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Tang L, Wang D, Sun S, Cheng Q, Zhang L, Xia W, Zheng J, Cui J, Wang Y, Zhou H. Fiber-in-Tube Electrifiable Structure for Virus Filtration Self-Generated Static Electricity by Vibration/Sound. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38701174 DOI: 10.1021/acsami.4c04535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2024]
Abstract
Fiber has been considered as an ideal material for virus insulation due to the readily available electrostatic adsorption. However, restricted by the electrostatic attenuation and filtration performance decline, their long-lasting applications are unable to satisfy the requirements of medical protective equipment for major medical and health emergencies such as global epidemics, which results in both a waste of resources and environmental pollution. We overcame these issues by constructing a fiber-in-tube structure, achieving the robust reusability of fibrous membranes. Core fibers within the hollow could form generators with tube walls of shell fibers to provide persistent, renewable static electricity via piezoelectricity and triboelectricity. The PM0.3 insulation efficiency achieved 98% even after 72 h of humidity and heat aging, through beating and acoustic waves, which is greatly improved compared with that of traditional nonwoven fabric (∼10% insulation). A mask spun with our fiber also has a low breathing resistance (differential pressure <24.4 Pa/cm2). We offer an approach to enrich multifunctional fiber for developing electrifiable filters, which make the fiber-in-tube filtration membrane able to durably maintain a higher level of protective performance to reduce the replacement and provide a new train of thought for the preparation of other high-performance protective products.
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Affiliation(s)
- Lianwei Tang
- State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Dong Wang
- State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Shuang Sun
- State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Qikuang Cheng
- State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Lu Zhang
- State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Weibang Xia
- State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Jiaqi Zheng
- State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Jingqiang Cui
- Henan Key Laboratory of Medical Polymer Materials Technology and Application, TuoRen Medical Device Research & Development Institute Co., Ltd., Health Technology Industry Park, Changyuan County, Henan 453000, PR China
| | - Yunming Wang
- State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Huamin Zhou
- State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
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2
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Zhou Z, Wang D, Pan Z, You T, Xu G, Liang Y, Tang M. Bioinspired Structures Made of Silicone Nanofilaments for Upcycling Waste Masks to Reusable N95 Respirators. NANO LETTERS 2024; 24:4415-4422. [PMID: 38577835 DOI: 10.1021/acs.nanolett.4c00079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
The increasing demand for personal protective equipment such as single-use masks has led to large amounts of nondegradable plastic waste, aggravating economic and environmental burdens. This study reports a simple and scalable approach for upcycling waste masks via a chemical vapor deposition technique, realizing a trichome-like biomimetic (TLB) N95 respirator with superhydrophobicity (water contact angle ≥150°), N95-level protection, and reusability. The TLB N95 respirator comprising templated silicone nanofilaments with an average diameter of ∼150 nm offers N95-level protection and breathability comparable to those of commercial N95 respirators. The TLB N95 respirator can still maintain its N95-level protection against particulate matter and viruses after 10 disinfection treatment cycles (i.e., ultraviolet irradiation, microwave irradiation, dry heating, and autoclaving), demonstrating durable reusability. The proposed strategy provides new insight into upcycle waste masks, breaking the existing design and preparation concept of reusable masks.
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Affiliation(s)
- Zhiqiang Zhou
- School of Light Industry and Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Di Wang
- School of Light Industry and Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Zhengyuan Pan
- Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Tianle You
- School of Light Industry and Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Guilong Xu
- School of Light Industry and Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Yun Liang
- School of Light Industry and Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Min Tang
- School of Light Industry and Engineering, South China University of Technology, Guangzhou, 510641, China
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3
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Gopalan T, Muhamad MR, Wai Hoe VC, Hassandarvish P. N95 respirator hybrid decontamination method using Ultraviolet Germicidal Irradiation (UVGI) coupled with Microwave-Generated Steam (MGS). PLoS One 2024; 19:e0296871. [PMID: 38319932 PMCID: PMC10846690 DOI: 10.1371/journal.pone.0296871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 12/20/2023] [Indexed: 02/08/2024] Open
Abstract
The Coronavirus Disease 2019 (COVID-19) pandemic has induced a critical supply of personal protective equipment (PPE) especially N95 respirators. Utilizing respirator decontamination procedures to reduce the pathogen load of a contaminated N95 respirator can be a viable solution for reuse purposes. In this study, the efficiency of a novel hybrid respirator decontamination method of ultraviolet germicidal irradiation (UVGI) which utilizes ultraviolet-C (UV-C) rays coupled with microwave-generated steam (MGS) against feline coronavirus (FCoV) was evaluated. The contaminated 3M 1860 respirator pieces were treated with three treatments (UVGI-only, MGS-only, and Hybrid-UVGI + MGS) with variable time. The virucidal activity was evaluated using the TCID50 method. The comparison of decontamination efficiency of the treatments indicated that the hybrid method achieved at least a pathogen log reduction of 4 logs, faster than MGS and UVGI. These data recommend that the proposed hybrid decontamination system is more effective comparatively in achieving pathogen log reduction of 4 logs.
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Affiliation(s)
- Thirumaaran Gopalan
- Department of Mechanical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Mohd Ridha Muhamad
- Department of Mechanical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur, Malaysia
- Centre of Advanced Manufacturing and Material Processing (AMMP Centre), Universiti Malaya, Kuala Lumpur, Malaysia
| | - Victor Chee Wai Hoe
- Centre for Epidemiology and Evidence-Based Practice, Department of Social and Preventive Medicine, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Pouya Hassandarvish
- Tropical Infectious Diseases Research & Education Centre, Universiti Malaya, Kuala Lumpur, Malaysia
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4
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Verma A, Yadav BC. Development and integration of a hierarchical Pd/WO 3 acetone-sensing device for real-time exhaled breath monitoring with disposable face mask. JOURNAL OF HAZARDOUS MATERIALS 2024; 463:132872. [PMID: 37924704 DOI: 10.1016/j.jhazmat.2023.132872] [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: 07/28/2023] [Revised: 10/17/2023] [Accepted: 10/24/2023] [Indexed: 11/06/2023]
Abstract
This study introduces an inventive acetone-sensing device seamlessly integrated into a disposable face mask, enabling real-time continuous breath monitoring. The sensor demonstrates exceptional sensitivity, registering a response of 8.22 at 1 ppm and an impressive sensor response of 57.33 at 100 ppm of acetone concentration. Particularly noteworthy is the remarkable lower limit of detection (LOD) of 0.076 ppm within the concentration range of 0.1-0.8 ppm, underscored by a robust R2 value of 0.994. To validate practicality, the Pd/WO3 sensor was fabricated onto cellulose paper and utilized for real-time breath analysis, yielding a substantial sensor response of 1.70 at 8 vol% (equivalent to a single exhale breath volume). The unique design incorporates a built-in disposable face mask, facilitating dependable and convenient real-time breath analysis. Additionally, this research explores the profound impact of introducing acetone and Pd atoms on the energy levels and dipole moments. The species elucidated through density functional theory (DFT) investigations encompassing WO3, WO3-acetone, Pd-WO3, and Pd-WO3-acetone species. This work presents an innovative and cost-effective approach for developing a portable, non-invasive, and highly sensitive acetone-sensing device, effectively integrated into a disposable face mask for real-time breath analysis. This pioneering technology holds immense potential for various applications in healthcare and beyond.
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Affiliation(s)
- Arpit Verma
- Nanomaterials and Sensors Research Laboratory, Department of Physics, Babasaheb Bhimrao Ambedkar University, Lucknow 226025, Uttar Pradesh, India
| | - Bal Chandra Yadav
- Nanomaterials and Sensors Research Laboratory, Department of Physics, Babasaheb Bhimrao Ambedkar University, Lucknow 226025, Uttar Pradesh, India.
