RSC Advances
·
2018
·Vol. 8
·期 55
·31471-31477
·
IF 2.936
Yongyong Zhang,Ying Jia,Li'an Hou
Zeolitic imidazolate framework-8 (ZIF-8) was introduced on the surface of fibers of a non-woven fabric made of polyethylene terephthalate (PET). The phase structure, morphology, textural properties and chemical structure were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen (N2) adsorption analyzer and Fourier transform infrared spectroscopy (FTIR). The XRD, SEM and FTIR results indicated that ZIF-8 had been successfully coated on the PET fibers. N2 adsorption analyses suggested that addition of ZIF-8 significantly increased the specific surface and micropore volume of composites. The PM2.5 removal experiment showed the filtration efficiency of ZIF-8/PET was twice as high as that of pure PET. Meanwhile, ZIF-8/PET also displayed a low pressure drop and good recycling performance. This research provided a facile method to deposit active ZIF-8 onto polymers with low air resistance, and that ZIF-8/PET was a good candidate as an air filter for PM2.5 removal.
研究领域:
材料科学
·
环境科学
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DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2017
·
IF 2.572
Jinshan Cao,Zhiqiang Cheng,Lijuan Kang,Yingying Zhang,Xiaodong Zhao,Shengzhe Zhao,Bo Gao
In this study, a novel polyethersulfone/polyamide 66 (PES/PA66) filtration media for airborne particles was prepared via electrospinning technique. SEM, TEM, FTIR, tensile tester, contact angle analyzer, thermogravimetric analyzer (TGA) and differential scanning calorimeter (DSC) were employed to characterize the morphology, the structural properties, mechanical properties, wettability and thermal properties, which indicated that the surface of the PES/PA66 composite nanofibers was smooth and uniform. As compared to pure PES membrane, the hydrophilicity of the PES/PA66 filtration membrane surface was better. Moreover, the composite membranes showed excellent filtration efficiency for the PM 0.3-5 , which was 99.999% for 0.3 μm particle.
研究领域:
材料科学
·
环境工程
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DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 12
·1998
·
IF 4.329
Ebuka A. Ogbuoji,Amr M. Zaky,Isabel C. Escobar
The outbreak of the COVID-19 pandemic, in 2020, has accelerated the need for personal protective equipment (PPE) masks as one of the methods to reduce and/or eliminate transmission of the coronavirus across communities. Despite the availability of different coronavirus vaccines, it is still recommended by the Center of Disease Control and Prevention (CDC), World Health Organization (WHO), and local authorities to apply public safety measures including maintaining social distancing and wearing face masks. This includes individuals who have been fully vaccinated. Remarkable increase in scientific studies, along with manufacturing-related research and development investigations, have been performed in an attempt to provide better PPE solutions during the pandemic. Recent literature has estimated the filtration efficiency (FE) of face masks and respirators shedding the light on specific targeted parameters that investigators can measure, detect, evaluate, and provide reliable data with consistent results. This review showed the variability in testing protocols and FE evaluation methods of different face mask materials and/or brands. In addition to the safety requirements needed to perform aerosol viral filtration tests, one of the main challenges researchers currently face is the inability to simulate or mimic true aerosol filtration scenarios via laboratory experiments, field tests, and in vitro/in vivo investigations. Moreover, the FE through the mask can be influenced by different filtration mechanisms, environmental parameters, filtration material properties, number of layers used, packing density, fiber charge density, fiber diameter, aerosol type and particle size, aerosol face velocity and concentration loadings, and infectious concentrations generated due to different human activities. These parameters are not fully understood and constrain the design, production, efficacy, and efficiency of face masks.Keywords:coronavirus;SARS-CoV-2;personal protection equipment;aerosol;filtration
研究领域:
公共卫生
·
医学工程
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DOI
PubMed
高影响因子
Journal of Environmental Sciences
·
2022
·
IF 6.796
Rui Liu,Huan-Huan Yang,Hao Zhou,Xianliang Yi,Yang Liu
