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Yang M, Li X, Yao N, Yu J, Yin X, Zhang S, Ding B. Two-Dimensional Piezoelectric Nanofibrous Webs by Self-Polarized Assembly for High-Performance PM 0.3 Filtration. ACS NANO 2024; 18:16895-16904. [PMID: 38906832 DOI: 10.1021/acsnano.4c02731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/23/2024]
Abstract
Particulate matter (PM) pollution has posed a serious threat to public health, especially the global spread of infectious diseases. Most existing air filtration materials are still subjected to a compromise between removal efficiency and air permeability on account of their stacking bulk structures. Here, we proposed a self-polarized assembly technique to create two-dimensional piezoelectric nanofibrous webs (PNWs) directly from polymer solutions. The strategy involves droplets deforming into ultrathin liquid films by inertial flow, liquid films evolving into web-like architectures by instantaneous phase inversion, and enhanced dipole alignment by cluster electrostatics. The assembled continuous webs exhibit integrated structural superiorities of nanoscale diameters (∼20 nm) of the internal fibers and through pores (∼100 nm). Combined with the wind-driven electrostatic property derived from the enhanced piezoelectricity, the PNW filter shows high efficiency (99.48%) and low air resistance (34 Pa) against PM0.3 as well as high transparency (84%), superlight weight (0.7 g m-2), and long-term stable service life. This creation of such versatile nanomaterials may offer insight into the design and upgrading of high-performance filters.
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Affiliation(s)
- Ming Yang
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China
| | - Xiaoxi Li
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China
| | - Ni Yao
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China
| | - Jianyong Yu
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China
| | - Xia Yin
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China
| | - Shichao Zhang
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China
| | - Bin Ding
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China
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2
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Guo Y, Kangwa M, Ali W, Mayer-Gall T, Gutmann JS, Zenneck C, Winter M, Jungbauer A, Fernandez Lahore HM. Moving adsorption belt system for continuous bioproduct recovery utilizing composite fibrous adsorbents. Front Bioeng Biotechnol 2023; 11:1135447. [PMID: 37324416 PMCID: PMC10267413 DOI: 10.3389/fbioe.2023.1135447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Accepted: 05/22/2023] [Indexed: 06/17/2023] Open
Abstract
A continuous protein recovery and purification system based on the true moving bed concept is presented. A novel adsorbent material, in the form of an elastic and robust woven fabric, served as a moving belt following the general designs observed in known belt conveyors. The composite fibrous material that forms the said woven fabric showed high protein binding capacity, reaching a static binding capacity equal to 107.3 mg/g, as determined via isotherm experiments. Moreover, testing the same cation exchange fibrous material in a packed bed format resulted in excellent dynamic binding capacity values (54.5 mg/g) even when operating at high flow rates (480 cm/h). In a subsequent step, a benchtop prototype was designed, constructed, and tested. Results indicated that the moving belt system could recover a model protein (hen egg white lysozyme) with a productivity up to 0.5 mg/cm2/h. Likewise, a monoclonal antibody was directly recovered from unclarified CHO_K1 cell line culture with high purity, as judged by SDS-PAGE, high purification factor (5.8), and in a single step, confirming the suitability and selectivity of the purification procedure.
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Affiliation(s)
- Yijia Guo
- School of Science, Jacobs University Bremen gGmbH, Bremen, Germany
| | - Martin Kangwa
- School of Science, Jacobs University Bremen gGmbH, Bremen, Germany
| | - Wael Ali
- Deutschen Textilforschungszentrum Nord-West gGmbH, Krefeld, Germany
- Department of Physical Chemistry, Center for Nanointegration (CENIDE), University of Duisburg-Essen, Essen, Germany
| | - Thomas Mayer-Gall
- Deutschen Textilforschungszentrum Nord-West gGmbH, Krefeld, Germany
- Department of Physical Chemistry, Center for Nanointegration (CENIDE), University of Duisburg-Essen, Essen, Germany
| | - Jochen S. Gutmann
- Deutschen Textilforschungszentrum Nord-West gGmbH, Krefeld, Germany
- Department of Physical Chemistry, Center for Nanointegration (CENIDE), University of Duisburg-Essen, Essen, Germany
| | - Claus Zenneck
- MDX Biotechnik International GmbH, Nörten-Hardenberg, Germany
| | - Martina Winter
- Department of Biotechnology, Institute of Bioprocess Science and Engineering, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Alois Jungbauer
- Department of Biotechnology, Institute of Bioprocess Science and Engineering, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Hector Marcelo Fernandez Lahore
- School of Science, Jacobs University Bremen gGmbH, Bremen, Germany
- Unit Biotechnologies, Department of Environmental Research and Innovation, Luxembourg Institute of Science and Technology, Esch-sur-Alzette, Luxembourg
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3
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Fabrication of Laminated Micro/Nano Filter and Its Application for Inhalable PM Removal. Polymers (Basel) 2023; 15:polym15061459. [PMID: 36987239 PMCID: PMC10052305 DOI: 10.3390/polym15061459] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/12/2023] [Accepted: 03/13/2023] [Indexed: 03/17/2023] Open