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5
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Zhang Z, Ersan MS, Westerhoff P, Herckes P. Do Surface Charges on Polymeric Filters and Airborne Particles Control the Removal of Nanoscale Aerosols by Polymeric Facial Masks? TOXICS 2023; 12:3. [PMID: 38276716 PMCID: PMC10821015 DOI: 10.3390/toxics12010003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 12/10/2023] [Accepted: 12/13/2023] [Indexed: 01/27/2024]
Abstract
The emergence of facial masks as a critical health intervention to prevent the spread of airborne disease and protect from occupational nanomaterial exposure highlights the need for fundamental insights into the interaction of nanoparticles (<200 nm) with modern polymeric mask filter materials. While most research focuses on the filtration efficiency of airborne particles by facial masks based on pore sizes, pressure drop, or humidity, only a few studies focus on the importance of aerosol surface charge versus filter surface charge and their role in the net particle filtration efficiency of mask filters. In this study, experiments were conducted to assess mask filter filtration efficiency using positively and negatively charged polystyrene particles (150 nm) as challenge aerosols at varying humidity levels. Commercial masks with surface potential (Ψf) in the range of -10 V to -800 V were measured by an electrostatic voltmeter and used for testing. Results show that the mask filtration efficiency is highly dependent on the mask surface potential as well as the charge on the challenge aerosol, ranging from 60% to 98%. Eliminating the surface charge results in a maximum 43% decrease in filtration efficiency, emphasizing the importance of electrostatic charge interactions during the particle capture process. Moreover, increased humidity can decrease the surface charge on filters, thereby decreasing the mask filtration efficiency. The knowledge gained from this study provides insight into the critical role of electrostatic attraction in nanoparticle capture mechanisms and benefits future occupational and environmental health studies.
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Affiliation(s)
- Zhaobo Zhang
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85297-1604, USA;
| | - Mahmut S. Ersan
- NSF Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and the Built Environment, Ira A. Fulton Schools of Engineering, Arizona State University, Tempe, AZ 85287-3005, USA; (M.S.E.); (P.W.)
- Department of Civil Engineering, University of North Dakota, Grand Forks, ND 58202-8115, USA
| | - Paul Westerhoff
- NSF Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and the Built Environment, Ira A. Fulton Schools of Engineering, Arizona State University, Tempe, AZ 85287-3005, USA; (M.S.E.); (P.W.)
| | - Pierre Herckes
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85297-1604, USA;
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6
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Li X, Han F, Fan S, Liu Y, Zhang J, Li J. Recycling of discarded face masks for modification and use in SBS-modified bitumen. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:115152-115163. [PMID: 37880400 DOI: 10.1007/s11356-023-30570-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Accepted: 10/16/2023] [Indexed: 10/27/2023]
Abstract
Since the outbreak of the COVID-19 pandemic, the discarded face masks have attracted widespread attention in society. In line with sustainable development, a physicochemical treatment method was used to recycle discarded face masks into styrene-butadiene-styrene (SBS) modified bitumen. Utilizing the highly adhesive polydopamine-polyethyleneimine (PDA-PEI) coating, it has improved the surface damage of the discarded face mask fibers (DFMF) caused by natural aging and mechanical fragmentation, simultaneously strengthening the connection between the fibers and bitumen. At 46 °C, the 2% embellish-face mask fiber (E-FMF)/SBS modified bitumen, compared to the 2%DFMF/SBS modified bitumen, exhibited improvements in complex modulus (G*), elastic modulus (G'), and loss modulus (G″) by 12.27%, 16.39%, and 13.35%, respectively. Furthermore, at 0.1 kPa and 3.2 kPa, the creep recovery rate (R) increased by 23.3% and 32%, and the average creep compliance (Jnr) decreased by 54.7% and 64%. It was demonstrated that DFMF adhered with the coating, were more effective in improving the mechanical properties, deformation resistance, and shear resistance of the bitumen. This approach enriches the application scenarios of discarded single-use face masks and supports environmental protection and road construction.
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Affiliation(s)
- Xinyu Li
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China
| | - Fuhu Han
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China
| | - Shencheng Fan
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China
| | - Yu Liu
- Guangxi Communications Investment Technology Co., Ltd., Nanning, China
| | - Jieyu Zhang
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China
| | - Jing Li
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China.
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7
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Collings K, Boisdon C, Sham TT, Skinley K, Oh HK, Prince T, Ahmed A, Pennington SH, Brownridge PJ, Edwards T, Biagini GA, Eyers CE, Lamb A, Myers P, Maher S. Attaching protein-adsorbing silica particles to the surface of cotton substrates for bioaerosol capture including SARS-CoV-2. Nat Commun 2023; 14:5033. [PMID: 37596260 PMCID: PMC10439164 DOI: 10.1038/s41467-023-40696-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 08/07/2023] [Indexed: 08/20/2023] Open
Abstract
The novel coronavirus pandemic (COVID-19) has necessitated a global increase in the use of face masks to limit the airborne spread of the virus. The global demand for personal protective equipment has at times led to shortages of face masks for the public, therefore makeshift masks have become commonplace. The severe acute respiratory syndrome caused by coronavirus-2 (SARS-CoV-2) has a spherical particle size of ~97 nm. However, the airborne transmission of this virus requires the expulsion of droplets, typically ~0.6-500 µm in diameter (by coughing, sneezing, breathing, and talking). In this paper, we propose a face covering that has been designed to effectively capture SARS-CoV-2 whilst providing uncompromised comfort and breathability for the wearer. Herein, we describe a material approach that uses amorphous silica microspheres attached to cotton fibres to capture bioaerosols, including SARS CoV-2. This has been demonstrated for the capture of aerosolised proteins (cytochrome c, myoglobin, ubiquitin, bovine serum albumin) and aerosolised inactivated SARS CoV-2, showing average filtration efficiencies of ~93% with minimal impact on breathability.
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Affiliation(s)
- Kieran Collings
- Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, UK
| | - Cedric Boisdon
- Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, UK
| | - Tung-Ting Sham
- Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, UK
| | - Kevin Skinley
- Department of Chemistry, University of Liverpool, Liverpool, UK
| | - Hyun-Kyung Oh
- Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, UK
| | - Tessa Prince
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
| | - Adham Ahmed
- Department of Chemistry, University of Liverpool, Liverpool, UK
| | - Shaun H Pennington
- Centre for Drugs and Diagnostics, Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Liverpool, UK
| | - Philip J Brownridge
- Centre for Proteome Research, Department of Biochemistry & Systems Biology, Institute of Systems, Molecular & Integrative Biology, University of Liverpool, Liverpool, UK
| | - Thomas Edwards
- Centre for Drugs and Diagnostics, Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Liverpool, UK
| | - Giancarlo A Biagini
- Centre for Drugs and Diagnostics, Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Liverpool, UK
| | - Claire E Eyers
- Centre for Proteome Research, Department of Biochemistry & Systems Biology, Institute of Systems, Molecular & Integrative Biology, University of Liverpool, Liverpool, UK
| | - Amanda Lamb
- Faculty of Health and Life Sciences, University of Liverpool, Liverpool, UK
- Applied Health Insights Ltd, Cheshire, UK
| | - Peter Myers
- Department of Chemistry, University of Liverpool, Liverpool, UK.
| | - Simon Maher
- Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, UK.
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8
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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. APPLIED MATERIALS 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] [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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9
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Lou Z, Wang L, Yu K, Wei Q, Hussain T, Xia X, Zhou H. Electrospun PVB/AVE NMs as mask filter layer for win-win effects of filtration and antibacterial activity. J Memb Sci 2023; 672:121473. [PMID: 36785656 PMCID: PMC9908571 DOI: 10.1016/j.memsci.2023.121473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 02/05/2023] [Accepted: 02/07/2023] [Indexed: 02/11/2023]
Abstract
The COVID-19 pandemic has caused serious social and public health problems. In the field of personal protection, the facial masks can prevent infectious respiratory diseases, safeguard human health, and promote public safety. Herein, we focused on preparing a core filter layer for masks using electrospun polyvinyl butyral/apocynum venetum extract nanofibrous membranes (PVB/AVE NMs), with durable interception efficiency and antibacterial properties. In the spinning solution, AVE acted as a salt to improve electrical conductivity, and achieve long-lasting interception efficiency with adjustable pore size. It also played the role of an antibacterial agent in PVB/AVE NMs to achieve win-win effects. The hydrophobicity of PVB-AVE-6% was 120.9° whereas its filterability reached 98.3% when the pressure drop resistance was 142 Pa. PVB-AVE-6% exhibited intriguing properties with great antibacterial rates of 99.38% and 98.96% against S. aureus and E. coli, respectively. After a prolonged usability test of 8 h, the filtration efficiency of the PVB/AVE masks remained stable at over 97.7%. Furthermore, the antibacterial rates of the PVB/AVE masks on S. aureus and E. coli were 96.87% and 96.20% respectively, after using for 2 d. These results indicate that PVB/AVE NMs improve the protective performance of ordinary disposable masks, which has certain application in air filtration.
