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Zhao W, Wang M, Yao Y, Cheng Z, Shen Y, Zhang Y, Tao J, Xiong J, Cao H, Zhang D. Hyperbranched Polymer Induced Antibacterial Tree-Like Nanofibrous Membrane for High Effective Air Filtration. Macromol Rapid Commun 2024; 45:e2300685. [PMID: 38339795 DOI: 10.1002/marc.202300685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/21/2024] [Indexed: 02/12/2024]
Abstract
The air filtration materials with high efficiency, low resistance, and extra antibacterial property are crucial for personal health protection. Herein, a tree-like polyvinylidene fluoride (PVDF) nanofibrous membrane with hierarchical structure (trunk fiber of 447 nm, branched fiber of 24.7 nm) and high filtration capacity is demonstrated. Specifically, 2-hydroxypropyl trimethyl ammonium chloride terminated hyperbranched polymer (HBP-HTC) with near-spherical three-dimensional molecular structure and adjustable terminal positive groups is synthesized as an additive for PVDF electrospinning to enhance the jet splitting and promote the formation of branched ultrafine nanofibers, achieving a coverage rate of branched nanofibers over 90% that is superior than small molecular quaternary ammonium salts. The branched nanofibers network enhances mechanical properties and filtration efficiency (99.995% for 0.26 µm sodium chloride particles) of the PVDF/HBP-HTC membrane, which demonstrates reduced pressure drop (122.4 Pa) and a quality factor up to 0.083 Pa-1 on a 40 µm-thick sample. More importantly, the numerous quaternary ammonium salt groups of HBP-HTC deliver excellent antibacterial properties to the PVDF membranes. Bacterial inhibitive rate of 99.9% against both S. aureus and E. coli is demonstrated in a membrane with 3.0 wt% HBP-HTC. This work provides a new strategy for development of high-efficiency and antibacterial protection products.
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Affiliation(s)
- Weitao Zhao
- College of Intelligent Textiles and Materials, Changzhou Vocational Institute of Textile and Garment, Changzhou, 213164, China
- College of Textile and Clothing Engineering, Soochow University, Suzhou, 215123, China
| | - Mengxuan Wang
- College of Textile and Clothing Engineering, Soochow University, Suzhou, 215123, China
| | - Ying Yao
- College of Textile and Clothing Engineering, Soochow University, Suzhou, 215123, China
| | - Zhongqiu Cheng
- College of Textile and Clothing Engineering, Soochow University, Suzhou, 215123, China
| | - Yaxinru Shen
- College of Textile and Clothing Engineering, Soochow University, Suzhou, 215123, China
| | - Yufan Zhang
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 201620, China
| | - Jin Tao
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 201620, China
- Department of Textile, Garment and Design, Changshu Institute of Technology, Suzhou, 215500, China
| | - Jiaqing Xiong
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 201620, China
| | - Hongmei Cao
- Jiangsu Province Engineering Research Center of Special Functional Textile Materials, Changzhou Vocational Institute of Textile and Garment, Changzhou, 213164, China
| | - Desuo Zhang
- College of Textile and Clothing Engineering, Soochow University, Suzhou, 215123, China
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2
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Kim M, Yang E, Liang Y, Kim S, Byun J, Kim H, Choi H. Rational Design of a Necklace-like ZIF-67/Poly(vinylidene fluoride) Electrospun Nanofiber Hybrid Membrane for Simultaneous Removal of PM 0.3 and SO 2. ACS Appl Mater Interfaces 2024. [PMID: 38471079 DOI: 10.1021/acsami.4c00523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
Growing concerns over poor air quality, especially in urban and industrial regions, have led to increased global demands for advanced air-purification technologies. However, the stability and airborne pollutant control abilities of the available air-purification materials under diverse environmental conditions are limited. Thus, the advanced development of filtration materials that can effectively control different types of pollutants, such as particulate matter (PM) and gaseous pollutants, simultaneously has attracted attention. The zeolitic imidazolate framework (ZIF), a type of porous metal-organic framework (MOF), is a promising material for capturing weakly acidic toxic gases such as SO2 owing to its excellent adsorption performance and high thermal and chemical stability. In this study, we successfully developed an ultrastable necklace-like multifunctional hybrid membrane via the cetyltrimethylammonium bromide-assisted in situ growth of zeolitic imidazolate framework (ZIF)-67 crystals on electrospun Co2+-doped poly(vinylidene fluoride) nanofibers (70 nm) that can be used in different moisture environments to achieve sustainable air-filtration performance. The hybrid nanocomposite membrane demonstrated excellent performance for the simultaneous control of intractable fine PM0.3 (filtration efficiency, 99.461%) and SO2 (adsorption capacity, 1476.5 mg g-1) under different humidity conditions. This study contributes to the optimal synergistic integration of the advanced metal-organic framework (MOF)-nanofiber nanocomposite membranes and can guide the rational design and conceptualization of a facile and novel membrane for various applications in the environmental science and energy fields.