Particulate matter (PM) is the main contributor to air pollution, and filtration has been reported to be promising for PM capturing. Considering the complexity of polluted air (volatile organic compounds (VOCs) and ozone are likely concomitant with PM particles) and in view of the versatility of MnO 2 for the degradation of VOCs and ozone, the feasibility of MnO 2 materials as PM filtering media was investigated in this study, and the effect of crystal structure on PM filtration was clarified. Compared with the layered δ-MnO 2 , the MnO 2 with tunnel structure (including 1 × 2-, 2 × 2- and 3 × 3-MnO 2 ) exhibited greatly enhanced PM removal efficiencies, and particularly, the 3 × 3-MnO 2 possessed not only significant activity for adsorbing PM particles but also high utilization efficiency of the active surface. Physicochemical properties of the adsorbents were studied by XRD, ATR, isothermal N 2 adsorption, SEM and (HR)TEM. The correlation between pore characteristics and particle elimination activity demonstrates that the most developed mesoporous structure of the 3 × 3-MnO 2 sample played an important role in strengthening the PM adsorption capability. Further comparison of the surface properties of the fresh and spent samples reveals that with respective to the occasion of δ-MnO 2 , the structure of 3 × 3-MnO 2 was robust enough to resist collapse after PM capturing and the great accommodation of the inorganic and organic PM substances in the voluminous pores induced strong affinity between PM particles and 3 × 3-MnO 2 . Thereby, a higher particle filtration ability was retained.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Mingxing Chen,Jiawang Sun,Qian Hu,Xinya Wang,Wei Zhang,Yonggui Li
Particulate matter (PM) pollution is widely recognized as a major threat to public health, making the development of thermally stable filters for particulate removal in high-temperature environments critically important. However, the common polymer-based nanofiber air filters are inadequate stability when exposed to high temperature. In this study, the poly (m-phenylene isophthalamide) (PMIA) and nano barium titanate (BaTiO 3 ) which showed remarkable thermal endurance was utilized to prepare the PMIA/BaTiO 3 composite nanofiber air filter. The structure and performance of nanofibers were regulated by changing the addition of BaTiO 3 . The PMIA/BaTiO 3 nanofiber air filter with nano-protrusion structure exhibits high PM2.5 filtration efficiency (98.7%) and low pressure drop (60.4 Pa). Even after being exposed to treatment at 250°C, the PMIA/BaTiO 3 composite nanofiber air filter can still maintain stable filtration performance. The results showed that PMIA/BaTiO 3 nanofiber materials hold promise for eliminating particulate matter in high-temperature environments.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Liang Jiang,Long Zhang,Xinjian He,Mengke Tang,Cunmin Wang,Chao Xu,Xiang Li,Xuanjin Zhu,Ruizi Chen,Yifan Zhang,Jiang Shao,Mingming Zhang,Yabin Zhu,Huan Xu
The advent of multifunctional nanofibrous membranes (NFMs) has led to the development of next-generation air filters that are ready to intercept fine particulate matters (PMs) and monitor the respiratory diseases. However, it is still challenging to fabricate biodegradable NFMs featuring the desirable combination of high filtration efficiencies, low air resistance, and intelligent real-time monitoring. Herein, a hierarchical nanopatterning approach was proposed to functionalize the stereocomplexed poly(lactic acid) (PLA) (SC-PLA) nanofibers via the combined electrospinning of SC-PLA and electrospray of CNT@ZIF-8 nanohybrids. The nanopatterned SC-PLA (NSC-PLA) NFMs were characterized by largely increased surface activity and electroactivity, as evidenced by the nearly two-fold increase in surface potential (up to 7.3 kV) and substantial improvements in the dielectric properties. Furthermore, the NSC-PLA NFMs exhibited excellent tribo-output performance, yielding a voltage of as high as 13.5 V for NSC-PLA NFMs loaded 10 % nanohybrids (NSC-PLA10). In particular, the exceptionally high electroactivity and unique protrusion structure together contributed to promote the filtration efficiencies, while providing a low pressure drop (e.g., 96.1 % for PM 2.5 and 88.3 % for PM 0.3 , only 67.6 Pa of NSC-PLA10, at 32 L/min). More importantly, NSC-PLA NFMs enabled real-time monitoring of physiological signals during different respiratory states, as evidenced by the output voltages of 17.2, 32.9 and 37.5 mV for normal breath, fast breath and cough recorded by NSC-PLA10. The proposed NSC-PLA NFMs show enormous potential in the fields of air filtration and real-time respiratory monitoring, thus providing ecofriendly solutions to personal health management.
