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Pan Q, Sang N, Zhou T, Wu C, Si T, Huang F, Zhu Z. Array-structured microcapsule fibers for efficient fire extinguishing in confined spaces. LAB ON A CHIP 2025; 25:2193-2204. [PMID: 40231960 DOI: 10.1039/d4lc00802b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/16/2025]
Abstract
Fire incidents in confined spaces pose significant risks to human lives and property. In such scenarios, achieving structural encapsulation and design of fire extinguishing agents is crucial. However, there is still a significant knowledge gap in the rational structural design and understanding of fire extinguishing mechanisms. Herein, we have developed a fire extinguishing material with a hemispherical knotted microfiber structure by microfluidic spinning and achieved directed multiple-fire extinguishing in a confined space. Fire-extinguishing microfibers (FEMFs) are uniformly distributed with perfluorohexanone (PFH)-embedded knots, each of which acts as an independent fire-extinguishing unit. The rational design of fiber microstructure can achieve a variety of dosage ratios of extinguishing agents that activate at a fire extinguishing temperature of 120 °C. Through high-speed imaging and simulation calculations, we found that FEMFs containing only 0.2 g PFH can generate up to 207 directional jets to extinguish fires. Fire-extinguishing patches (FEPs) made from FEMFs have a uniform distribution of the extinguishing agent and exhibit excellent fire extinguishing performance in electrical junction boxes. This new fire extinguishing material is believed to have broad applications in enhancing fire safety within confined spaces.
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Affiliation(s)
- Qiaosheng Pan
- School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei, Anhui 230026, China
| | - Ning Sang
- School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei, Anhui 230026, China
- Institute of Advanced Technology, University of Science and Technology of China, Hefei, Anhui 230088, China.
| | - Tianpei Zhou
- Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Changzheng Wu
- Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Ting Si
- Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Fangsheng Huang
- Institute of Advanced Technology, University of Science and Technology of China, Hefei, Anhui 230088, China.
| | - Zhiqiang Zhu
- Institute of Advanced Technology, University of Science and Technology of China, Hefei, Anhui 230088, China.
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui 230026, China
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2
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Ahmetoglu U, Gungor M, Kilic A. Alginate/gelatin blend fibers for functional high-performance air filtration applications. Int J Biol Macromol 2025; 294:139389. [PMID: 39746426 DOI: 10.1016/j.ijbiomac.2024.139389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2024] [Revised: 12/24/2024] [Accepted: 12/29/2024] [Indexed: 01/04/2025]
Abstract
Currently, the primary composition of fibrous filter materials predominantly relies on synthetic polymers derived from petroleum. The utilization of these polymers, as well as their production process, has a negative impact on the environment. Consequently, the adoption of air filter media fabricated from natural fibers would yield significant environmental benefits. Nowadays not only particle and odour capture performance but also ensuring a high energy efficiency and flame retardant properties in air filters is of utmost importance for automotive and HVAC filters. In this study, for the production of biodegradable and flame retardant air filters with a high quality factor, free standing gelatin/sodium alginate blend fibers were successfully produced via centrifugal spinning. The water-soluble mats were stabilized by physical methods using both thermal and ionic crosslinking. The CGCA (Crosslinked-Gelatin/Calcium Alginate) mat exhibited exceptional filtration performance for PM0.3 particles, achieving a 94.2 % efficiency rating at a pressure drop of 135 Pa. Moreover, blending of biopolymers and subsequent calcination provided V0 level flame retardancy according to UL94 standard. The preliminary biodegradation studies showed that proposed nanofibrous filters were completely degraded in soil in 7 days.
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Affiliation(s)
- Ubey Ahmetoglu
- Department of Nanoscience and Nanoengineering, Istanbul Technical University, Istanbul, Turkey
| | - Melike Gungor
- Department of Textile Engineering, Istanbul Technical University, Istanbul, Turkey
| | - Ali Kilic
- Department of Textile Engineering, Istanbul Technical University, Istanbul, Turkey.