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Affiliation(s)
- Minbeom Kim
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Eunmok Yang
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Yejin Liang
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Soyoung Kim
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Jaehyun Byun
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Hyeonseo Kim
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Heechul Choi
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
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3
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Toptaş A, Çalışır MD, Kılıç A. Production of Ultrafine PVDF Nanofiber-/Nanonet-Based Air Filters via the Electroblowing Technique by Employing PEG as a Pore-Forming Agent. ACS Omega 2023; 8:38557-38565. [PMID: 37867706 PMCID: PMC10586252 DOI: 10.1021/acsomega.3c05509] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 09/19/2023] [Indexed: 10/24/2023]
Abstract
Particles with diameters smaller than 2.5 μm (PM2.5) can penetrate the respiratory system and have negative impacts on human health. Filter media with a porous surface and nanofiber/nanonet structure demonstrate superior filtration performance compared to traditional nano- and microfiber-based filters. In this study, nanostructured filters were produced using the electroblowing method from solutions containing different ratios of poly(vinylidene fluoride) (PVDF) and polyethylene glycol (PEG) polymers for the first time. By increasing the water-soluble PEG ratio in PVDF/PEG blend nanofibers and employing a water bath treatment to the produced mat afterward, a more porous fibrous structure was obtained with a lower average fiber diameter. Notably, the removal of PEG from the PVDF/PEG (3-7) sample, which had the highest PEG content, exhibited clustered nanofiber-/nanonet-like structures with average diameters of 170 and 50 nm at the points where the fibers intersect. Although this process resulted in a slight decrease in the filtration efficiency (-1.3%), the significant reduction observed in pressure drop led to a 3.2% increase in the quality factor (QF). Additionally, by exploiting the polarizability of PVDF under an electric field, the filtration efficiency of the nanostructured PVDF filters enhanced with a ratio of 3.6% after corona discharge treatment leading to a 60% improvement in the QF. As a result, the PVDF/PEG (3-7) sample presented an impressive filtration efficiency of 99.57%, a pressure drop (ΔP) of 158 Pa, and a QF of 0.0345 Pa-1.
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Affiliation(s)
- Ali Toptaş
- TEMAG
Laboratories, Textile Technol. and Design Faculty, Istanbul Technical University, 34437 Istanbul, Turkey
- Safranbolu
Vocational School, Karabuk University, 78600 Karabuk, Turkey
| | - Mehmet Durmuş Çalışır
- TEMAG
Laboratories, Textile Technol. and Design Faculty, Istanbul Technical University, 34437 Istanbul, Turkey
- Faculty
of Engineering and Architecture, Recep Tayyip
Erdogan University, 53100 Rize, Turkey
| | - Ali Kılıç
- TEMAG
Laboratories, Textile Technol. and Design Faculty, Istanbul Technical University, 34437 Istanbul, Turkey
- Areka
Advanced Technologies LLC, 34467 Istanbul, Turkey
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Cimini A, Imperi E, Picano A, Rossi M. Electrospun nanofibers for medical face mask with protection capabilities against viruses: State of the art and perspective for industrial scale-up. Appl Mater Today 2023; 32:101833. [PMID: 37152683 PMCID: PMC10151159 DOI: 10.1016/j.apmt.2023.101833] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 04/13/2023] [Accepted: 04/25/2023] [Indexed: 05/09/2023]
Abstract
Face masks have proven to be a useful protection from airborne viruses and bacteria, especially in the recent years pandemic outbreak when they effectively lowered the risk of infection from Coronavirus disease (COVID-19) or Omicron variants, being recognized as one of the main protective measures adopted by the World Health Organization (WHO). The need for improving the filtering efficiency performance to prevent penetration of fine particulate matter (PM), which can be potential bacteria or virus carriers, has led the research into developing new methods and techniques for face mask fabrication. In this perspective, Electrospinning has shown to be the most efficient technique to get either synthetic or natural polymers-based fibers with size down to the nanoscale providing remarkable performance in terms of both particle filtration and breathability. The aim of this Review is to give further insight into the implementation of electrospun nanofibers for the realization of the next generation of face masks, with functionalized membranes via addiction of active material to the polymer solutions that can give optimal features about antibacterial, antiviral, self-sterilization, and electrical energy storage capabilities. Furthermore, the recent advances regarding the use of renewable materials and green solvent strategies to improve the sustainability of electrospun membranes and to fabricate eco-friendly filters are here discussed, especially in view of the large-scale nanofiber production where traditional membrane manufacturing may result in a high environmental and health risk.