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Key Words
- AVE, apocynum venetum extract
- Air filtration
- Antibacterial properties
- Apocynum venetum extract
- CNF, cellulose nanofibres
- PA, polyamide
- PAN, polyacrylonitrile
- PLA, poly(lactic acid)
- PVB, polyvinyl butyral
- PVB/AVE NMs, polyvinyl butyral/apocynum venetum extract nanofibrous membranes
- PVDF, polyvinylidene fluoride
- Protective masks
- QF, quality factor
- WCA, water contact angle
- Win-win effects
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Affiliation(s)
- Zhuyushuang Lou
- College of Textile and Clothing, Xinjiang University, Xinjiang, Urumchi, 830046, China
| | - Ling Wang
- College of Textile and Clothing, Xinjiang University, Xinjiang, Urumchi, 830046, China
| | - Kefei Yu
- College of Textile and Clothing, Xinjiang University, Xinjiang, Urumchi, 830046, China
| | - Qufu Wei
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Tanveer Hussain
- Textile Processing Department, Faculty of Engineering & Technology, National Textile University, Sheikhupura Road, Faisalabad, 37610, Pakistan
| | - Xin Xia
- College of Textile and Clothing, Xinjiang University, Xinjiang, Urumchi, 830046, China,Corresponding author
| | - Huimin Zhou
- College of Textile and Clothing, Xinjiang University, Xinjiang, Urumchi, 830046, China,Corresponding author
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10
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Photoactive decontamination and reuse of face masks. E-PRIME - ADVANCES IN ELECTRICAL ENGINEERING, ELECTRONICS AND ENERGY 2023:100129. [PMCID: PMC9942455 DOI: 10.1016/j.prime.2023.100129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
The corona virus disease 2019 (COVID-19) pandemic has led to global shortages in disposable respirators. Increasing the recycling rate of masks is a direct, low-cost strategy to mitigate COVID-19 transmission. Photoactive decontamination of used masks attracts great attention due to its fast response, remarkable virus inactivation effect and full protection integrity. Here, we review state-of-the-art situation of photoactive decontamination. The basic mechanism of photoactive decontamination is firstly discussed in terms of ultraviolet, photothermal or photocatalytic properties. Among which, ultraviolet radiation damages DNA and RNA to inactivate viruses and microorganisms, and photothermal method damages them by destroying proteins, while photocatalysis kills them by destroying the structure. The practical applications of photoactive decontamination strategies are then fully reviewed, including ultraviolet germicidal irradiation, and unconventional masks made of functional nanomaterials with photothermal or photocatalytic properties. Their performance requirements are elaborated together with the advantages of long-term recycle use. Finally, we put forward challenges and prospects for further development of photoactive decontamination technology.
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11
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He W, Yue Y, Guo Y, Zhao YB, Liu J, Wang J. A comparison study of the filtration behavior of air filtering materials of masks against inert and biological particles. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
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12
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Deng T, Chen Y, Liu Y, Shang Z, Gong J. Constructing Janus Microsphere Membranes for Particulate Matter Filtration, Directional Water Vapor Transfer, and High-Efficiency Broad-Spectrum Sterilization. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2205010. [PMID: 36328738 DOI: 10.1002/smll.202205010] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 10/03/2022] [Indexed: 06/16/2023]
Abstract
Commercial masks have significant drawbacks, including low water vapor transmission efficiency and limited ability to inhibit harmful microorganisms, whereas in this contribution, a series of Janus microsphere membranes are developed with hierarchical structures by quenching and crystallizing 12-hydroxystearic acid and halicin layer-by-layer on a polypropylene non-woven fabric, laminating them with hydrophilic cotton fibers in a one-pot process, and further demonstrate the potential of this composite system as masks. Through further optimization, excellent superhydrophobic/superhydrophilic properties (contact angle 157.1°/0°), superior filtering effects (93.54% for PM2.5 and 98.35% for PM10 ), with a low-filtration resistance (57 Pa) and a quality factor of up to 0.072 Pa-1 are achieved, all better than that of commercial N95 masks. In addition, the membrane allows for the directional transport of water vapor from the inside out, increasing the water vapor transmission rate by more than 20% compared with the monolayer hydrophobic microsphere membrane. It also has a bactericidal capacity of over 99.9999% against Escherichia coli and is tested for robustness and stability in various extreme environments. This work may shed light on designing novel filter media with versatile functions, meanwhile, the materials can also be used in protective equipment against the new coronavirus.
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Affiliation(s)
- Tong Deng
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Weijin Road 92, Tianjin, 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Weijin Road 92, Tianjin, 300072, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, 300192, China
| | - Yifu Chen
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Weijin Road 92, Tianjin, 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Weijin Road 92, Tianjin, 300072, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, 300192, China
| | - Yanbo Liu
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Weijin Road 92, Tianjin, 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Weijin Road 92, Tianjin, 300072, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, 300192, China
| | - Zeren Shang
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Weijin Road 92, Tianjin, 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Weijin Road 92, Tianjin, 300072, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, 300192, China
| | - Junbo Gong
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Weijin Road 92, Tianjin, 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering, Weijin Road 92, Tianjin, 300072, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, 300192, China
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13
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A Review of the Fabrication Methods, Testing, and Performance of Face Masks. INT J POLYM SCI 2022. [DOI: 10.1155/2022/2161869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Improvement in the performance and compatibility of face masks has remained the focus of researchers in recent years, especially after the emergence of the COVID pandemic. Although a lot of progress in the design, tolerability, and comfort of the mask has been reported, there are certain limitations, requiring further improvement. The present review aims to highlight the filtration efficacy, comfort, and associated characteristic of various types of face masks and respirators as a function of their design and structure. In addition, the air pollutants, their adverse effects on health, certified respirators, and face masks are also discussed. The present review also provides an insight into different types of commercially available face masks in terms of their materials, filtration efficiency, and limitations. The role of emerging trends (such as nanotechnology and high-performance polymers) in the improvement and development of face masks and respirators is also discussed.
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14
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Zhang Z, Wang J, Hu Y, Wang L. Microwaves, a potential treatment for bacteria: A review. Front Microbiol 2022; 13:888266. [PMID: 35958124 PMCID: PMC9358438 DOI: 10.3389/fmicb.2022.888266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 07/05/2022] [Indexed: 02/03/2023] Open
Abstract
Bacteria have brought great harm to the public, especially after the emergence of multidrug-resistant bacteria. This has rendered traditional antibiotic therapy ineffective. In recent years, hyperthermia has offered new treatments to remove bacteria. Microwaves (MW) are a component of the electromagnetic spectrum and can rapidly heat materials. Taking advantage of this characteristic of MW, related studies have shown that both thermal and non-thermal effects of MW can inactivate various bacteria. Even though the understanding of MW in the field of bacteria is not sufficient for widespread use at present, MW has performed well in dealing with microorganisms and controlling infection. This review will focus on the application of MW in bacteria and discuss the advantages, prospects and challenges of using MW in the bacterial field.
