ppm concentrated formaldehyde gas atmosphere. The repetitive fabrication and detachment of the SAEN filter on a fabric mask minimized the waste of the mask while maintaining high filtration efficiency by replenishing the SAEN filters and reusing the fabric mask. Given the dual functionality of SAEN filters, this process could provide new insights into designing and developing high performance and dual-functional electrospun nanofiber filters for various applications, including individual protection and indoor purification applications. Graphical Abstract Supplementary Information The online version contains supplementary material available at 10.1007/s42765-023-00279-3.
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Affiliation(s)
- Jin Yeong Song
- School of Mechanical Engineering, Pusan National University, 63-2 Busan University-Ro, Geumjeong-Gu, Busan, 46241 South Korea
| | - Seongmin Kim
- School of Mechanical Engineering, Pusan National University, 63-2 Busan University-Ro, Geumjeong-Gu, Busan, 46241 South Korea
| | - Jaeseong Park
- School of Mechanical Engineering, Pusan National University, 63-2 Busan University-Ro, Geumjeong-Gu, Busan, 46241 South Korea
| | - Sang Min Park
- School of Mechanical Engineering, Pusan National University, 63-2 Busan University-Ro, Geumjeong-Gu, Busan, 46241 South Korea
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10
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Gao Y, Tian E, Mo J. Electrostatic Polydopamine-Interface-Mediated (e-PIM) filters with tuned surface topography and electrical properties for efficient particle capture and ozone removal. JOURNAL OF HAZARDOUS MATERIALS 2023; 441:129821. [PMID: 36067559 DOI: 10.1016/j.jhazmat.2022.129821] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 08/16/2022] [Accepted: 08/20/2022] [Indexed: 06/15/2023]
Abstract
Ambient particulate matter (PM) poses severe environmental health risks to the public globally, and efficient filtration technologies are urgently needed for air ventilation. In this contribution, to overcome the efficiency-resistance trade-off for fibrous filtration, we introduced an electrostatic polydopamine-interface-mediated (e-PIM) filter utilizing a combined effect of particle pre-charging and filter polarizing. After delineating the PM-fiber interactions in electrostatic filtration, we designed a composite fiber structure and fabricated the filters by a two-step dip-coating. The surface topography and electrical potential of the polyester (PET) coarse substrates were regulated by successively coating polydopamine (PDA) layers and manganese oxide clusters. By this means, an 8-mm-thick Mn-P @ P-100 filter possessed improved efficiency of 96.05%, 97.60%, and 99.14% for 0.3-0.5 µm, 0.5-1 µm, and 1-3 µm particles, the ultralow air resistance of 10.4 Pa at a filtration velocity of 0.5 m/s, and steady ozone removal property. Compared with the pristine PET substrates, the efficiency for 0.3-0.5 µm particles expanded 12 times. Compared with the pristine PET substrates, the efficiency for 0.3-0.5 µm particles expanded 12 times. We expect e-PIM filters and the filtration prototype will be potential candidates as effective and low-cost air cleaning devices for a sustainable and healthy environment.
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Affiliation(s)
- Yilun Gao
- Department of Building Science, Tsinghua University, Beijing 100084, China; Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Beijing 100084, China
| | - Enze Tian
- Songshan Lake Materials Laboratory, Dongguan 523808, China; State Key Laboratory for Surface Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
| | - Jinhan Mo
- Department of Building Science, Tsinghua University, Beijing 100084, China; Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Beijing 100084, China; Key Laboratory of Eco Planning & Green Building, Ministry of Education (Tsinghua University), Beijing 100084, China.
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11
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Zhao K, Ren C, Lu Y, Zhang Q, Wu Q, Wang S, Dai C, Zhang W, Huang J. Cellulose nanofibril/PVA/bamboo activated charcoal aerogel sheet with excellent capture for PM2.5 and thermal stability. Carbohydr Polym 2022; 291:119625. [DOI: 10.1016/j.carbpol.2022.119625] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 05/10/2022] [Accepted: 05/12/2022] [Indexed: 01/11/2023]
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Wang H, Bao Y, Yang X, Lan X, Guo J, Pan Y, Huang W, Tang L, Luo Z, Zhou B, Yao J, Chen X. Study on Filtration Performance of PVDF/PUL Composite Air Filtration Membrane Based on Far-Field Electrospinning. Polymers (Basel) 2022; 14:polym14163294. [PMID: 36015550 PMCID: PMC9414131 DOI: 10.3390/polym14163294] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 08/03/2022] [Accepted: 08/08/2022] [Indexed: 11/16/2022] Open
Abstract
At present, the situation of air pollution is still serious, and research on air filtration is still crucial. For the nanofiber air filtration membrane, the diameter, porosity, tensile strength, and hydrophilicity of the nanofiber will affect the filtration performance and stability. In this paper, based on the far-field electrospinning process and the performance effect mechanism of the stacked structure fiber membrane, nanofiber membrane was prepared by selecting the environmental protection, degradable and pollution-free natural polysaccharide biopolymer pullulan, and polyvinylidene fluoride polymer with strong hydrophobicity and high impact strength. By combining two kinds of fiber membranes with different fiber diameter and porosity, a three-layer composite nanofiber membrane with better hydrophobicity, higher tensile strength, smaller fiber diameter, and better filtration performance was prepared. Performance characterization showed that this three-layer composite nanofiber membrane had excellent air permeability and filtration efficiency, and the filtration efficiency of particles above PM 2.5 reached 99.9%. This study also provides important reference values for the preparation of high-efficiency composite nanofiber filtration membrane.