研究领域:
材料科学
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环境科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Xinyi Zhou,Qisi Dai,Zhiwei Liu,Aoyun Cheng,Hang Qin,Wenming Guo,Pengzhao Gao,Hanning Xiao
In order to improve filtration efficiency and anti-fouling ability, ring and line patterns were introduced on disc ceramic membranes due to improved hydrodynamic conditions. The merits of the line-patterned disc ceramic membrane (LPM) and ring-patterned disc ceramic membrane (RPM) were assessed through computational fluid dynamics (CFD) and corroborated by ceramic slurry filtration tests. Patterned membranes offered advantages over smooth membranes (SM) in mitigating membrane fouling. Furthermore, LPM had been demonstrated to exhibit superior performance to RPM. The average and maximum velocities of the LPM were observed to increase by an average of 19.35 % and 23.93 %, respectively, at three rotational speeds (249 rpm, 430 rpm and 621 rpm) in comparison to the SM. Additionally, the average and maximum shear stresses of the LPM demonstrated an average increase of 55.83 % and 389.81 %, respectively. At transmembrane pressures (TMP) of 0.25 bar, 0.5 bar and 0.75 bar, the normalized permeate fluxes of LPM were 0.1, 0.18, and 0.23 higher than those of SM respectively. High shear stress and velocity bring particles from the membrane surface back into the fluid, mitigating membrane fouling and flux decay. The results suggest that the introduction of patterns morphology is an effective method to improve the fouling resistance of disc ceramic membranes.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 88
·85545-85550
·
IF 3.289
Zhiqiang Cheng,Yingying Zhang,Zhaolian Han,Liying Cui,Lijuan Kang,Fanli Zhang
A novel 3D filtration medium for airborne particles was prepared using an electrospinning technique, wherein PVA and PAN were used as a reinforcing agent and a bulk material for the filtration membrane, respectively. In order to improve the filtration efficiency and mechanical property of the membrane, the membrane was modified by a certain concentration mixture of GA, acetone and acetic acid, which could reduce the number of hydroxyl groups, promote its stability and increase the compactness via a bond between fibers. Simultaneously, the mechanical property of the membrane was measured by a tensile tester, and the results demonstrated that the maximum strain and toughness reached 144.58% and 5.33 J g−1, respectively. After that, the membrane was used as an air purification material for testing air particles content and the particles intercept principle has been discussed. The filtration performance of the membrane demonstrated that the membrane possessed excellent removing efficiency for air suspension with lower pressure drop compared with commercial masks under the same testing conditions. The filtration efficiency for the particles, sized 0.3 to 7 μm, was found to be approximately 99%. Furthermore, we also developed an effective avenue to fabricate a filtration medium based on the a steel wire for applications in ultra condition.