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Affiliation(s)
- Zhen Zhang
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants, Xiangya Hospital, Central South University, Changsha, China
| | - Jiahao Wang
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants, Xiangya Hospital, Central South University, Changsha, China
| | - Yihe Hu
- Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants, Xiangya Hospital, Central South University, Changsha, China
- Department of Orthopedics, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Long Wang
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
- Hunan Key Laboratory of Aging Biology, Xiangya Hospital, Central South University, Changsha, China
- *Correspondence: Long Wang,
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15
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Chen Z, Zhang W, Yang H, Min K, Jiang J, Lu D, Huang X, Qu G, Liu Q, Jiang G. A pandemic-induced environmental dilemma of disposable masks: solutions from the perspective of the life cycle. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2022; 24:649-674. [PMID: 35388819 DOI: 10.1039/d1em00509j] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The coronavirus disease 2019 (COVID-19) has swept the world and still afflicts humans. As an effective means of protection, wearing masks has been widely adopted by the general public. The massive use of disposable masks has raised some emerging environmental and bio-safety concerns: improper handling of used masks may transfer the attached pathogens to environmental media; disposable masks mainly consist of polypropylene (PP) fibers which may aggravate the global plastic pollution; and the risks of long-term wearing of masks are elusive. To maximize the utilization and minimize the risks, efforts have been made to improve the performance of masks (e.g., antivirus properties and filtration efficiency), extend their functions (e.g., respiration monitoring and acting as a sampling device), develop new disinfection methods, and recycle masks. Despite that, from the perspective of the life cycle (from production, usage, and discard to disposal), comprehensive solutions are urgently needed to solve the environmental dilemma of disposable masks in both technologies (e.g., efficient use of raw materials, prolonging the service life, and enabling biodegradation) and policies (e.g., stricter industry criteria and garbage sorting).
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Affiliation(s)
- Zigu Chen
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Weican Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Hang Yang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Ke Min
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- Key Laboratory of Phytochemical R&D of Hunan Province, Ministry of Education Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research, Hunan Normal University, Changsha 410081, China
| | - Jie Jiang
- Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China
| | - Dawei Lu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Xiu Huang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Guangbo Qu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Qian Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China
- Institute of Environment and Health, Jianghan University, Wuhan 430056, China
| | - Guibin Jiang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China
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16
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Chen D, Tang L, Wang Y, Tan Y, Fu Y, Cai W, Yu Z, Sun S, Zheng J, Cui J, Wang G, Liu Y, Zhou H. Speaking-Induced Charge-Laden Face Masks with Durable Protectiveness and Wearing Breathability. ACS APPLIED MATERIALS & INTERFACES 2022; 14:17774-17782. [PMID: 35362941 PMCID: PMC8982734 DOI: 10.1021/acsami.2c01077] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 03/22/2022] [Indexed: 05/17/2023]
Abstract
Face masks, which serve as personal protection equipment, have become ubiquitous for combating the ongoing COVID-19. However, conventional electrostatic-based mask filters are disposable and short-term effective with high breathing resistance, causing respiratory ailments and massive consumption (129 billion monthly), intensifying global environmental pollution. In an effort to address these challenges, the introduction of a piezoelectric polymer was adopted to realize the charge-laden melt-blown via the melt-blowing method. The charge-laden melt-blown could be applied to manufacture face masks and to generate charges triggered by mechanical and acoustic energy originated from daily speaking. Through an efficient and scalable industrial melt-blown process, our charge-laden mask is capable of overcoming the inevitable electrostatic attenuation, even in a high-humidity atmosphere by long-wearing (prolonging from 4 to 72 h) and three-cycle common decontamination methods. Combined with outstanding protective properties (PM2.5 filtration efficiency >99.9%), breathability (differential pressure <17 Pa/cm2), and mechanical strength, the resultant charge-laden mask could enable the decreased replacement of masks, thereby lowering to 94.4% of output masks worldwide (∼122 billion monthly) without substituting the existing structure or assembling process.
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Affiliation(s)
- Dan Chen
- State Key Laboratory of Materials Processing and Die
& Mould Technology, School of Materials Science and Engineering, Huazhong
University of Science and Technology, Wuhan 430074,
China
| | - Lianwei Tang
- State Key Laboratory of Materials Processing and Die
& Mould Technology, School of Materials Science and Engineering, Huazhong
University of Science and Technology, Wuhan 430074,
China
| | - Yunming Wang
- State Key Laboratory of Materials Processing and Die
& Mould Technology, School of Materials Science and Engineering, Huazhong
University of Science and Technology, Wuhan 430074,
China
| | - Yongyao Tan
- Department of Ophthalmology, Tongji Hospital, Tongji
Medical College, Huazhong University of Science and Technology,
Wuhan 430074, China
| | - Yue Fu
- State Key Laboratory of Materials Processing and Die
& Mould Technology, School of Materials Science and Engineering, Huazhong
University of Science and Technology, Wuhan 430074,
China
| | - Weihao Cai
- State Key Laboratory of Materials Processing and Die
& Mould Technology, School of Materials Science and Engineering, Huazhong
University of Science and Technology, Wuhan 430074,
China
| | - Zhaohan Yu
- State Key Laboratory of Materials Processing and Die
& Mould Technology, School of Materials Science and Engineering, Huazhong
University of Science and Technology, Wuhan 430074,
China
| | - Shuang Sun
- State Key Laboratory of Materials Processing and Die
& Mould Technology, School of Materials Science and Engineering, Huazhong
University of Science and Technology, Wuhan 430074,
China
| | - Jiaqi Zheng
- State Key Laboratory of Materials Processing and Die
& Mould Technology, School of Materials Science and Engineering, Huazhong
University of Science and Technology, Wuhan 430074,
China
| | - Jingqiang Cui
- Henan Key Laboratory of Medical Polymer
Materials Technology and Application, TuoRen Medical Device Research & Development
Institute Co., Ltd., Health Technology Industry Park Changyuan County,
Changyuan, Henan 453000, China
| | - Guosheng Wang
- Henan Key Laboratory of Medical Polymer
Materials Technology and Application, TuoRen Medical Device Research & Development
Institute Co., Ltd., Health Technology Industry Park Changyuan County,
Changyuan, Henan 453000, China
| | - Yang Liu
- State Key Laboratory of Materials Processing and Die
& Mould Technology, School of Materials Science and Engineering, Huazhong
University of Science and Technology, Wuhan 430074,
China
| | - Huamin Zhou
- State Key Laboratory of Materials Processing and Die
& Mould Technology, School of Materials Science and Engineering, Huazhong
University of Science and Technology, Wuhan 430074,
China
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17
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Boeing C, Sandten C, Hrincius ER, Anhlan D, Dworog A, Hanning S, Kuennemann T, Niehues C, Schupp T, Stec E, Thume J, Triphaus D, Wilkens M, Uphoff H, Zuendorf J, Jacobshagen A, Kreyenschmidt M, Ludwig S, Mertins HC, Mellmann A. Decontamination of disposable respirators for reuse in a pandemic employing in-situ-generated peracetic acid. Am J Infect Control 2022; 50:420-426. [PMID: 34562528 DOI: 10.1016/j.ajic.2021.09.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 09/19/2021] [Accepted: 09/20/2021] [Indexed: 11/01/2022]
Abstract
BACKGROUND During shortages of filtering face pieces (FFP) in a pandemic, it is necessary to implement a method for safe reuse or extended use. Our aim was to develop a simple, inexpensive and ecological method for decontamination of disposable FFPs that preserves filtration efficiency and material integrity. MATERIAL AND METHODS Contamination of FFPs (3M Aura 9320+) with SARS-CoV-2 (1.15 × 104 PFUs), Enterococcus faecium (>106 CFUs), and physiological nasopharyngeal flora was performed prior to decontamination by submersion in a solution of 6 % acetic acid and 6 % hydrogen peroxide (6%AA/6%HP solution) over 30 minutes. Material integrity was assessed by testing the filtering efficiency, loss of fit and employing electron microscopy. RESULTS AND DISCUSSION Decontamination with the 6%AA/6%HP solution resulted in the complete elimination of SARS-CoV-2, E. faecium and physiological nasopharyngeal flora. Material characterization post-treatment showed neither critical material degradation, loss of fit or reduction of filtration efficiency. Electron microscopy revealed no damage to the fibers, and the rubber bands' elasticity was not affected by the decontamination procedure. No concerning residuals of the decontamination procedure were found. CONCLUSION The simple application and widespread availability of 6%AA/6%HP solution for decontaminating disposable FFPs make this solution globally viable, including developing and third world countries.