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Affiliation(s)
- A Cimini
- Department of Basic and Applied Sciences for Engineering, University of Rome Sapienza, Rome 00161, Italy
- LABOR s.r.l., Industrial Research Laboratory, Via Giacomo Peroni, 386, Rome, Italy
| | - E Imperi
- LABOR s.r.l., Industrial Research Laboratory, Via Giacomo Peroni, 386, Rome, Italy
| | - A Picano
- LABOR s.r.l., Industrial Research Laboratory, Via Giacomo Peroni, 386, Rome, Italy
| | - M Rossi
- Department of Basic and Applied Sciences for Engineering, University of Rome Sapienza, Rome 00161, Italy
- Research Center for Nanotechnology for Engineering of Sapienza (CNIS), University of Rome Sapienza, Rome 00185, Italy
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Yang Y, Wang H, Wang C, Chen Y, Dang B, Liu M, Zhang X, Li Y, Sun Q. Dual-Network Structured Nanofibrous Membranes with Superelevated Interception Probability for Extrafine Particles. ACS Appl Mater Interfaces 2023. [PMID: 36907989 DOI: 10.1021/acsami.3c01385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Airborne particulate matter (PM) pollution has caused a public health threat, including nanoscale particles, especially with emerging infectious diseases and indoor and vehicular environmental pollution. However, most existing indoor air filtration units are expensive, energy-intensive, and bulky, and there is an unavoidable trade-off between low-efficiency PM0.3/pathogen interception, PM removal, and air resistance. Herein, we designed and synthesized a two-dimensional continuous cellulose-sheath/net with a unique dual-network corrugated architecture to manufacture high-efficiency air filters and even N95 particulate face mask. Combined with its sheath/net structured pores (size 100-200 nm) consisting of a cellulose framework (1-100 nm diameter), the cellulose sheath/net filter offers high-efficiency air filtration (>99.5338%, Extrafine particles; >99.9999%, PM2.5), low-pressure drops, and a robustness quality factor of >0.14 Pa-1, utilizing their ultralight weight of 30 mg/m2 and physical adhesion and sieving behaviors. Simultaneously, masks prepared with cellulose-sheath/net filters are more likely to capture and block smaller particles than the N95 standard. The synthesis of such materials with their nanoscale features and designed macrostructures may suggest new design criteria for a novel generation of high-efficiency air filter media for different applications such as personal protection products and industrial dust removal.