Abstract
Particulate matter (PM) with a diameter of 0.3 µm is inhalable and brings great threats to human health. Traditional meltblown nonwovens used for air filtration need to be treated by high voltage corona charging, which has the problem of electrostatic dissipation and thus reduces the filtration efficiency. In this work, a kind of composite air-filter with high efficiency and low resistance was fabricated by alternating lamination of ultrathin electronspun nano-layer and melt-blown layer without corona charging treatment. The effects of fiber diameter, pore size, porosity, layer number, and weight on filtration performance were investigated. Meanwhile, the surface hydrophobicity, loading capacity, and storage stability of the composite filter were studied. The results indicate that the filters (18.5 gsm) laminated by 10 layers fiber-webs present excellent filtration efficiency (97.94%), low pressure drop (53.2 Pa), high quality factor (QF 0.073 Pa−1), and high dust holding capacity (9.72 g/m2) for NaCl aerosol particles. Increasing the layers and reducing individual layer weight can significantly improve filtration efficiency and reduce pressure drop of the filter. The filtration efficiency decayed slightly from 97.94% to 96.48% after 80 days storage. The alternate arrangement of ultra-thin nano and melt-blown layers constructed a layer-by-layer interception and collaborative filtering effect in the composite filter, realizing the high filtration efficiency and low resistance without high voltage corona charging. These results provided new insights for the application of nonwoven fabrics in air filtration.
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4
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Continuous air purification by aqueous interface filtration and absorption. Nature 2022; 610:74-80. [PMID: 36163287 DOI: 10.1038/s41586-022-05124-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 07/19/2022] [Indexed: 11/08/2022]
Abstract
The adverse impact of particulate air pollution on human health1,2 has prompted the development of purification systems that filter particulates out of air3-5. To maintain performance, the filter units must inevitably be replaced at some point, which requires maintenance, involves costs and generates solid waste6,7. Here we show that an ion-doped conjugated polymer-coated matrix infiltrated with a selected functional liquid enables efficient, continuous and maintenance-free air purification. As the air to be purified moves through the system in the form of bubbles, the functional fluid provides interfaces for filtration and for removal of particulate matter and pollutant molecules from air. Theoretical modelling and experimental results demonstrate that the system exhibits high efficiency and robustness: its one-time air purification efficiency can reach 99.6%, and its dust-holding capacity can reach 950 g m-2. The system is durable and resistant to fouling and corrosion, and the liquid acting as filter can be reused and adjusted to also enable removal of bacteria or odours. We anticipate that our purification approach will be useful for the development of specialist air purifiers that might prove useful in a settings such as hospitals, factories and mines.
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Jeong SB, Lee DU, Lee BJ, Heo KJ, Kim DW, Hwang GB, MacRobert AJ, Shin JH, Ko HS, Park SK, Oh YS, Kim SJ, Lee DY, Lee SB, Park I, Kim SB, Han B, Jung JH, Choi DY. Photobiocidal-triboelectric nanolayer coating of photosensitizer/silica-alumina for reusable and visible-light-driven antibacterial/antiviral air filters. CHEMICAL ENGINEERING JOURNAL (LAUSANNE, SWITZERLAND : 1996) 2022; 440:135830. [PMID: 35313452 PMCID: PMC8926436 DOI: 10.1016/j.cej.2022.135830] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 02/25/2022] [Accepted: 03/13/2022] [Indexed: 06/14/2023]
Abstract
Outbreaks of airborne pathogens pose a major threat to public health. Here we present a single-step nanocoating process to endow commercial face mask filters with photobiocidal activity, triboelectric filtration capability, and washability. These functions were successfully achieved with a composite nanolayer of silica-alumina (Si-Al) sol-gel, crystal violet (CV) photosensitizer, and hydrophobic electronegative molecules of 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane (PFOTES). The transparent Si-Al matrix strongly immobilized the photosensitizer molecules while dispersing them spatially, thus suppressing self-quenching. During nanolayer formation, PFOTES was anisotropically rearranged on the Si-Al matrix, promoting moisture resistance and triboelectric charging of the Si-Al/PFOTES-CV (SAPC)-coated filter. The SAPC nanolayer stabilized the photoexcited state of the photosensitizer and promoted redox reaction. Compared to pure-photosensitizer-coated filters, the SAPC filter showed substantially higher photobiocidal efficiency (∼99.99 % for bacteria and a virus) and photodurability (∼83 % reduction in bactericidal efficiency for the pure-photosensitizer filter but ∼0.34 % for the SAPC filter after 72 h of light irradiation). Moreover, after five washes with detergent, the SAPC filter maintained its photobiocidal and filtration performance, proving its reusability potential. Therefore, this SAPC nanolayer coating provides a practical strategy for manufacturing an antimicrobial and reusable mask filter for use during the ongoing COVID-19 pandemic.