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18
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Unfolding the effects of decontamination treatments on the structural and functional integrity of N95 respirators via numerical simulations. Sci Rep 2022; 12:4191. [PMID: 35264706 PMCID: PMC8906365 DOI: 10.1038/s41598-022-08150-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 03/03/2022] [Indexed: 11/21/2022] Open
Abstract
Filtering facepiece respirators (FFRs) provide effective protection against diseases spread through airborne infectious droplets and particles. The widespread use of FFRs during the COVID-19 pandemic has not only led to supply shortages, but the disposal of single-use facemasks also threatens the environment with a new kind of plastic pollution. While limited reuse of filtering facepiece respirators has been permitted as a crisis capacity strategy, there are currently no standard test methods available for decontamination before their repeated use. The decontamination of respirators can compromise the structural and functional integrity by reducing the filtration efficiency and breathability. Digital segmentation of X-ray microcomputed tomography (microCT) scans of the meltblown nonwoven layers of a specific N95 respirator model (Venus-4400) after treatment with one and five cycles of liquid hydrogen peroxide, ultraviolet radiation, moist heat, and aqueous soap solution enabled us to perform filtration simulations of decontaminated respirators. The computed filtration efficiencies for 0.3 µm particles agreed well with experimental measurements, and the distribution of particle penetration depths was correlated with the structural changes resulting from decontamination. The combination of X-ray microCT imaging with numerical simulations thus provides a strategy for quantitative evaluation of the effectiveness of decontamination treatments for a specific respirator model.
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19
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Wang QY, Wu ZF, Zhang M, Qin ZJ, Wang L, Zhong FR, Duan HM. Gas-Sensing Properties and Preparation of Waste Mask Fibers/ZnS Composites. JOURNAL OF ELECTRONIC MATERIALS 2022; 51:3843-3850. [PMID: 35497373 PMCID: PMC9040696 DOI: 10.1007/s11664-022-09644-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 04/05/2022] [Indexed: 05/07/2023]
Abstract
UNLABELLED To realize the resource utilization of waste mask fibers (MF), a layer of ZnS nanoparticles was grown on MF by a one-step hydrothermal method, and a MF/ZnS sensor was successfully prepared. This is the first time that resource utilization of MF has been combined with the development of a high-performance gas sensor. The MF/ZnS sensor showed high sensitivity and recoverability to target vapors at room temperature. Compared with ZnS powder loaded on a ceramic substrate, the MF/ZnS composite responses to four analytes have been improved by 8.4~35.2 times. In addition, the time for the MF/ZnS sensor to complete one response-recovery cycle for all four analytes was less than 30 s. This should be attributed to the high gas permeability of the MF substrate, which made the ZnS particles loaded on the MF more fully exposed to contact with the target vapors. This work not only provides a simple and low-cost method to optimize the sensing performance of gas sensors but also provides a new way for the resource utilization of MF. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s11664-022-09644-1.
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Affiliation(s)
- Q. Y. Wang
- Xinjiang Key Laboratory of Solid State Physics and Devices, Urumqi, 830046 Xinjiang China
- School of Physics Science and Technology, Xinjiang University, Urumqi, 830046 Xinjiang China
| | - Z. F. Wu
- Xinjiang Key Laboratory of Solid State Physics and Devices, Urumqi, 830046 Xinjiang China
- School of Physics Science and Technology, Xinjiang University, Urumqi, 830046 Xinjiang China
| | - M. Zhang
- Xinjiang Key Laboratory of Solid State Physics and Devices, Urumqi, 830046 Xinjiang China
- School of Physics Science and Technology, Xinjiang University, Urumqi, 830046 Xinjiang China
| | - Z. J. Qin
- Xinjiang Key Laboratory of Solid State Physics and Devices, Urumqi, 830046 Xinjiang China
- School of Physics Science and Technology, Xinjiang University, Urumqi, 830046 Xinjiang China
| | - L. Wang
- Xinjiang Key Laboratory of Solid State Physics and Devices, Urumqi, 830046 Xinjiang China
- School of Physics Science and Technology, Xinjiang University, Urumqi, 830046 Xinjiang China
| | - F. R. Zhong
- School of Physics and Electronic Science, Zunyi Normal College, Zunyi, 563006 Guizhou People’s Republic of China
| | - H. M. Duan
- Xinjiang Key Laboratory of Solid State Physics and Devices, Urumqi, 830046 Xinjiang China
- School of Physics Science and Technology, Xinjiang University, Urumqi, 830046 Xinjiang China
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20
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Tuñón-Molina A, Takayama K, Redwan EM, Uversky VN, Andrés J, Serrano-Aroca Á. Protective Face Masks: Current Status and Future Trends. ACS APPLIED MATERIALS & INTERFACES 2021; 13:56725-56751. [PMID: 34797624 DOI: 10.1021/acsami.1c12227] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Management of the COVID-19 pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has relied in part on the use of personal protective equipment (PPE). Face masks, as a representative example of PPE, have made a particularly significant contribution. However, most commonly used face masks are made of materials lacking inactivation properties against either SARS-CoV-2 or multidrug-resistant bacteria. Therefore, symptomatic and asymptomatic individuals wearing masks can still infect others due to viable microbial loads escaping from the masks. Moreover, microbial contact transmission can occur by touching the mask, and the discarded masks are an increasing source of contaminated biological waste and a serious environmental threat. For this reason, during the current pandemic, many researchers have worked to develop face masks made of advanced materials with intrinsic antimicrobial, self-cleaning, reusable, and/or biodegradable properties, thereby providing extra protection against pathogens in a sustainable manner. To overview this segment of the remarkable efforts against COVID-19, this review describes the different types of commercialized face masks, their main fabrication methods and treatments, and the progress achieved in face mask development.
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Affiliation(s)
- Alberto Tuñón-Molina
- Biomaterials and Bioengineering Lab, Centro de Investigación Traslacional San Alberto Magno, Universidad Católica de Valencia San Vicente Mártir, c/Guillem de Castro 94, 46001 Valencia, Valencia, Spain
| | - Kazuo Takayama
- Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto 606-8507, Japan
| | - Elrashdy M Redwan
- Faculty of Science, Department of Biological Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Vladimir N Uversky
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida 33612, United States
| | - Juan Andrés
- Department of Physical and Analytical Chemistry, University Jaume I (UJI), 12071 Castellon, Spain
| | - Ángel Serrano-Aroca
- Biomaterials and Bioengineering Lab, Centro de Investigación Traslacional San Alberto Magno, Universidad Católica de Valencia San Vicente Mártir, c/Guillem de Castro 94, 46001 Valencia, Valencia, Spain
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21
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Gogoi P, Singh SK, Pandey A, Chattopadhyay A, Gooh Pattader PS. Nanometer-Thick Superhydrophobic Coating Renders Cloth Mask Potentially Effective against Aerosol-Driven Infections. ACS APPLIED BIO MATERIALS 2021; 4:7921-7931. [PMID: 35006773 PMCID: PMC8525343 DOI: 10.1021/acsabm.1c00851] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Accepted: 09/30/2021] [Indexed: 12/21/2022]
Abstract
The advent of COVID-19 pandemic has made it necessary to wear masks across populations. While the N95 mask offers great performance against airborne infections, its multilayered sealed design makes it difficult to breathe for a longer duration of use. The option of using highly breathable cloth or silk masks especially for a large populace is fraught with the danger of infection. As a normal cloth or silk mask absorbs airborne liquid, it can be a source of plausible infection. We demonstrate the chemical modification of one such mask, Eri silk, to make it hydrophobic (contact angle of water is 143.7°), which reduces the liquid absorption capacity without reducing the breathability of the mask significantly. The breathability reduces only 22% for hydrophobic Eri silk compared to the pristine Eri silk, whereas N95 shows a 59% reduction of breathability. The modified hydrophobic silk can repel the incoming aqueous liquid droplets without wetting the surface. The results indicate that a multilayered modified silk mask to make it hydrophobic can be an affordable and breathable alternative to the N95 mask.