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Wang S, Fan P, Liu W, Hu B, Guo J, Wang Z, Zhu S, Zhao Y, Fan J, Li G, Xu L. Research Progress of Flexible Electronic Devices Based on Electrospun Nanofibers. ACS NANO 2024; 18:31737-31772. [PMID: 39499656 DOI: 10.1021/acsnano.4c13106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2024]
Abstract
Electrospun nanofibers have become an important component in fabricating flexible electronic devices because of their permeability, flexibility, stretchability, and conformability to three-dimensional curved surfaces. This review delves into the advancements in adaptable and flexible electronic devices using electrospun nanofibers as the substrates and explores their diverse and innovative applications. The primary development of key substrates for flexible devices is summarized. After briefly discussing the principle of electrospinning, process parameters that affect electrospinning, and two major electrospinning techniques (i.e., single-fluid electrospinning and multifluid electrospinning), the review shines a spotlight on the recent breakthroughs in multifunctional and stretchable electronic devices that are based on electrospun substrates. These advancements include flexible sensors, flexible energy harvesting and storage devices, flexible accessories for electronic devices, and flexible environmental monitoring devices. In particular, the review outlines the challenges and potential solutions of developing electrospun nanofibers for flexible electronic devices, including overcoming the incompatibility of multiple interfaces, developing 3D microstructure sensor arrays with gradient geometry for various imperceptible on-skin devices, etc. This review may provide a comprehensive understanding of the rational design of application-oriented flexible electronic devices based on electrospun nanofibers.
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Affiliation(s)
- Shige Wang
- School of Materials and Chemistry, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, P. R. China
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR 999077, P. R. China
- Advanced Biomedical Instrumentation Centre, Hong Kong Science Park, Shatin, New Territories, Hong Kong SAR 999077, P. R. China
| | - Peng Fan
- School of Materials and Chemistry, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, P. R. China
| | - Wenbo Liu
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR 999077, P. R. China
| | - Bin Hu
- School of Materials and Chemistry, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, P. R. China
| | - Jiaxuan Guo
- School of Materials and Chemistry, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, P. R. China
| | - Zizhao Wang
- School of Materials and Chemistry, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, P. R. China
| | - Shengke Zhu
- School of Materials and Chemistry, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, P. R. China
| | - Yipu Zhao
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR 999077, P. R. China
- Advanced Biomedical Instrumentation Centre, Hong Kong Science Park, Shatin, New Territories, Hong Kong SAR 999077, P. R. China
| | - Jinchen Fan
- School of Materials and Chemistry, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, P. R. China
| | - Guisheng Li
- School of Materials and Chemistry, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, P. R. China
| | - Lizhi Xu
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR 999077, P. R. China
- Advanced Biomedical Instrumentation Centre, Hong Kong Science Park, Shatin, New Territories, Hong Kong SAR 999077, P. R. China
- Materials Innovation Institute for Life Sciences and Energy (MILES), The University of Hong Kong Shenzhen Institute of Research and Innovation (HKU-SIRI), Shenzhen 518057, P. R. China
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Wang Q, Shao Z, Sui J, Shen R, Chen R, Gui Z, Qi Y, Song W, Li G, Liu Y, Zheng G. Preparation of ethyl cellulose bimodal nanofibrous membrane by green electrospinning based on molecular weight regulation for high-performance air filtration. Int J Biol Macromol 2024; 275:133411. [PMID: 38945722 DOI: 10.1016/j.ijbiomac.2024.133411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 06/10/2024] [Accepted: 06/23/2024] [Indexed: 07/02/2024]
Abstract
Preparing bio-based air filtration membrane through green electrospinning strategy is a vital approach to alleviating environmental and energy crises. However, the development of related biomaterials and method for regulating membrane structure are still lacking. In this study, ethyl cellulose (EC) bimodal nanofibrous membrane was prepared by electrospinning using ethanol and water as solvents to achieve high-performance air filtration. A new strategy for bimodal fiber molding based on molecular weight modulation was proposed. The EC polymer chains with medium molecular weights were subject to the highest degree of inhomogeneity of solvent intrusion, and there were significant differences in viscous forces "microscopically", leading to the formation of bimodal structure by inhomogeneous stretching of the jet. The well-defined bimodal structure endowed EC membrane with excellent air filtration performance. The filtration efficiency for PM0.3, pressure drop, quality factor were 99.11 %, 42.2 Pa, and 0.112 Pa-1, respectively. Compared to the commonly used zein, EC cost just 12.77 %, and its solution had a 50 % longer shelf life, making it a more desirable biomaterial. This work will facilitate the application of more biomaterials in air filtration, promote the green fabrication of high-performance air filtration membranes, and realize sustainable development.