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Affiliation(s)
- Sang Bin Jeong
- Department of Mechanical Engineering, Sejong University, Seoul 05006, Republic of Korea
- Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Dong Uk Lee
- Department of Industrial Chemistry, Pukyong National University, Busan 48513, Republic of Korea
- Biomedical Manufacturing Technology Center, Korea Institute of Industrial Technology, Yeongcheon 38822, Republic of Korea
| | - Byeong Jin Lee
- Biomedical Manufacturing Technology Center, Korea Institute of Industrial Technology, Yeongcheon 38822, Republic of Korea
- School of Mechanical Engineering, Andong National University, Andong 36729, Republic of Korea
| | - Ki Joon Heo
- Material Chemistry Research Centre, Department of Chemistry, University College London, London WC1H 0AJ, United Kingdom
| | - Dong Won Kim
- Research Institute for Green Energy Convergence Technology, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Gi Byoung Hwang
- Material Chemistry Research Centre, Department of Chemistry, University College London, London WC1H 0AJ, United Kingdom
| | - Alexander J MacRobert
- UCL Division of Surgery and Interventional Science, Royal Free Campus, London NW3 2PF, United Kingdom
| | - Jae Hak Shin
- Department of Mechanical Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Hyun Sik Ko
- Department of Mechanical Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Se Kye Park
- Biomedical Manufacturing Technology Center, Korea Institute of Industrial Technology, Yeongcheon 38822, Republic of Korea
- Department of Polymer Science and Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Yong Suk Oh
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - See Jo Kim
- School of Mechanical Engineering, Andong National University, Andong 36729, Republic of Korea
| | - Dong Yun Lee
- Department of Polymer Science and Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Seung-Bok Lee
- Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Inyong Park
- Department of Environmental Machinery, Korea Institute of Machinery and Materials, Daejeon 34103, Republic of Korea
| | - Sang Bok Kim
- Department of Environmental Machinery, Korea Institute of Machinery and Materials, Daejeon 34103, Republic of Korea
| | - Bangwoo Han
- Department of Environmental Machinery, Korea Institute of Machinery and Materials, Daejeon 34103, Republic of Korea
| | - Jae Hee Jung
- Department of Mechanical Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Dong Yun Choi
- Biomedical Manufacturing Technology Center, Korea Institute of Industrial Technology, Yeongcheon 38822, Republic of Korea
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6
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Guo Y, Ali W, Schneider A, Salma A, Mayer‐Gall T, Gutmann JS, Fernandez Lahore HM. Megaporous monolithic adsorbents for bioproduct recovery as prepared on the basis of nonwoven fabrics. Electrophoresis 2022; 43:1387-1398. [DOI: 10.1002/elps.202100220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 03/04/2022] [Accepted: 04/03/2022] [Indexed: 11/05/2022]
Affiliation(s)
- Yijia Guo
- Life Sciences & Chemistry Jacobs University Bremen gGmbH Bremen Germany
| | - Wael Ali
- Deutschen Textilforschungszentrum Nord‐West gGmbH Krefeld Germany
- Department of Physical Chemistry and Center for Nanointegration (CENIDE) University of Duisburg‐Essen Essen Germany
| | - Anna Schneider
- Life Sciences & Chemistry Jacobs University Bremen gGmbH Bremen Germany
| | - Alaa Salma
- Deutschen Textilforschungszentrum Nord‐West gGmbH Krefeld Germany
| | - Thomas Mayer‐Gall
- Deutschen Textilforschungszentrum Nord‐West gGmbH Krefeld Germany
- Department of Physical Chemistry and Center for Nanointegration (CENIDE) University of Duisburg‐Essen Essen Germany
| | - Jochen S. Gutmann
- Deutschen Textilforschungszentrum Nord‐West gGmbH Krefeld Germany
- Department of Physical Chemistry and Center for Nanointegration (CENIDE) University of Duisburg‐Essen Essen Germany
| | - Hector Marcelo Fernandez Lahore
- Life Sciences & Chemistry Jacobs University Bremen gGmbH Bremen Germany
- Unit Biotechnologies Department of Environmental Research and Innovation Luxembourg Institute of Science and Technology Esch‐sur‐Alzette Luxembourg
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7
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Liu M, Ma C, Zhou D, Chen S, Zou L, Wang H, Wu J. Hydrophobic, breathable cellulose nonwoven fabrics for disposable hygiene applications. Carbohydr Polym 2022; 288:119367. [DOI: 10.1016/j.carbpol.2022.119367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 02/24/2022] [Accepted: 03/14/2022] [Indexed: 11/17/2022]
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8
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Deng C, Seidi F, Yong Q, Jin X, Li C, Zhang X, Han J, Liu Y, Huang Y, Wang Y, Yuan Z, Xiao H. Antiviral/antibacterial biodegradable cellulose nonwovens as environmentally friendly and bioprotective materials with potential to minimize microplastic pollution. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127391. [PMID: 34879581 PMCID: PMC8482584 DOI: 10.1016/j.jhazmat.2021.127391] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/20/2021] [Accepted: 09/28/2021] [Indexed: 05/23/2023]
Abstract