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Affiliation(s)
- Prerona Gogoi
- Department of Chemical Engineering,
Indian Institute of Technology Guwahati, Guwahati, Assam
781039, India
| | - Sunil Kumar Singh
- Department of Chemical Engineering,
Indian Institute of Technology Guwahati, Guwahati, Assam
781039, India
| | - Ankur Pandey
- Department of Chemical Engineering,
Indian Institute of Technology Guwahati, Guwahati, Assam
781039, India
| | - Arun Chattopadhyay
- Department of Chemistry, Indian Institute
of Technology Guwahati, Guwahati, Assam 781039,
India
- Centre for Nanotechnology, Indian Institute
of Technology Guwahati, Guwahati, Assam 781039,
India
| | - Partho Sarathi Gooh Pattader
- Department of Chemical Engineering,
Indian Institute of Technology Guwahati, Guwahati, Assam
781039, India
- Centre for Nanotechnology, Indian Institute
of Technology Guwahati, Guwahati, Assam 781039,
India
- School of Health Science and Technology,
Indian Institute of Technology Guwahati, Guwahati, Assam
781039, India
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22
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Varghese H, Chandran A. Triboelectric Nanogenerator from Used Surgical Face Mask and Waste Mylar Materials Aiding the Circular Economy. ACS APPLIED MATERIALS & INTERFACES 2021; 13:51132-51140. [PMID: 34672531 DOI: 10.1021/acsami.1c16557] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Apart from claiming the lives of more than 3.2 million people, the COVID-19 pandemic is worsening the global plastic pollution every day, mainly with the overflux of single-use polypropylene (PP) face masks. In this scenario, as an innovative solution to mitigate plastic pollution as well as to meet the rising electrical energy demand, we are introducing an all-flexible and facile waste material-based triboelectric nanogenerator (WM-TENG), aiding toward the circular economy. The WM-TENG operating in contact separation mode is fabricated using the PP from a used face mask in combination with recovered Mylar sheets from solid wastes as triboelectric contact layers and a flexible supporting structure. After detailed investigation and trials to study the effect of various disinfection mechanisms of PP materials on the energy output of WM-TENG, UV-C radiation is selected for disinfecting the used masks owing to the retention of electrical energy output. Under a tapping force of 3 N, the WM-TENG having an active area of 6 cm2 delivers an open-circuit voltage of 200 V and a short-circuit current density of 0.29 mA/m2, respectively. The WM-TENG also delivered a maximum power density of 71.16 mW/m2 under 108 Ω load. Additionally, the WM-TENG is demonstrated for powering electronic gadgets such as a calculator, digital thermometer, and LCD clock. This flexible and low-cost nanogenerator without any complex fabrication steps is a sustainable solution for the alarming plastic pollution as well as the rising energy demands.
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Affiliation(s)
- Harris Varghese
- Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Achu Chandran
- Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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23
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Lee J, Jung S, Park H, Kim J. Bifunctional ZIF-8 Grown Webs for Advanced Filtration of Particulate and Gaseous Matters: Effect of Charging Process on the Electrostatic Capture of Nanoparticles and Sulfur Dioxide. ACS APPLIED MATERIALS & INTERFACES 2021; 13:50401-50410. [PMID: 34637264 DOI: 10.1021/acsami.1c15734] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Metal-organic framework (MOF), an emerging class of porous hybrid inorganic-organic crystals, has been applied for various environmental remediation strategies including liquid and air filtration. In this study, the role of the zeolite imidazole framework-8 (ZIF-8) was explored on the charge trapping ability and its contribution to capturing the targeted pollutants of NaCl nanoparticles and SO2 gas. Poly(lactic acid) fibers with controlled surface pores were electrospun using water vapor-induced phase separation, and the fiber surface was uniformly coated with ZIF-8 crystals via an in situ growth method. As a novel process approach, the corona charging process was applied to the ZIF-8 grown webs. The ZIF-8 promoted the charge trapping in the corona process, and the charged ZIF-8 web showed a significantly improved electrostatic filtration efficiency. Also, the charged ZIF-8 web showed an enhanced SO2 capture ability, both in the static and dynamic air flow states, demonstrating the applicability as a bifunctional filter for both particulate and gaseous matters. The approach of this study is novel in that both particulate and gas capture capabilities were associated with the charge trapping ability of ZIF-8, implementing the corona charging process to the ZIF-8 webs.
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Affiliation(s)
- Jinwook Lee
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Republic of Korea
| | - Seojin Jung
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Republic of Korea
| | - Hanjou Park
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Republic of Korea
| | - Jooyoun Kim
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Republic of Korea
- Research Institute of Human Ecology, Seoul National University, Seoul 08826, Republic of Korea
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24
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Quantitative modeling of the impact of facemasks and associated leakage on the airborne transmission of SARS-CoV-2. Sci Rep 2021; 11:19403. [PMID: 34593891 PMCID: PMC8484595 DOI: 10.1038/s41598-021-98895-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Accepted: 09/16/2021] [Indexed: 12/28/2022] Open
Abstract
The ongoing worldwide outbreak of COVID-19 has set personal protective equipment in the spotlight. A significant number of countries impose the use of facemasks in public spaces and encourage it in the private sphere. Even in countries where relatively high vaccination rates are achieved at present, breakthrough infections have been frequently reported and usage of facemasks in certain settings has been recommended again. Alternative solutions, including community masks fabricated using various materials, such as cotton or jersey, have emerged alongside facemasks following long-established standards (e.g., EN 149, EN 14683). In the present work, we present a computational model to calculate the ability of different types of facemasks to reduce the exposure to virus-laden respiratory particles, with a focus on the relative importance of the filtration properties and the fitting on the wearer’s face. The model considers the facemask and the associated leakage, the transport of respiratory particles and their accumulation around the emitter, as well as the fraction of the inhaled particles deposited in the respiratory system. Different levels of leakages are considered to represent the diversity of fittings likely to be found among a population of non-trained users. The leakage prevails over the filtration performance of a facemask in determining the exposure level, and the ability of a face protection to limit leakages needs to be taken into account to accurately estimate the provided protection. Filtering facepieces (FFP) provide a better protection efficiency than surgical and community masks due to their higher filtration efficiency and their ability to provide a better fit and thus reduce the leakages. However, an improperly-fitted FFP mask loses a critical fraction of its protection efficiency, which may drop below the protection level provided by properly-worn surgical and community masks.
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25
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van Straten B, Ligtelijn S, Droog L, Putman E, Dankelman J, Weiland NHS, Horeman T. A life cycle assessment of reprocessing face masks during the Covid-19 pandemic. Sci Rep 2021; 11:17680. [PMID: 34480045 PMCID: PMC8417283 DOI: 10.1038/s41598-021-97188-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 08/23/2021] [Indexed: 11/08/2022] Open
Abstract
The Covid-19 pandemic led to threatening shortages in healthcare of medical products such as face masks. Due to this major impact on our healthcare society an initiative was conducted between March and July 2020 for reprocessing of face masks from 19 different hospitals. This exceptional opportunity was used to study the costs impact and the carbon footprint of reprocessed face masks relative to new disposable face masks. The aim of this study is to conduct a Life Cycle Assessment (LCA) to assess and compare the climate change impact of disposed versus reprocessed face masks. In total 18.166 high quality medical FFP2 face masks were reprocessed through steam sterilization between March and July 2020. Greenhouse gas emissions during production, transport, sterilization and end-of-life processes were assessed. The background life cycle inventory data were retrieved from the ecoinvent database. The life cycle impact assessment method ReCiPe was used to translate emissions into climate change impact. The cost analysis is based on actual sterilization as well as associated costs compared to the prices of new disposable face masks. A Monte Carlo sampling was used to propagate the uncertainty of different inputs to the LCA results. The carbon footprint appears to be 58% lower for face masks which were reused for five times compared to new face masks which were used for one time only. The sensitivity analysis indicated that the loading capacity of the autoclave and rejection rate of face masks has a large influence on the carbon footprint. The estimated cost price of a reprocessed mask was €1.40 against €1.55. The Life Cycle Assessment demonstrates that reprocessed FFP2 face masks from a circular economy perspective have a lower climate change impact on the carbon footprint than new face masks. For policymakers it is important to realize that the carbon footprint of medical products such as face masks may be reduced by means of circular economy strategies. This study demonstrated a lower climate change impact and lower costs when reprocessing and reusing disposable face masks for five times. Therefore, this study may serve as an inspiration for investigating reprocessing of other medical products that may become scarce. Finally, this study advocates that circular design engineering principles should be taken into account when designing medical devices. This will lead to more sustainable products that have a lower carbon footprint and may be manufactured at lower costs.