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Affiliation(s)
- Yushan Yang
- College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou 311300, P. R. China
| | - Hanwei Wang
- College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou 311300, P. R. China
| | - Chao Wang
- College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou 311300, P. R. China
| | - Yipeng Chen
- College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou 311300, P. R. China
| | - Baokang Dang
- College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou 311300, P. R. China
| | - Ming Liu
- Guangxi Fenglin Wood Industry Group Co., Ltd., Nanning 530000, P. R. China
| | - Xiaochun Zhang
- College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou 311300, P. R. China
| | - Yingying Li
- College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou 311300, P. R. China
| | - Qingfeng Sun
- College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou 311300, P. R. China
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Espinoza-Montero PJ, Montero-Jiménez M, Rojas-Quishpe S, Alcívar León CD, Heredia-Moya J, Rosero-Chanalata A, Orbea-Hinojosa C, Piñeiros JL. Nude and Modified Electrospun Nanofibers, Application to Air Purification. Nanomaterials (Basel) 2023; 13:nano13030593. [PMID: 36770554 PMCID: PMC9919942 DOI: 10.3390/nano13030593] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 01/24/2023] [Accepted: 01/29/2023] [Indexed: 05/17/2023]
Abstract
Air transports several pollutants, including particulate matter (PM), which can produce cardiovascular and respiratory diseases. Thus, it is a challenge to control pollutant emissions before releasing them to the environment. Until now, filtration has been the most efficient processes for removing PM. Therefore, the electrospinning procedure has been applied to obtain membranes with a high filtration efficiency and low pressure drop. This review addressed the synthesis of polymers that are used for fabricating high-performance membranes by electrospinning to remove air pollutants. Then, the most influential parameters to produce electrospun membranes are indicated. The main results show that electrospun membranes are an excellent alternative to having air filters due to the versatility of the process, the capacity for controlling the fiber diameter, porosity, high filtration efficiency and low-pressure drop.
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Affiliation(s)
- Patricio J. Espinoza-Montero
- Escuela de Ciencia Químicas, Pontificia Universidad Católica del Ecuador, Quito 17012184, Ecuador
- Correspondence: ; Tel.: +593-2299-1700 (ext. 1929)
| | - Marjorie Montero-Jiménez
- Escuela de Ciencia Químicas, Pontificia Universidad Católica del Ecuador, Quito 17012184, Ecuador
| | - Stalin Rojas-Quishpe
- Facultad de Ciencias Químicas, Universidad Central del Ecuador, Quito 170521, Ecuador
| | | | - Jorge Heredia-Moya
- Centro de Investigación Biomédica (CENBIO), Facultad de Ciencias de la Salud Eugenio Espejo, Universidad UTE, Quito 170527, Ecuador
| | - Alfredo Rosero-Chanalata
- Escuela de Ciencia Químicas, Pontificia Universidad Católica del Ecuador, Quito 17012184, Ecuador
- Facultad de Ciencias Químicas, Universidad Central del Ecuador, Quito 170521, Ecuador
| | - Carlos Orbea-Hinojosa
- Departamento de Ciencias Exactas, Universidad de Las Fuerzas Armadas ESPE, Av. Gral. Rumiñahui S/N, Sangolquí P.O. Box 171-5-231B, Ecuador
| | - José Luis Piñeiros
- Escuela de Ciencia Químicas, Pontificia Universidad Católica del Ecuador, Quito 17012184, Ecuador
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Shao W, Li J, Zhang Y, Sun N, Wu T, Yan M, Liu F, Jiang H, Chen X, He J. Polyvinylidene fluoride multi-scale nanofibrous membrane modified using N-halamine with high filtration efficiency and durable antibacterial properties for air filtration. J Colloid Interface Sci 2022; 628:627-36. [PMID: 36027773 DOI: 10.1016/j.jcis.2022.08.077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 08/07/2022] [Accepted: 08/11/2022] [Indexed: 12/14/2022]
Abstract
HYPOTHESIS Particulate matter (PM) pollution and the coronavirus (COVID-19) pandemic have increased demand for protective masks. However, typical protective masks only intercept particles and produce peculiar odors if worn for extended periods owing to bacterial growth. Therefore, new protective materials with good filtration and antibacterial capabilities are required. EXPERIMENTS In this study, we prepared multi-scale polyvinylidene fluoride (PVDF) nanofibrous membranes for efficient filtration and durable antibacterial properties via N-halamine modification. FINDINGS The N-halamine-modified nanofibrous membrane (PVDF-PAA-TMP-Cl) had sufficient active chlorine content (800 ppm), and the tensile stress and strain were improved compared with the original membrane, from 6.282 to 9.435 MPa and from 51.3 % to 56.4 %, respectively. To further improve the interception efficiency, ultrafine nanofibers (20-35 nm) were spun on PVDF-PAA-TMP-Cl nanofibrous membranes, and multi-scale PVDF-PAA-TMP-Cl nanofibrous membranes were prepared. These membranes exhibited good PM0.3 interception (99.93 %), low air resistance (79 Pa), promising long-term PM2.5 purification ability, and high bactericidal efficiency (>98 %). After ten chlorination cycles, the antibacterial efficiency against Escherichia coli and Staphylococcus aureus exceeded 90 %; hence, the material demonstrated highly efficient filtration and repeatable antibacterial properties. The results of this study have implications for the development of air and water filtration systems and multi-functional protective materials.