Personal protective equipment (PPE) such as face masks is vital in battling the COVID-19 crisis, but the dominant polypropylene-based PPE are lack of antiviral/antibacterial activities and environmental friendliness, and have hazardous impact on the soil and aquatic ecosystems. The work presented herein focused on developing biodegradable, antiviral, and antibacterial cellulose nonwovens (AVAB-CNWs) as a multi-functional bioprotective layer for better protection against coronavirus SARS-CoV-2 and addressing environmental concerns raised by the piling of COVID-19 related wastes. Both guanidine-based polymer and neomycin sulfate (NEO) were reactive-modified and covalently grafted onto the surface of cellulose nonwovens, thereby conferring outstanding antiviral and antibacterial activities to the nonwovens without deteriorating the microstructure and biodegradability. Through adjusting the grafting amount of active components and selecting appropriate reagents for pretreatment, the antimicrobial activity and hydrophobicity for self-cleaning of the nonwovens can be tuned. More importantly, we demonstrated for the first time that such multi-functional nonwovens are capable of inactivating SARS-CoV-2 instantly, leading to high virucidal activity (> 99.35%), which is unachievable by conventional masks used nowadays. Meanwhile, the robust breathability and biodegradability of AVAB-CNWs were well maintained. The applications of the as-prepared nonwovens as high-performance textile can be readily extended to other areas in the fight against COVID-19.
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Affiliation(s)
- Chao Deng
- International Innovation Center for Forest Chemicals and Materials and Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
| | - Farzad Seidi
- International Innovation Center for Forest Chemicals and Materials and Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China.
| | - Qiang Yong
- International Innovation Center for Forest Chemicals and Materials and Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China.
| | - Xiangyu Jin
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China
| | - Chengcheng Li
- International Innovation Center for Forest Chemicals and Materials and Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
| | - Xing Zhang
- International Innovation Center for Forest Chemicals and Materials and Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
| | - Jingquan Han
- International Innovation Center for Forest Chemicals and Materials and Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
| | - Yuqian Liu
- International Innovation Center for Forest Chemicals and Materials and Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
| | - Yang Huang
- International Innovation Center for Forest Chemicals and Materials and Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
| | - Yuyan Wang
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Department of Medical Microbiology and Parasitology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Zhenghong Yuan
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Department of Medical Microbiology and Parasitology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Huining Xiao
- Department of Chemical Engineering, University of New Brunswick, Fredericton, NB, Canada E3B 5A3.
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9
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Zhang X, Wang Y, Liu W, Jin X. Needle-punched electret air filters (NEAFs) with high filtration efficiency, low filtration resistance, and superior dust holding capacity. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120146] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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10
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Xu Y, Zhang X, Teng D, Zhao T, Li Y, Zeng Y. Multi-layered micro/nanofibrous nonwovens for functional face mask filter. NANO RESEARCH 2022; 15:7549-7558. [PMID: 35578617 PMCID: PMC9094123 DOI: 10.1007/s12274-022-4350-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 03/08/2022] [Accepted: 03/22/2022] [Indexed: 05/03/2023]
Abstract
UNLABELLED The worldwide COVID-19 pandemic has led to an attention on the usage of personal protective face masks. However, the longevity and safety of the commercial face masks are limited due to the charge dissipation of the electret meltblown nonwovens, which are dominate in the face mask filters. Herein, we design a type of multi-layer structured nonwovens using meltblowing and electrospinning technologies. The complex nonwovens involving meltblown and electrospun fibers are designed to possess multilevel fiber diameters and pore sizes. The micro/nanofibers with porous and wrinkled surface morphologies can well capture particulate matters (PMs), and the multilevel pore sizes contribute to low air resistance under high filtration efficiency. Airflow field simulation was carried out to understand the pressure distribution within the nonwovens in the filtration process. Meanwhile, by adding Ag nanoparticles (AgNPs) as additives, the nonwovens exhibit excellent antibacterial performance. The resultant nonwovens exhibit filtration efficiency of 99.1% for PM0.3 and low pressure drop of 105 Pa under the 10.67 cm/s inlet air velocity, and antibacterial rate of > 99.99% for Escherichia coli. These performances and functions make the designed complex nonwovens a promising filter core for face masks. ELECTRONIC SUPPLEMENTARY MATERIAL Supplementary material (Fig. S1. The filtration efficiencies of a brand of surgical mask changes with the storage time under the condition of 100% humidity. Fig. S2. The FE-SEM images of the fibers after blocking PMs. Fig. S3. Illustration of 3D structure models of the nonwovens. Fig. S4. Diameter distribution of AgNPs. Table S1. The structure parameters and filtration performances of the PP-M fibers with and without pores and wrinkles. Table S2. Filtration performance of PP-M/PLA-M/PLA-N nonwovens and commercial face masks. Table S3. The structural parameters for the nonwovens. Table S4. The filtration efficiencies and pressure drops of the PP, PE spunbonded nonwovens, and PP-M/PLA-M/PLA-N@AgNPs nonwovens) is available in the online version of this article at 10.1007/s12274-022-4350-2.