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Affiliation(s)
- Bart van Straten
- Department of BioMechanical Engineering, Delft University of Technology, Mekelweg 2, Building 34, 2628 CD, Delft, The Netherlands.
| | - S Ligtelijn
- Department of BioMechanical Engineering, Delft University of Technology, Mekelweg 2, Building 34, 2628 CD, Delft, The Netherlands
| | - L Droog
- Industrial Ecology, Delft University of Technology and Leiden University, Delft, The Netherlands
| | - E Putman
- VWS, Ministry of Health, Welfare and Sport (VWS), The Hague, The Netherlands
| | - J Dankelman
- Department of BioMechanical Engineering, Delft University of Technology, Mekelweg 2, Building 34, 2628 CD, Delft, The Netherlands
| | | | - T Horeman
- Department of BioMechanical Engineering, Delft University of Technology, Mekelweg 2, Building 34, 2628 CD, Delft, The Netherlands
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26
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Wang CG, Li Z, Liu S, Ng CT, Marzuki M, Jeslyn Wong PS, Tan B, Lee A, Hui Lim CF, Bifani P, Fang Z, Ching Wong JC, Setoh YX, Yang YY, Mun CH, Fiona Phua SZ, Lim WQ, Lin L, Cook AR, Tanoto H, Ng LC, Singhal A, Leong YW, Loh XJ. N95 respirator decontamination: a study in reusability. MATERIALS TODAY. ADVANCES 2021; 11:100148. [PMID: 34179746 PMCID: PMC8220445 DOI: 10.1016/j.mtadv.2021.100148] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 04/20/2021] [Accepted: 04/21/2021] [Indexed: 05/23/2023]
Abstract
The coronavirus disease 2019 (COVID-19) pandemic had caused a severe depletion of the worldwide supply of N95 respirators. The development of methods to effectively decontaminate N95 respirators while maintaining their integrity is crucial for respirator regeneration and reuse. In this study, we systematically evaluated five respirator decontamination methods using vaporized hydrogen peroxide (VHP) or ultraviolet (254 nm wavelength, UVC) radiation. Through testing the bioburden, filtration, fluid resistance, and fit (shape) of the decontaminated respirators, we found that the decontamination methods using BioQuell VHP, custom VHP container, Steris VHP, and Sterrad VHP effectively inactivated Cardiovirus (3-log10 reduction) and bacteria (6-log10 reduction) without compromising the respirator integrity after 2-15 cycles. Hope UVC system was capable of inactivating Cardiovirus (3-log10 reduction) but exhibited relatively poorer bactericidal activity. These methods are capable of decontaminating 10-1000 respirators per batch with varied decontamination times (10-200 min). Our findings show that N95 respirators treated by the previously mentioned decontamination methods are safe and effective for reuse by industry, laboratories, and hospitals.
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Affiliation(s)
- C-G Wang
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A∗STAR), 2 Fusionopolis Way, Innovis, No. 08-03, 138634, Singapore
| | - Z Li
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A∗STAR), 2 Fusionopolis Way, Innovis, No. 08-03, 138634, Singapore
| | - S Liu
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A∗STAR), 2 Fusionopolis Way, Innovis, No. 08-03, 138634, Singapore
| | - C T Ng
- Environmental Health Institute, National Environment Agency (NEA), 11 Biopolis Way No.06-05/08 Helios Block, 138667, Singapore
| | - M Marzuki
- A∗STAR Infectious Diseases Labs, Agency for Science, Technology and Research (A∗STAR), 8A Biomedical Grove, 138648, Singapore
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A∗STAR), 8A Biomedical Grove, 138648, Singapore
| | - P S Jeslyn Wong
- Environmental Health Institute, National Environment Agency (NEA), 11 Biopolis Way No.06-05/08 Helios Block, 138667, Singapore
| | - B Tan
- A∗STAR Infectious Diseases Labs, Agency for Science, Technology and Research (A∗STAR), 8A Biomedical Grove, 138648, Singapore
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A∗STAR), 8A Biomedical Grove, 138648, Singapore
| | - A Lee
- A∗STAR Infectious Diseases Labs, Agency for Science, Technology and Research (A∗STAR), 8A Biomedical Grove, 138648, Singapore
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A∗STAR), 8A Biomedical Grove, 138648, Singapore
| | - C F Hui Lim
- A∗STAR Infectious Diseases Labs, Agency for Science, Technology and Research (A∗STAR), 8A Biomedical Grove, 138648, Singapore
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A∗STAR), 8A Biomedical Grove, 138648, Singapore
| | - P Bifani
- A∗STAR Infectious Diseases Labs, Agency for Science, Technology and Research (A∗STAR), 8A Biomedical Grove, 138648, Singapore
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A∗STAR), 8A Biomedical Grove, 138648, Singapore
| | - Z Fang
- Environmental Health Institute, National Environment Agency (NEA), 11 Biopolis Way No.06-05/08 Helios Block, 138667, Singapore
| | - J C Ching Wong
- Environmental Health Institute, National Environment Agency (NEA), 11 Biopolis Way No.06-05/08 Helios Block, 138667, Singapore
| | - Y X Setoh
- Environmental Health Institute, National Environment Agency (NEA), 11 Biopolis Way No.06-05/08 Helios Block, 138667, Singapore
| | - Y Y Yang
- Institute of Bioengineering and Bioimaging, Agency for Science, Technology and Research (A∗STAR), 31 Biopolis Way, Nanos, 138669, Singapore
| | - C H Mun
- DSO National Laboratories, 12 Science Park Dr, 118225, Singapore
| | - S Z Fiona Phua
- DSO National Laboratories, 12 Science Park Dr, 118225, Singapore
| | - W Q Lim
- DSO National Laboratories, 12 Science Park Dr, 118225, Singapore
| | - L Lin
- ST Engineering Aerospace Engines Pte Ltd, 501 Airport Rd, 539931, Singapore
| | - A R Cook
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, 12 Science Drive 2, 117549, Singapore
| | - H Tanoto
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A∗STAR), 2 Fusionopolis Way, Innovis, No. 08-03, 138634, Singapore
| | - L-C Ng
- Environmental Health Institute, National Environment Agency (NEA), 11 Biopolis Way No.06-05/08 Helios Block, 138667, Singapore
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, 637551, Singapore
| | - A Singhal
- A∗STAR Infectious Diseases Labs, Agency for Science, Technology and Research (A∗STAR), 8A Biomedical Grove, 138648, Singapore
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A∗STAR), 8A Biomedical Grove, 138648, Singapore
| | - Y W Leong
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A∗STAR), 2 Fusionopolis Way, Innovis, No. 08-03, 138634, Singapore
| | - X J Loh
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A∗STAR), 2 Fusionopolis Way, Innovis, No. 08-03, 138634, Singapore
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27
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He W, Guo Y, Liu J, Yue Y, Wang J. Filtration Performance Degradation of In-Use Masks by Vapors from Alcohol-Based Hand Sanitizers and the Mitigation Solutions. GLOBAL CHALLENGES (HOBOKEN, NJ) 2021; 5:2100015. [PMID: 34497717 PMCID: PMC8414512 DOI: 10.1002/gch2.202100015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 06/07/2021] [Indexed: 06/13/2023]
Abstract
In the current COVID-19 pandemic, wearing masks and hand disinfection are widely adopted hygiene practices. Alcohol-based sanitizers are commonly used for hand disinfection, however, the alcohol vapors can dissipate the charges on electrostatic filters. In the present study, the effects of alcohol vapors from alcohol-based sanitizers during hand disinfection on the in-use masks are studied. The results show that the negative effects are not significant for nonelectrostatic cotton masks or N95 respirators with multiple charged layers, but noticeable for surgical masks. After five rounds of hand disinfection, the filtration efficiencies of the filtering materials of the surgical masks decrease by more than 8% for 400 and 500 nm particles and by 3.7 ± 1.8% for 1 µm particles, the effective filtration efficiency of the surgical masks worn by the volunteers (with leakage considered) decreases by about 5% for ambient aerosol. In another process to imitate intensive disinfection procedures by healthcare workers, a 30 min surface cleaning process using alcohol-based sanitizer is performed, and the effective efficiency of the N95 respirators worn by the volunteers decreases by nearly 9%. The simple practice of avoiding vapor during hand disinfection could mitigate the effects of alcohol vapor, which is demonstrated on two brands of surgical masks.