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Affiliation(s)
- Qibin Wang
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361102, China
| | - Zungui Shao
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361102, China
| | - Jian Sui
- Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Ruimin Shen
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361102, China
| | - Ruixin Chen
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361102, China
| | - Zeqian Gui
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361102, China
| | - Yude Qi
- Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361102, China
| | - Wenzhengyi Song
- Department of Instrumental and Electrical Engineering, Xiamen University, Xiamen 361102, China
| | - Guoxin Li
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361102, China
| | - Yifang Liu
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361102, China.
| | - Gaofeng Zheng
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361102, China.
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Seo J, Im J, Kim M, Song D, Yoon S, Cho KY. Recent Progress of Advanced Functional Separators in Lithium Metal Batteries. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2312132. [PMID: 38453671 DOI: 10.1002/smll.202312132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 02/26/2024] [Indexed: 03/09/2024]
Abstract
As a representative in the post-lithium-ion batteries (LIBs) landscape, lithium metal batteries (LMBs) exhibit high-energy densities but suffer from low coulombic efficiencies and short cycling lifetimes due to dendrite formation and complex side reactions. Separator modification holds the most promise in overcoming these challenges because it utilizes the original elements of LMBs. In this review, separators designed to address critical issues in LMBs that are fatal to their destiny according to the target electrodes are focused on. On the lithium anode side, functional separators reduce dendrite propagation with a conductive lithiophilic layer and a uniform Li-ion channel or form a stable solid electrolyte interphase layer through the continuous release of active agents. The classification of functional separators solving the degradation stemming from the cathodes, which has often been overlooked, is summarized. Structural deterioration and the resulting leakage from cathode materials are suppressed by acidic impurity scavenging, transition metal ion capture, and polysulfide shuttle effect inhibition from functional separators. Furthermore, flame-retardant separators for preventing LMB safety issues and multifunctional separators are discussed. Further expansion of functional separators can be effectively utilized in other types of batteries, indicating that intensive and extensive research on functional separators is expected to continue in LIBs.