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Affiliation(s)
- Yuanqiang Xu
- College of Textiles, Donghua University, Shanghai, 201620 China
| | - Xiaomin Zhang
- College of Textiles, Donghua University, Shanghai, 201620 China
| | - Defang Teng
- College of Textiles, Donghua University, Shanghai, 201620 China
| | - Tienan Zhao
- College of Textiles, Donghua University, Shanghai, 201620 China
| | - Ying Li
- College of Textiles, Donghua University, Shanghai, 201620 China
| | - Yongchun Zeng
- College of Textiles, Donghua University, Shanghai, 201620 China
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11
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Luo Y, Shen Z, Ma Z, Chen H, Wang X, Luo M, Wang R, Huang J. A Cleanable Self-Assembled Nano-SiO 2/(PTFE/PEI) n/PPS Composite Filter Medium for High-Efficiency Fine Particulate Filtration. MATERIALS (BASEL, SWITZERLAND) 2021; 14:7853. [PMID: 34947457 PMCID: PMC8706235 DOI: 10.3390/ma14247853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 12/13/2021] [Accepted: 12/15/2021] [Indexed: 11/16/2022]
Abstract
A silicon dioxide/polytetrafluoroethylene/polyethyleneimine/polyphenylene sulfide (SiO2/PTFE/PEI/PPS) composite filter medium with three-dimensional network structures was fabricated by using PPS nonwoven as the substrate which was widely employed as a cleanable filter medium. The PTFE/PEI bilayers were firstly coated on the surfaces of the PPS fibers through the layer-by-layer self-assembly technique ten times, followed by the deposition of SiO2 nanoparticles, yielding the SiO2/(PTFE/PEI)10/PPS composite material. The contents of the PTFE component were easily controlled by adjusting the number of self-assembled PTFE/PEI bilayers. As compared with the pure PPS nonwoven, the obtained SiO2/(PTFE/PEI)10/PPS composite material exhibits better mechanical properties and enhanced wear, oxidation and heat resistance. When employed as a filter material, the SiO2/(PTFE/PEI)10/PPS composite filter medium exhibited excellent filtration performance for fine particulate. The PM2.5 (particulate matter less than 2.5 μm) filtration efficiency reached up to 99.55%. The superior filtration efficiency possessed by the SiO2/(PTFE/PEI)10/PPS composite filter medium was due to the uniformly modified PTFE layers, which played a dual role in fine particulate filtration. On the one hand, the PTFE layers not only increase the specific surface area and pore volume of the composite filter material but also narrow the spaces between the fibers, which were conducive to forming the dust cake quickly, resulting in intercepting the fine particles more efficiently than the pure PPS filter medium. On the other hand, the PTFE layers have low surface energy, which is in favor of the detachment of dust cake during pulse-jet cleaning, showing superior reusability. Thanks to the three-dimensional network structures of the SiO2/(PTFE/PEI)10/PPS composite filter medium, the pressure drop during filtration was low.