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Magnani A, Capaccioli S, Azimi B, Danti S, Labardi M. Local Piezoelectric Response of Polymer/Ceramic Nanocomposite Fibers. Polymers (Basel) 2022; 14:polym14245379. [PMID: 36559746 PMCID: PMC9783531 DOI: 10.3390/polym14245379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 11/29/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022] Open
Abstract
Effective converse piezoelectric coefficient (d33,eff) mapping of poly(vinylidene fluoride) (PVDF) nanofibers with ceramic BaTiO3 nanoparticle inclusions obtained by electrospinning was carried out by piezoresponse force microscopy (PFM) in a peculiar dynamic mode, namely constant-excitation frequency-modulation (CE-FM), particularly suitable for the analysis of compliant materials. Mapping of single nanocomposite fibers was carried out to demonstrate the ability of CE-FM-PFM to investigate the nanostructure of semicrystalline polymers well above their glass transition temperature, such as PVDF, by revealing the distribution of piezoelectric activity of the nanofiber, as well as of the embedded nanoparticles employed. A decreased piezoelectric activity at the nanoparticle site compared to the polymeric fiber was found. This evidence can be rationalized in terms of a tradeoff between the dielectric constants and piezoelectric coefficients of the component materials, as well as on the mutual orientation of polar axes.
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Affiliation(s)
- Aurora Magnani
- Dipartimento di Fisica “Enrico Fermi”, Università di Pisa, Largo Pontecorvo 3, 56127 Pisa, Italy
| | - Simone Capaccioli
- Dipartimento di Fisica “Enrico Fermi”, Università di Pisa, Largo Pontecorvo 3, 56127 Pisa, Italy
- CNR-IPCF, Pisa Unit, Largo Pontecorvo 3, 56127 Pisa, Italy
- CISUP, Centro per l’Integrazione della Strumentazione dell’Università di Pisa, 56126 Pisa, Italy
| | - Bahareh Azimi
- Dipartimento di Ingegneria Civile ed Industriale (DICI), Università di Pisa, L. Lazzarino 1, 56122 Pisa, Italy
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, 56126 Pisa, Italy
| | - Serena Danti
- Dipartimento di Ingegneria Civile ed Industriale (DICI), Università di Pisa, L. Lazzarino 1, 56122 Pisa, Italy
| | - Massimiliano Labardi
- CNR-IPCF, Pisa Unit, Largo Pontecorvo 3, 56127 Pisa, Italy
- Correspondence: ; Tel.: +39-050-2214322
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Robert B, Nallathambi G. Molecular entrapment of formaldehyde and filtering particulate matter using electrospun polyacrylonitrile/polyethylenimine nanofibers. J Polym Res 2022. [DOI: 10.1007/s10965-022-03341-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Cho Y, Son Y, Ahn J, Lim H, Ahn S, Lee J, Bae PK, Kim ID. Multifunctional Filter Membranes Based on Self-Assembled Core-Shell Biodegradable Nanofibers for Persistent Electrostatic Filtration through the Triboelectric Effect. ACS Nano 2022; 16:19451-19463. [PMID: 36374248 DOI: 10.1021/acsnano.2c09165] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The massive production of polymer-based respiratory masks during the COVID-19 pandemic has rekindled the issue of environmental pollution from nonrecyclable plastic waste. To mitigate this problem, conventional filters should be redesigned with improved filtration performance over the entire operational life while also being naturally degradable at the end. Herein, we developed a functional and biodegradable polymeric filter membrane consisting of a polybutylene adipate terephthalate (PBAT) matrix blended with cetyltrimethylammonium bromide (CTAB) and montmorillonite (MMT) clay, whose surface properties have been modified through cation exchange reactions for good miscibility with PBAT in an organic solvent. Particularly, the spontaneous evolution of a partial core-shell structure (i.e., PBAT core encased by CTAB-MMT shell) during the electrospinning process amplified the triboelectric effect as well as the antibacterial/antiviral activity that was not observed in naive PBAT. Unlike the conventional face mask filter that relies on the electrostatic adsorption mechanism, which deteriorates over time and/or due to external environmental factors, the PBAT@CTAB-MMT nanofiber membrane (NFM)-based filter continuously retains electrostatic charges on the surface due to the triboelectric effect of CTAB-MMT. As a result, the PBAT@CTAB-MMT NFM-based filter showed high filtration efficiencies (98.3%, PM0.3) even at a low differential pressure of 40 Pa or less over its lifetime. Altogether, we not only propose an effective and practical solution to improve the performance of filter membranes while minimizing their environmental footprint but also provide valuable insight into the synergetic functionalities of organic-inorganic hybrid materials for applications beyond filter membranes.