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Affiliation(s)
- Junhyeok Seo
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea
| | - Juyeon Im
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea
| | - Minjae Kim
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea
| | - Dahee Song
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea
| | - Sukeun Yoon
- Division of Advanced Materials Engineering, Kongju National University, Cheonan, Chungnam, 31080, Republic of Korea
| | - Kuk Young Cho
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea
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Zhou G, Xu Z, Zhang Y, Liu J, Jiang L, Liu R, Wang Y. Effect of different antibacterial agents doping in PET-based electrospun nanofibrous membranes on air filtration and antibacterial performance. ENVIRONMENTAL RESEARCH 2024; 243:117877. [PMID: 38070855 DOI: 10.1016/j.envres.2023.117877] [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: 10/02/2023] [Revised: 11/29/2023] [Accepted: 12/04/2023] [Indexed: 02/06/2024]
Abstract
In order to reduce the particulate matter pollution to human health in producing environments, series of polyethylene terephthalate/polyvinyl alcohol (PET/PVA) based nanofibrous membranes were fabricated and investigated the dust collection and antibacterial activity. Silver nanoparticles (AgNPs), berberine (Ber) and titanium oxide nanoparticles (TiO2NPs) were selected as antibacterial agents. These novel membranes were well-characterized using SEM, FTIR, TG, etc. techniques. Results of the dust filtration showed that PET/PVA/Ag membrane had the best filtration efficiency of 99.87% for sodium chloride (NaCl) and 99.89% for dioctyl sebacate (DEHS), held low pressure drop of 160.1 Pa for NaCl and 165.3 Pa for DEHS, and posed a high tensile strength of 4.91 MPa. The bacteriostasis studies exhibited that PET/PVA/TiO2 and PET/PVA/Ag membrane showed the highest bacteriological effect on Escherichia coli (98.7%) and Staphylococcus aureus (95.9%), respectively. Meanwhile, in vitro cytotoxicity test indicated no potential cytotoxicity existed in the cell culture process of these two antibacterial membranes. Moreover, the charge distribution in the nanofibers was increased by these antibacterial agents to improve the filtration performance. The dust filtration process synergistically promoted with the antibacterial process in the antibacterial membranes. It was expected that these membranes could be efficient filter medias with broad application prospects in the field of individual protection.
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Affiliation(s)
- Gang Zhou
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China; State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Zhuo Xu
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China; State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Yongliang Zhang
- School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Jianguo Liu
- Key Laboratory of High-Efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing, 100083, China
| | - Liwei Jiang
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China; State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Rulin Liu
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China; State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Yongmei Wang
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China; State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China.
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7
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Wang G, Xiao D, Fang Y, Ning G, Ye J. Polarity-dominated chitosan biguanide hydrochloride-based nanofibrous membrane with antibacterial activity for long-lasting air filtration. Int J Biol Macromol 2024; 254:127729. [PMID: 38287566 DOI: 10.1016/j.ijbiomac.2023.127729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 10/23/2023] [Accepted: 10/26/2023] [Indexed: 01/31/2024]
Abstract
Facemasks play a significant role as personal protective equipment during the COVID-19 pandemic, but their longevity is limited by the easy dissipation of electrostatic charge and the accumulation of bacteria. In this study, nanofibrous membranes composed of polyacrylonitrile and chitosan biguanide hydrochloride (PAN@CGH) with remarkable antibacterial characteristics were prepared through the coaxial electrospinning process. Particulate matter could be efficiently captured by the fibrous membrane, up to 98 % or more, via polarity-dominated forces derived from cyano and amino groups. As compared commercial N95 masks, the PAN@CGH was more resistant to a wider variety of disinfection protocols. Additionally, the nanofibrous membrane could kill >99.99 % of both Escherichia coli and Staphylococcus aureus. Based on these characteristics, PAN@CGH nanofibrous membrane was applied to facial mask, which possessed an excellent and long-lasting effect on the capture of airborne particles. This work may be one of the most promising strategies on designing high-performance face masks for public health protection.
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Affiliation(s)
- Guangyao Wang
- State Key Laboratory of Fine Chemicals and School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116012, PR China
| | - Dingwen Xiao
- State Key Laboratory of Fine Chemicals and School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116012, PR China
| | - Yueguang Fang
- State Key Laboratory of Fine Chemicals and School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116012, PR China
| | - Guiling Ning
- State Key Laboratory of Fine Chemicals and School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116012, PR China; Engineering Laboratory of Boric and Magnesic Functional Material Preparative and Applied Technology, 2 Linggong Road, Dalian, Liaoning 116024, PR China
| | - Junwei Ye
- State Key Laboratory of Fine Chemicals and School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116012, PR China; Engineering Laboratory of Boric and Magnesic Functional Material Preparative and Applied Technology, 2 Linggong Road, Dalian, Liaoning 116024, PR China.
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