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Affiliation(s)
- Yan Luo
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China;
- Shaoxing Testing Institute of Quality and Technical Supervision, Market Supervision Administration of Shaoxing Municipahty, Shaoxing 312366, China; (Z.M.); (X.W.); (M.L.)
| | - Zhongyun Shen
- Shaoxing Testing Institute of Quality and Technical Supervision, Market Supervision Administration of Shaoxing Municipahty, Shaoxing 312366, China; (Z.M.); (X.W.); (M.L.)
| | - Zhihao Ma
- Shaoxing Testing Institute of Quality and Technical Supervision, Market Supervision Administration of Shaoxing Municipahty, Shaoxing 312366, China; (Z.M.); (X.W.); (M.L.)
| | - Hongfeng Chen
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China;
- Shaoxing Testing Institute of Quality and Technical Supervision, Market Supervision Administration of Shaoxing Municipahty, Shaoxing 312366, China; (Z.M.); (X.W.); (M.L.)
| | - Xiaodong Wang
- Shaoxing Testing Institute of Quality and Technical Supervision, Market Supervision Administration of Shaoxing Municipahty, Shaoxing 312366, China; (Z.M.); (X.W.); (M.L.)
| | - Minger Luo
- Shaoxing Testing Institute of Quality and Technical Supervision, Market Supervision Administration of Shaoxing Municipahty, Shaoxing 312366, China; (Z.M.); (X.W.); (M.L.)
| | - Ran Wang
- CAM-China Productivity Center for Machinery, China Academy of Machinery Science and Technology, Beijing 100044, China;
| | - Jianguo Huang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China;
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12
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Kang HK, Oh HJ, Kim JY, Kim HY, Choi YO. Effect of Process Control Parameters on the Filtration Performance of PAN-CTAB Nanofiber/Nanonet Web Combined with Meltblown Nonwoven. Polymers (Basel) 2021; 13:3591. [PMID: 34685350 PMCID: PMC8537697 DOI: 10.3390/polym13203591] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/08/2021] [Accepted: 10/14/2021] [Indexed: 12/03/2022] Open
Abstract
Nanofibers have potential applications as filters for particles with diameters <10 μm owing to their large specific surface area, macropores, and controllable geometry or diameter. The filtration efficiency can be increased by creating nanonets (<50 nm) whose diameter is smaller than that of nanofibers. This study investigates the effect of process conditions on the generation of nanonet structures from a polyacrylonitrile (PAN) solution containing cation surfactants; in addition, the filtration performance is analyzed. The applied electrospinning voltage and the electrostatic treatment of meltblown polypropylene (used as a substrate) are the most influential process parameters of nanonet formation. Electrospun polyacrylonitrile-cetylmethylammonium bromide (PAN-CTAB) showed a nanofiber/nanonet structure and improved thermal and mechanical properties compared with those of the electrospun PAN. The pore size distribution and filter efficiency of the PAN nanofiber web and PAN-CTAB nanofiber/nanonet web with meltblown were measured. The resulting PAN-CTAB nanofiber/nanonet air filter showed a high filtration efficiency of 99% and a low pressure drop of 7.7 mmH2O at an air flow rate of 80 L/min. The process control methods for the nanonet structures studied herein provide a new approach for developing functional materials for air-filtration applications.
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Affiliation(s)
- Hyo Kyoung Kang
- Advanced Textile R&D Department, Korea Institute of Industrial Technology, Ansan 15588, Korea; (H.K.K.); (H.J.O.); (J.Y.K.)
- Department of Organic Materials and Fiber Engineering, Jeonbuk National University, Jeonju 54896, Korea
| | - Hyun Ju Oh
- Advanced Textile R&D Department, Korea Institute of Industrial Technology, Ansan 15588, Korea; (H.K.K.); (H.J.O.); (J.Y.K.)
| | - Jung Yeon Kim
- Advanced Textile R&D Department, Korea Institute of Industrial Technology, Ansan 15588, Korea; (H.K.K.); (H.J.O.); (J.Y.K.)
| | - Hak Yong Kim
- Department of Organic Materials and Fiber Engineering, Jeonbuk National University, Jeonju 54896, Korea
- Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju 54896, Korea
| | - Yeong Og Choi
- Advanced Textile R&D Department, Korea Institute of Industrial Technology, Ansan 15588, Korea; (H.K.K.); (H.J.O.); (J.Y.K.)
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13
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Zhang X, Liu J, Zhang H, Hou J, Wang Y, Deng C, Huang C, Jin X. Multi-Layered, Corona Charged Melt Blown Nonwovens as High Performance PM 0.3 Air Filters. Polymers (Basel) 2021; 13:485. [PMID: 33557037 PMCID: PMC7913826 DOI: 10.3390/polym13040485] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 01/28/2021] [Accepted: 01/30/2021] [Indexed: 11/28/2022] Open
Abstract
Particulate matter (PM) and airborne viruses bring adverse influence on human health. As the most feasible way to prevent inhalation of these pollutants, face masks with excellent filtration efficiency and low press drop are in urgent demand. In this study, we report a novel methodology for producing high performance air filter by combining melt blown technique with corona charging treatment. Changing the crystal structure of polypropylene by adding magnesium stearate can avoid charge escape and ensure the stability of filtration performances. Particularly, the influence of fiber diameter, pore size, porosity, and charge storage on the filtration performances of the filter are thoroughly investigated. The filtration performances of the materials, including the loading test performance are also studied. The melt blown materials formed by four layers presented a significant filtration efficiency of 97.96%, a low pressure drop of 84.28 Pa, and a high quality factor (QF) of 0.046 Pa-1 for paraffin oil aerosol particles. Meanwhile, a robust filtration efficiency of 99.03%, a low pressure drop of 82.32 Pa, and an excellent QF of 0.056 Pa-1 for NaCl aerosol particles could be easily achieved. The multi-layered melt blown filtration material developed here would be potentially applied in the field of protective masks.
