COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Pengcheng Song,Shuaijie Li,Peng Chen,Xiaoming Li,Zhihui Zhao,Weichao Chen
With the rapid industrial development, massive untreated polluting gases are discharged, causing irreversible environmental damage. Membrane filtration technology efficiently removes airborne pollutants, and preparing high-performance filter materials via structural adjustment offers a simple solution. In this work, the Polyamide 66 (PA66)/ Formic acid (FA) spinning solution, characterized by high viscosity, electrical conductivity, and relatively low surface tension, facilitates the fabrication of nanofibers with a diameter of merely 166 nm, rendering it an efficient intermediate filter layer. Conversely, the PA66/ 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) spinning solution yields a thick filament layer with a diameter of 638 nm, which imparts mechanical properties to the sandwich-structured nanofiber membranes on both lateral sides. The resulting sandwich structure membrane exhibits exceptional filtration performance, achieving a PM 0.3 capture efficiency of 99.5 % with a low-pressure drop of 63 Pa. After multiple air-filtration cycle tests, the membrane maintains stable filtration performance, demonstrating great potential in air filtration applications. Additionally, the oil-water separation effect can reach 99.79 % with water flux of 6534 L·m⁻²·h⁻¹ , which could be maintained after multiple cycle tests. This study presents a simple and effective approach to control the microstructure of nanofiber membrane, achieving eminent filtration performance and oil-water separation.
研究领域:
材料科学
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环境工程
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纳米技术
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Xi Yu,Chuanming Li,Huafeng Tian,Li Yuan,Aimin Xiang,Jinlong Li,Chaoyang Wang,A. Varada Rajulu
Though zein is gaining more and more attention because of its multifunctionality and biodegradability, the high sensitivity to humidity limits its further applications. In the present study, the multifunctional zein nanofibers were prepared by electrospinning with the assistance of polyvinyl alcohol, followed by cross-linking with glutaraldehyde. In this way, the moisture resistance of the nanofibers was significantly improved while the air filtration performance was well retained. The optimized nanofibers exhibited over 97% filtration efficiency of PM 0.3 (particulate matter size less than 0.3 μm), and the filtration efficiency of other sizes of pollutant particles was more than 98%. In addition, the relatively weak mechanical properties of zein have also been improved. These results suggest that cross-linked zein-based nanofibers are promising for air filtration applications.
研究领域:
材料科学
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环境工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Xuzheng Ji,Yuchen Yang,Yukui Gou,Yue Yang,Wei Li,Jianying Huang,Weilong Cai,Yuekun Lai
Particulate matter (PM) pollution has posed a severe threat to the environment and human health. Especially for submicron-level fine particulate PM 0.3 , it is still difficult to achieve high-efficiency filtration. Herein, we loaded TiO 2 /g-C 3 N 4 (TCN) heterojunction photocatalyst on polystyrene/polyacrylonitrile (PS/PAN) multiscale nanofiber membranes by a simple one-step blending electrospinning technique. Due to the strong long-range electrostatic force of the built-in electric field, the composite membrane has a remarkably enhanced filtration effect under light. Even under harsh conditions with a high PM 0.3 concentration of more than 1,800,000 m −3 and a high flow rate of 25 L/min, it still has a high filtration efficiency of greater than 98.5%, an increase of about 20% compared with dark conditions, and the pressure drop is only low to 94 Pa. More importantly, the electrostatic field can be regenerated with light, and this preparation strategy can be effectively extended to other photocatalyst heterojunctions.
研究领域:
环境科学
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材料科学
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纳米技术
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空气污染控制
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Meng Chen,Xihui Cheng,Jiwei Li,Na Wang
A multi-use fibrous filter medium composed of an electrospun polyimide (PI) nanofiber layer and a functional zeolitic imidazolate framework-8 (ZIF8) nanofilm layer was successfully fabricated to cope with the complex environmental pollution issues. The nanofilm layer consists of the anti-microbial ZIF8 converted from non-toxic zinc oxide (ZnO) nanocoating on PI fibers. One-step magnetron sputtering is utilized to deposit the ZnO nanocoating for the sake of desired functionality conformally onto the PI nanofibrous membrane without sacrificing its bulk structure and mechanical performance. The as-prepared PI/ZIF8 nanofibrous filter medium showed conspicuous biocidal efficacy and excellent interception ratio against gram-negative Escherichia coli (>99.9%) and gram-positive Staphylococcus aureus (>99.9%) within 20 min contact. Besides, compared with commercial media, the bilayer PI/ZIF8 fibrous medium showed exceptional thermal-wet comfortability due to the high porosity that could realize effective heat and humidity conduction. Moreover, the PI/ZIF8 30 NFM still present a high filtration efficiency of 99.6% towards PM 0.3 even after treated at 300 °C for 1 h. Furthermore, the PI/ZIF8 30 NFM with a fiber basis weight of 1.8 g/m 2 was endowed with a permeate flux of 17,279.2 L/m 2 /h and a high oil/water separation efficiency of > 99.6% because of the hydrophobicity and superoleophilicity. We envision that the antimicrobial, thermal-wet comfort, multi-use fibrous membrane will serve as a core-medium of environmentally-friendly platform for bioprotective equipment against future pathogen threats or oily wastewater treatment .
研究领域:
环境科学
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材料科学
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纳米技术
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生物技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Qibin Wang,Zungui Shao,Jian Sui,Ruimin Shen,Ruixin Chen,Zeqian Gui,Yude Qi,Wenzhengyi Song,Guoxin Li,Yifang Liu,Gaofeng Zheng
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 PM 0.3 , 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.
研究领域:
材料科学
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环境科学
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化学工程
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Jinmiao Chen,Shaohua Zhang,Yuejie Dou,Guangting Han,Na Wang,Zhenghai Qu,Chunguo Liu,Jiwei Li
The high humidity environment created by human breath can easily lead to charge loss in the mask's filter and weaken the mask's filtration effect on aerosols containing bacteria and viruses. Therefore, in this study, a breath moisture-induced electroactive nanofibrous membrane was prepared by incorporating Cu/Zn nanoparticles into cellulose acetate/poly (vinyl butyral) fibers. Adjacent Cu/Zn nanoparticles can form galvanic couples that can be activated by human breath to undergo redox discharge reactions, thus imparting moisture-induced electroactivity to nanofibrous membrane. Based on the moisture-induced electroactivity, nanofibrous membrane demonstrated antibacterial rates of 98.32 % against Escherichia coli ( E. coli ) and 99.06 % against Staphylococcus aureus ( S. aureus ). Moreover, moisture-induced electroactive nanofibrous membrane significantly reduced the titer of Enterovirus 71 (EV71) transmitted through the respiratory tract within 5 min. The excellent antibacterial and antiviral performance of electroactive nanofibrous membrane can be attributed to the synergistic effect of Cu/Zn’s electrical stimulation (ES) interference on the electrodynamics of bacteria and viruses, the generated reactive oxygen species (ROS), and the released metal ions. Benefiting from the increased surface potential from Cu/Zn galvanic couples, moisture-induced electroactive nanofibrous membrane exhibited a filtration efficiency of 99.61 % for PM 0.3 particles while maintaining a low-pressure drop (78 Pa). Meanwhile, electroactive nanofibrous membrane showed excellent wear comfort and non-cytotoxicity. In summary, this moisture-induced electroactive nanofibrous membrane maintains high filtration performance and exhibits excellent antibacterial and antiviral activities, shedding some light on developing novel efficient air filters.
研究领域:
材料科学
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纳米技术
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生物医学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）