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Affiliation(s)
- Yujang Cho
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon34141, Republic of Korea
| | - Yongkoo Son
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon34141, Republic of Korea
| | - Jaewan Ahn
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon34141, Republic of Korea
| | - Haeseong Lim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon34141, Republic of Korea
| | - Seongcheol Ahn
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon34141, Republic of Korea
| | - Jiyoung Lee
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon34141, Republic of Korea
| | - Pan Kee Bae
- BioNano Health Guard Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon34141, Republic of Korea
| | - Il-Doo Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon34141, Republic of Korea
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11
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Hu S, Zheng Z, Tian Y, Zhang H, Wang M, Yu Z, Zhang X. Preparation and Characterization of Electrospun PAN-CuCl2 Composite Nanofiber Membranes with a Special Net Structure for High-Performance Air Filters. Polymers (Basel) 2022; 14:polym14204387. [PMID: 36297966 PMCID: PMC9611402 DOI: 10.3390/polym14204387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 10/09/2022] [Accepted: 10/10/2022] [Indexed: 11/30/2022] Open
Abstract
The growing issue of particulate matter (PM) air pollution has given rise to extensive research into the development of high-performance air filters recently. As the core of air filters, various types of electrospun nanofiber membranes have been fabricated and developed. With the novel poly(acrylonitrile) (PAN)-CuCl2 composite nanofiber membranes as the filter membranes, we demonstrate the high PM removal efficiency exceeding 99% and can last a long service time. The nanoscale morphological characteristics of nanofiber membranes were investigated by scanning electron microscopy, transmission electron microscopy, and mercury intrusion porosimeter. It is found that they appear to have a special net structure at specific CuCl2 concentrations, which substantially improves PM removal efficiency. We anticipate the PAN-CuCl2 composite nanofiber membranes will be expected to effectively solve some pressing problems in air filtration.
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Affiliation(s)
- Shiqian Hu
- Department of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China
| | - Zida Zheng
- Department of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China
| | - Ye Tian
- Department of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China
| | - Huihong Zhang
- Department of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China
- Correspondence: (H.Z.); (X.Z.)
| | - Mao Wang
- Nantong Hongda Petrochemical Equipment Manufacturing Co., Ltd., Nantong 226010, China
| | - Zhongwei Yu
- Nantong Hongda Petrochemical Equipment Manufacturing Co., Ltd., Nantong 226010, China
| | - Xiaowei Zhang
- Department of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China
- National Laboratory of Solid State Microstructures, Department of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
- Correspondence: (H.Z.); (X.Z.)