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Affiliation(s)
- Xing Zhang
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China; (X.Z.); (J.L.); (J.H.); (Y.W.); (C.H.)
| | - Jinxin Liu
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China; (X.Z.); (J.L.); (J.H.); (Y.W.); (C.H.)
| | - Haifeng Zhang
- College of Textile and Clothing, Nantong University, Nantong 226019, China;
| | - Jue Hou
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China; (X.Z.); (J.L.); (J.H.); (Y.W.); (C.H.)
| | - Yuxiao Wang
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China; (X.Z.); (J.L.); (J.H.); (Y.W.); (C.H.)
| | - Chao Deng
- Joint International Research Lab of Lignocellulosic Functional Materials and Provincial Key Lab of Pulp and Paper Sci & Tech, Nanjing Forestry University, Nanjing 210037, China;
| | - Chen Huang
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China; (X.Z.); (J.L.); (J.H.); (Y.W.); (C.H.)
| | - Xiangyu Jin
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China; (X.Z.); (J.L.); (J.H.); (Y.W.); (C.H.)
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14
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Lab-scale design of two layers wood cellulose filter media to maximize life span for intake air filtration. Sci Rep 2021; 11:3153. [PMID: 33542441 PMCID: PMC7862255 DOI: 10.1038/s41598-021-82855-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 01/21/2021] [Indexed: 11/25/2022] Open
Abstract
The requirement of continuous and stringent growth on filtration performance, including longer life span, higher overall efficiency, lower initial pressure drop and more cost effective, has still drove filter media manufactures to research and develop. One of the possible way to achieve these challenges, was to utilize a dual-channel head-box with two sets of pulp conveying system, which can produce filter media with bulky and gradient properties. In this study, three kinds of commercial cellulose were chosen to make two layers filtration media, analyzed the effect of fiber blend on physical properties and filtration performance. By fine-tune the slurry ratio of top layer, we made one single layer and two layers composition filter media, the thickness and air permeability of composition media were higher than single layer media. According to ISO 5011, filtration performance test has been done to compare single layer media with composition media, this composition gradient profiles that provided the life span 37.0% improvement to the terminal pressure drop during dust injecting, and the dust hold capacity improved 34.7%, the main contributor of dust hold capacity was decided by top layer, however, the overall efficiency was depended on wire side layer.
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15
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Zhang H, Liu N, Zeng Q, Liu J, Zhang X, Ge M, Zhang W, Li S, Fu Y, Zhang Y. Design of Polypropylene Electret Melt Blown Nonwovens with Superior Filtration Efficiency Stability through Thermally Stimulated Charging. Polymers (Basel) 2020; 12:E2341. [PMID: 33066175 PMCID: PMC7602006 DOI: 10.3390/polym12102341] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 10/09/2020] [Accepted: 10/12/2020] [Indexed: 11/29/2022] Open
Abstract
Electret filters are widely used in particulate matter filtration due to their filtration efficiency that can be greatly improved by electrostatic forces without sacrificing the air resistance. However, the attenuation of the filtration efficiency remains a challenge. In this study, we report a novel strategy for producing an electret melt blown filter with superior filtration efficiency stability through a thermally stimulated charging method. The proposed approach optimizes the crystal structure and therefore results in the increased production probability of the charge traps. In addition, the re-trapping phenomenon caused by the thermal stimulation during the charging process can greatly increase the proportion of deep charge to shallow charge and improve the charge stability. A superior electret melt blown filtration material with a high filtration efficiency of 99.65%, low pressure drop of 120 Pa, and satisfactory filtration efficiency stability was produced after three cyclic charging times. The excellent filtration performance indicated that the developed material is a good air filtration candidate component for personal protection applications.
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Affiliation(s)
- Haifeng Zhang
- College of Textile and Clothing, Nantong University, Nantong 226019, China; (H.Z.); (N.L.); (Q.Z.); (M.G.); (S.L.); (Y.F.); (Y.Z.)
- National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, College of Textile and Clothing, Nantong University, Nantong 226019, China
| | - Nuo Liu
- College of Textile and Clothing, Nantong University, Nantong 226019, China; (H.Z.); (N.L.); (Q.Z.); (M.G.); (S.L.); (Y.F.); (Y.Z.)