研究领域:
材料科学
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环境科学
·
纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Lu Wang,Yang Kang,Cheng-Yuan Xing,Kun Guo,Xiao-Qin Zhang,Li-Sheng Ding,Sheng Zhang,Bang-Jing Li
Airborne particulate matter (PM) pollution has become a serious environmental problem. Thus, there is a need for the development of air filters with satisfactory overall performance. In this paper, we develop a kind of β-cyclodextrin (β-CD) based air filter with high strength, which has not only high filtration efficiency (about 99%) but also good air permeability (the pressure drop is only 45Pa). Especially after long-term application, the pression drop of β-cyclodextrin based was less than half of the commercial air-filter. Additionally, the material can capture the toxic gasous chemicals (e.g. formaldehyde and SO 2 ). The introduction of β-CD is supposed to be the key factor for improvement of air filter.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Xingzi Lan,Xin Chen,Yuli Luo,Xiangjie Lai,Yiliang Bao,Xinyu Chen,Yurong Liu,Hehui Zheng,Han Wang,Yadong Tang
Respiration, as a basic human physiological process, can be used as a vital indicator for early disease diagnosis. Moreover, the prevention of respiratory diseases caused by particulate matter and bacteria is of great importance. Herein, a smart face mask with self-powered real-time respiratory monitoring, efficient filtration and excellent antibacterial activity was fabricated by electrospinning. By applying polyvinylidene fluoride (PVDF)/ε-poly (L-lysine)(ε-PL) and poly (ε-caprolactone)(PCL)/gelatin nanofibrous membranes as contact electrification pairs, the triboelectric nanogenerator assembled into a face mask could detect different breathing frequencies and intensities without external power supply. The electrical output performance was increased with the increment of PVDF concentration and the introduction of gelatin. Efficient filtration of particulate matter was achieved under a low pressure drop. Furthermore, PVDF/ε-PL nanofibrous membrane also exhibited excellent antibacterial activity, thus reducing the risk of respiratory infection. The prepared smart face mask is hopeful for personal healthcare management and prevention of respiratory diseases.
研究领域:
生物医学工程
·
材料科学
·
呼吸系统健康
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2021
·
IF 3.739
Chengwei Xu,Yan Yu,Xiaodong Si
The surface wettability of fibers in coalescing filter has a critical effect on filter’s performance. In this study, we employed common glass fiber filters as model and prepared superoleophilic and superoleophobic surface filters via a facile dip-coating method. The superoleophilic treatment shows a considerable reduction in pressure drop. The wet pressure drop at saturation decrease from 12.91 kPa to 8.56 kPa after superoleophilic coating. The filtration efficiency of fine particles (<100 nm) increase owing to coating treatment. The combinations of superoleophilic and superoleophobic filter and drainage strategy were also evaluated. The results show that the combination has no advantage due to emergency turn of wettability. The drainage layer with appropriate rank could enhance the drainage rate at unsaturation stage. However, the drainage strategy is never a good idea to improving coalescence performance because it brings the extra pressure drop.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Zihan Hu,Feijie Wang,Yichi Liu,Shufeng Ma,Shiqiang Ouyang,Mengdi Li,Yiting Wu,Liqiang Wang
On construction sites impacted by particulate matter and hazardous gases, portable integrated air filtration equipment with high efficiency, minimal pressure drops and ammonia (NH 3 ) alarms is critical. Triboelectric nanogenerators (TENG) present a sustainable solution by generating self-powered electricity to fulfill these requirements. In this study, we synthesized zeolitic imidazolate framework-8 (ZIF-8) in situ on the surface of titanium carbide (Ti 3 C 2 T x ) to create Ti 3 C 2 T x /ZIF-8, grafted it onto cellulose diacetate via tetraethyl orthosilicate, and ultimately developed a cellulose-based nanofibrous membrane through electrospinning, combining it with a negative triboelectric material to construct a self-powered TENG-based mask. The device achieved a balance between a low pressure drop (61 Pa) and high filtration efficiency (99.21 %, 99.71 %, and 99.98 % for PM 0.3 , PM 0.5 , and PM 1 , respectively). Furthermore, the device responds swiftly to NH 3 ; at a concentration of 100 ppm NH 3 , it achieves a rapid response rate of 83 %, with a response/recovery time as low as 12/14 s. Notably, the device retains its rapid sterilization capability within a short duration (20 min) and demonstrates remarkable stability across its various performance metrics, even after multiple washes. This study presents a novel approach to the development of multi-use, self-powered wearable devices featuring excellent air filtration performance and NH 3 detection capabilities.
研究领域:
环境科学
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）