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Iravani S, Varma RS. MXene-Based Photocatalysts in Degradation of Organic and Pharmaceutical Pollutants. Molecules 2022; 27:molecules27206939. [PMID: 36296531 PMCID: PMC9606916 DOI: 10.3390/molecules27206939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 10/07/2022] [Accepted: 10/12/2022] [Indexed: 11/16/2022]
Abstract
These days, explorations have focused on designing two-dimensional (2D) nanomaterials with useful (photo)catalytic and environmental applications. Among them, MXene-based composites have garnered great attention owing to their unique optical, mechanical, thermal, chemical, and electronic properties. Various MXene-based photocatalysts have been inventively constructed for a variety of photocatalytic applications ranging from pollutant degradation to hydrogen evolution. They can be applied as co-catalysts in combination with assorted common photocatalysts such as metal sulfide, metal oxides, metal-organic frameworks, graphene, and graphitic carbon nitride to enhance the function of photocatalytic removal of organic/pharmaceutical pollutants, nitrogen fixation, photocatalytic hydrogen evolution, and carbon dioxide conversion, among others. High electrical conductivity, robust photothermal effects, large surface area, hydrophilicity, and abundant surface functional groups of MXenes render them as attractive candidates for photocatalytic removal of pollutants as well as improvement of photocatalytic performance of semiconductor catalysts. Herein, the most recent developments in photocatalytic degradation of organic and pharmaceutical pollutants using MXene-based composites are deliberated, with a focus on important challenges and future perspectives; techniques for fabrication of these photocatalysts are also covered.
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Affiliation(s)
- Siavash Iravani
- Faculty of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran
- Correspondence: (S.I.); (R.S.V.)
| | - Rajender S. Varma
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University in Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
- Correspondence: (S.I.); (R.S.V.)
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Zhang L, Hu Y, Wang X, Zhang A, Gao X, Yagoub AEGA, Ma H, Zhou C. Ultrasound-Assisted Synthesis of Potentially Food-Grade Nano-Zinc Oxide in Ionic Liquids: A Safe, Green, Efficient Approach and Its Acoustics Mechanism. Foods 2022; 11:foods11111656. [PMID: 35681406 PMCID: PMC9180576 DOI: 10.3390/foods11111656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 05/31/2022] [Accepted: 06/02/2022] [Indexed: 02/04/2023] Open
Abstract
In food application, nano-zinc oxide (nano-ZnO) is a very important nano metal material; thus, it is necessary to prepare potentially food-grade nano-ZnO. Nano-ZnO synthesized by the ultrasound-assisted method can reach a safe level because of its import physical processing characteristics. Firstly, the micromorphology and microstructure of nano-ZnO synthesized by the ultrasonic method were compared with that by the mechanical stirring method through atomic force microscopy, X-ray diffraction, and Fourier-transform infrared. Secondly, the on-line monitoring of different ultrasonic fields in real-time was studied during the whole synthesis process of nano-ZnO by polyvinylidene fluoride sensor, and two control groups (water medium) were set. The results showed that nano-ZnO obtained by the ultrasonic method were smaller in size and had less surface roughness compared with the mechanical stirring method. The nucleation and crystallization process of nano-ZnO was controlled by the ultrasonic method with sharp diffraction peaks of higher intensities. Moreover, for the ultrasonic mechanism, it was found that the oscillation behavior of bubbles varied from liquid to liquid, and variation was also found in the same liquid under different restraint of interfaces. Based on voltage waveforms monitored in the three liquid media, differences in the life cycle of cavitation bubble oscillation, cycle of collapse stage, maximum voltage amplitude, and acoustic intensity were observed. The physical mechanism of ultrasound-assisted synthesis of nano-ZnO was revealed through voltage fluctuations of the acoustics signal, which can lay a theoretical foundation for the controllability of food ultrasonic physical processing.
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Affiliation(s)
- Lei Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; (L.Z.); (Y.H.); (X.W.); (A.Z.); (X.G.); (H.M.)
| | - Yang Hu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; (L.Z.); (Y.H.); (X.W.); (A.Z.); (X.G.); (H.M.)
| | - Xue Wang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; (L.Z.); (Y.H.); (X.W.); (A.Z.); (X.G.); (H.M.)
| | - Ao Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; (L.Z.); (Y.H.); (X.W.); (A.Z.); (X.G.); (H.M.)
| | - Xianli Gao
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; (L.Z.); (Y.H.); (X.W.); (A.Z.); (X.G.); (H.M.)
| | | | - Haile Ma
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; (L.Z.); (Y.H.); (X.W.); (A.Z.); (X.G.); (H.M.)
| | - Cunshan Zhou
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; (L.Z.); (Y.H.); (X.W.); (A.Z.); (X.G.); (H.M.)
- Correspondence: ; Tel.: +86-511-88780201
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