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Affiliation(s)
- Han Wang
- State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China
| | - Yiliang Bao
- State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China
| | - Xiuding Yang
- State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China
| | - Xingzi Lan
- State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China
| | - Jian Guo
- State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China
| | - Yiliang Pan
- State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China
- Foshan Nanofiberlabs Co., Ltd., Foshan 528225, China
| | - Weimin Huang
- School of Mechanics and Astronautics, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Linjun Tang
- State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhifeng Luo
- State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China
| | - Bei Zhou
- State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China
| | - Jingsong Yao
- State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China
| | - Xun Chen
- State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China
- Correspondence:
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Cheng S, Hao W, Wang Y, Wang Y, Yang S. Commercial Janus Fabrics as Reusable Facemask Materials: A Balance of Water Repellency, Filtration Efficiency, Breathability, and Reusability. ACS APPLIED MATERIALS & INTERFACES 2022; 14:32579-32589. [PMID: 35794731 DOI: 10.1021/acsami.2c09544] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Facemasks as personal protective equipment play a significant role in helping prevent the spread of viruses during the COVID-19 pandemic. A desired reusable fabric facemask should strike a balance of water repellency, good filtration efficiency (FE), breathability, and mechanical robustness against washing cycles. Despite significant efforts in testing various commercial fabric materials for filtration efficiency, few have investigated fabric performance as a function of the fiber/yarn morphology and wettability of the fabric itself. In this study, we examine commercial fabrics with Janus-like behaviors to determine the best reusable fabric facemask materials by understanding the roles of morphology, porosity, and wettability of the fabric on its overall performance. We find that the outer layer of the diaper fabric consisted of laminated polyurethane, which is hydrophobic, has low porosity (∼5%) and tightly woven yarn structures, and shows the highest overall FE (up to 54%) in the submicron particle size range (0.03-0.6 μm) among the fabrics tested. Fabric layers with higher porosity lead to lower-pressure drops, indicating higher breathability but lower FE. Tightly woven waterproof rainwear fabrics perform the best after 10 washing cycles, remaining intact morphologically with only a 2-5% drop in the overall FE in the submicron particle size range, whereas other knitted fabric layers become loosened and the laminated polyurethane thin film on the diaper fabric is wrinkled. In comparison, the surgical masks and N95 respirators made from nonwoven polypropylene (PP) fibers see over a 30% decline in the overall FE after 10 washing cycles. Overall, we find that tightly woven Janus fabrics consisting of a low porosity, a hydrophobic outer layer, and a high porosity and hydrophilic inner layer offer the best performance among the fabrics tested as they can generate a high overall FE, achieve good breathability, and maintain fabric morphology and performance over multiple washing cycles.
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Affiliation(s)
- Steven Cheng
- Department of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut St, Philadelphia, Pennsylvania 19104, United States
| | - Weixing Hao
- Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, Missouri 65409, United States
| | - Yuchen Wang
- Department of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut St, Philadelphia, Pennsylvania 19104, United States
| | - Yang Wang
- Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, Missouri 65409, United States
| | - Shu Yang
- Department of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut St, Philadelphia, Pennsylvania 19104, United States
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Experimental Research on Dynamic Filtering Characteristics of Filter Materials for Electrostatic-Fabric Integrated Precipitator. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12125824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In recent years, the electrostatic-fabric integrated precipitator has been widely used, and the dust filtration performance of the core component filter bag is the most important factor affecting its dust removal efficiency. In this work, the dynamic dust removal performance of different types of filter media and different experimental conditions were studied on the filter media filtration performance test platform. The experimental study of the filtration performance of different types of filter media showed that the filtration performance stability of polyphenylene sulfide (PPS) filter media was better than that of polyimide (PI) and polytetrafluoroethylene (PTFE) filter media. Increasing the mass per unit area of the filter media had obvious advantages in the short term, and the impregnation process was beneficial to the filter performance of the filter media. Membrane-coated filter media had the best filtration performance, gradient filter media filtration performance was the second, followed by conventional filter media, ordinary blended, and ultrafine blended filter media. Studies with different experimental conditions found that the filtration efficiency increased with increasing resistance, was not significantly affected by changes in inlet dust concentration, but decreased with the increasing filtering velocity. This experimental results provided an important basis for the selection of filter bags for the electrostatic-fabric integrated precipitator project.
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Wang Y, Su Y, Yang L, Su M, Niu Y, Liu Y, Sun H, Zhu Z, Liang W, Li A. Highly efficient removal of PM and VOCs from air by a self-supporting bifunctional conjugated microporous polymers membrane. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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