- National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, College of Textile and Clothing, Nantong University, Nantong 226019, China
| | - Qianru Zeng
- College of Textile and Clothing, Nantong University, Nantong 226019, China; (H.Z.); (N.L.); (Q.Z.); (M.G.); (S.L.); (Y.F.); (Y.Z.)
- National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, College of Textile and Clothing, Nantong University, Nantong 226019, China
| | - Jinxin Liu
- Engineering Research Center of Technical Textiles, Ministry of Education, Donghua University, Shanghai 201620, China; (J.L.); (X.Z.)
| | - Xing Zhang
- Engineering Research Center of Technical Textiles, Ministry of Education, Donghua University, Shanghai 201620, China; (J.L.); (X.Z.)
| | - Mingzheng Ge
- College of Textile and Clothing, Nantong University, Nantong 226019, China; (H.Z.); (N.L.); (Q.Z.); (M.G.); (S.L.); (Y.F.); (Y.Z.)
- National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, College of Textile and Clothing, Nantong University, Nantong 226019, China
| | - Wei Zhang
- College of Textile and Clothing, Nantong University, Nantong 226019, China; (H.Z.); (N.L.); (Q.Z.); (M.G.); (S.L.); (Y.F.); (Y.Z.)
- National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, College of Textile and Clothing, Nantong University, Nantong 226019, China
| | - Suying Li
- College of Textile and Clothing, Nantong University, Nantong 226019, China; (H.Z.); (N.L.); (Q.Z.); (M.G.); (S.L.); (Y.F.); (Y.Z.)
- National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, College of Textile and Clothing, Nantong University, Nantong 226019, China
| | - Yijun Fu
- College of Textile and Clothing, Nantong University, Nantong 226019, China; (H.Z.); (N.L.); (Q.Z.); (M.G.); (S.L.); (Y.F.); (Y.Z.)
- National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, College of Textile and Clothing, Nantong University, Nantong 226019, China
| | - Yu Zhang
- College of Textile and Clothing, Nantong University, Nantong 226019, China; (H.Z.); (N.L.); (Q.Z.); (M.G.); (S.L.); (Y.F.); (Y.Z.)
- National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, College of Textile and Clothing, Nantong University, Nantong 226019, China
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16
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Wang Y, Xu Y, Wang D, Zhang Y, Zhang X, Liu J, Zhao Y, Huang C, Jin X. Polytetrafluoroethylene/Polyphenylene Sulfide Needle-Punched Triboelectric Air Filter for Efficient Particulate Matter Removal. ACS APPLIED MATERIALS & INTERFACES 2019; 11:48437-48449. [PMID: 31790597 DOI: 10.1021/acsami.9b18341] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The demand for air filtration materials in recent years has been substantially increasing on a worldwide scale because people are paying extensive attention to particulate matter (PM) pollution. In this work, we report a type of needle-punched triboelectric air filter (N-TAF) consisting of polytetrafluoroethylene (PTFE) fibers modified by silica nanoparticles and polyphenylene sulfide (PPS) fibers. Compared to conventional electrostatic precipitators, the N-TAF can be charged online by a unique nonwoven processing technology without additional energy consumption and toxic ozone emission. Owing to the triboelectrification effect, a large number of charges were generated during the process of carding and needle-punching, resulting in an increased filtration performance. Benefiting from the addition of silica nanoparticles, the PTFE fibers are endowed with many pores and grooves and substantial surface roughness, which contributes to the enhancement of triboelectrification. As a result, the N-TAF with 2 wt % silica nanoparticles (N-TAF-2) exhibited a high removal efficiency of 89.4% for PM, which is 45% higher than unmodified N-TAF (61.8%), and a low pressure drop of 18.6 Pa. Meanwhile, the decay of the removal efficiency for N-TAF-2 remained at a low level (6.4%) for 60 days. More importantly, N-TAF-2 could realize a high efficiency of 99.7% and a low pressure drop of 55.4 Pa at a high surface density. In addition, the washed N-TAF has an excellent charge regeneration performance via air blowing or manual rubbing, thus recovering the removal efficiency easily and rapidly. Ultimately, the powerful dust holding capacity (227 g m-2) for N-TAF-2 indicates that the filter has a long service life, which makes it a promising air purification material. The filter reported in this work has the potential to be practically applied to air purification fields because it has excellent filtration performance and is easy to be produced on a large industrial scale.
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Affiliation(s)
- Yuxiao Wang
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China
| | - Yukang Xu
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China
| | - Dan Wang
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China
| | - Yinjiang Zhang
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China
| | - Xing Zhang
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China
| | - Jinxin Liu
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China
| | - Yi Zhao
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China
| | - Chen Huang
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China
| | - Xiangyu Jin
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China
- Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles , Donghua University , Shanghai 201620 , China
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