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Affiliation(s)
- Weidong He
- Filter Test Center Northeastern University Shenyang Liaoning CN-110819 China
- Institute of Environmental Engineering ETH Zürich Zürich CH-8093 Switzerland
- Lab of Advanced Analytical Technologies Empa Dübendorf CH-8600 Switzerland
| | - Yinghe Guo
- Filter Test Center Northeastern University Shenyang Liaoning CN-110819 China
- Institute of Environmental Engineering ETH Zürich Zürich CH-8093 Switzerland
- Lab of Advanced Analytical Technologies Empa Dübendorf CH-8600 Switzerland
| | - Jingxian Liu
- Filter Test Center Northeastern University Shenyang Liaoning CN-110819 China
| | - Yang Yue
- Institute of Environmental Engineering ETH Zürich Zürich CH-8093 Switzerland
- Lab of Advanced Analytical Technologies Empa Dübendorf CH-8600 Switzerland
| | - Jing Wang
- Institute of Environmental Engineering ETH Zürich Zürich CH-8093 Switzerland
- Lab of Advanced Analytical Technologies Empa Dübendorf CH-8600 Switzerland
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28
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Kasbe PS, Gade H, Liu S, Chase GG, Xu W. Ultrathin Polydopamine-Graphene Oxide Hybrid Coatings on Polymer Filters with Improved Filtration Performance and Functionalities. ACS APPLIED BIO MATERIALS 2021; 4:5180-5188. [PMID: 35007001 DOI: 10.1021/acsabm.1c00367] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Thin polymer fiber mats, in particular those made of nonwoven polypropylene (PP) fibers, are extensively used for medical and industrial filtration. The recent pandemic has increased the demand for the fabrication of protective masks. The nonwoven PP filter has limitations in filtration efficiency and lacks advanced functionalities. Here, we propose a simple, effective, and low-cost method to functionalize PP filters and endow antimicrobial and photothermal properties. Our approach is based on the deposition of an ultrathin hybrid coating composed of graphene oxide (GO) and polydopamine on the surface of PP filters by spray-coating. The complementary properties and synergic effects of GO and polydopamine in the ultrathin coating improved the filtration efficiency of the PP filter by 20% with little change in pressure drop. Single component coatings did not result in similar improvements in performance. The ultrathin coating also makes the surface of the filter more hydrophilic with negative charges. The photothermal property of GO enables a rapid temperature increase of the surface-coated filter upon light irradiation for easy sterilization. Furthermore, cationic polymer brushes can be grafted to the ultrathin hybrid coating, which adds the highly desired antimicrobial property to the PP filters for their more effective protection against microorganisms.
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Affiliation(s)
- Pratik S Kasbe
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, United States
| | - Harshal Gade
- Department of Chemical, Biomolecular, and Corrosion Engineering, University of Akron, Akron, Ohio 44325, United States
| | - Shan Liu
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, United States
| | - George G Chase
- Department of Chemical, Biomolecular, and Corrosion Engineering, University of Akron, Akron, Ohio 44325, United States
| | - Weinan Xu
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, United States
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29
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Ogbuoji EA, Zaky AM, Escobar IC. Advanced Research and Development of Face Masks and Respirators Pre and Post the Coronavirus Disease 2019 (COVID-19) Pandemic: A Critical Review. Polymers (Basel) 2021; 13:1998. [PMID: 34207184 PMCID: PMC8235328 DOI: 10.3390/polym13121998] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/11/2021] [Accepted: 06/11/2021] [Indexed: 12/05/2022] Open
Abstract
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.
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Affiliation(s)
- Ebuka A. Ogbuoji
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA;
| | - Amr M. Zaky
- BioMicrobics Inc., 16002 West 110th Street, Lenexa, KS 66219, USA;
| | - Isabel C. Escobar
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA;
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30
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Karmacharya M, Kumar S, Gulenko O, Cho YK. Advances in Facemasks during the COVID-19 Pandemic Era. ACS APPLIED BIO MATERIALS 2021; 4:3891-3908. [PMID: 35006814 PMCID: PMC7839420 DOI: 10.1021/acsabm.0c01329] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 01/04/2021] [Indexed: 12/17/2022]
Abstract
The outbreak of coronavirus disease (COVID-19) has transformed the daily lifestyles of people worldwide. COVID-19 was characterized as a pandemic owing to its global spread, and technologies based on engineered materials that help to reduce the spread of infections have been reported. Nanotechnology present in materials with enhanced physicochemical properties and versatile chemical functionalization offer numerous ways to combat the disease. Facemasks are a reliable preventive measure, although they are not 100% effective against viral infections. Nonwoven materials, which are the key components of masks, act as barriers to the virus through filtration. However, there is a high chance of cross-infection because the used mask lacks virucidal properties and can become an additional source of infection. The combination of antiviral and filtration properties enhances the durability and reliability of masks, thereby reducing the likelihood of cross-infection. In this review, we focus on masks, from the manufacturing stage to practical applications, and their abilities to combat COVID-19. Herein, we discuss the impacts of masks on the environment, while considering safe industrial production in the future. Furthermore, we discuss available options for future research directions that do not negatively impact the environment.
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Affiliation(s)
- Mamata Karmacharya
- Center for Soft and Living Matter,
Institute for Basic Science (IBS), UNIST-gil 50, Ulsan 44919,
Republic of Korea
- Department of Chemical Engineering, Ulsan
National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan
44919, Republic of Korea
| | - Sumit Kumar
- Center for Soft and Living Matter,
Institute for Basic Science (IBS), UNIST-gil 50, Ulsan 44919,
Republic of Korea
- Department of Biomedical Engineering, Ulsan
National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan
44919, Republic of Korea
| | - Oleksandra Gulenko
- Center for Soft and Living Matter,
Institute for Basic Science (IBS), UNIST-gil 50, Ulsan 44919,
Republic of Korea
- Department of Biomedical Engineering, Ulsan
National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan
44919, Republic of Korea
| | - Yoon-Kyoung Cho
- Center for Soft and Living Matter,
Institute for Basic Science (IBS), UNIST-gil 50, Ulsan 44919,
Republic of Korea
- Department of Biomedical Engineering, Ulsan
National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan
44919, Republic of Korea
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31
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Nicolau T, Filho NG, Zille A. Ultraviolet-C as a Viable Reprocessing Method for Disposable Masks and Filtering Facepiece Respirators. Polymers (Basel) 2021; 13:801. [PMID: 33807909 PMCID: PMC7961913 DOI: 10.3390/polym13050801] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 02/27/2021] [Accepted: 03/01/2021] [Indexed: 01/02/2023] Open
Abstract
In normal conditions, discarding single-use personal protective equipment after use is the rule for its users due to the possibility of being infected, particularly for masks and filtering facepiece respirators. When the demand for these protective tools is not satisfied by the companies supplying them, a scenario of shortages occurs, and new strategies must arise. One possible approach regards the disinfection of these pieces of equipment, but there are multiple methods. Analyzing these methods, Ultraviolet-C (UV-C) becomes an exciting option, given its germicidal capability. This paper aims to describe the state-of-the-art for UV-C sterilization in masks and filtering facepiece respirators. To achieve this goal, we adopted a systematic literature review in multiple databases added to a snowball method to make our sample as robust as possible and encompass a more significant number of studies. We found that UV-C's germicidal capability is just as good as other sterilization methods. Combining this characteristic with other advantages makes UV-C sterilization desirable compared to other methods, despite its possible disadvantages.
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Affiliation(s)
- Talita Nicolau
- 2C2T—Centre for Textile Science and Technology, University of Minho, 4800-058 Guimarães, Portugal;
| | - Núbio Gomes Filho
- School of Economics and Management, University of Minho, 4710-57 Braga, Portugal;
| | - Andrea Zille
- 2C2T—Centre for Textile Science and Technology, University of Minho, 4800-058 Guimarães, Portugal;
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32
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Wang PL, Roschli A, Paranthaman MP, Theodore M, Cramer CL, Zangmeister C, Zhang Y, Urban JJ, Love L. Recent developments in filtration media and respirator technology in response to COVID-19. MRS BULLETIN 2021; 46:822-831. [PMID: 34539059 PMCID: PMC8442655 DOI: 10.1557/s43577-021-00173-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/06/2021] [Indexed: 05/03/2023]
Abstract
ABSTRACT The COVID-19 pandemic triggered a surge in demand for N95 or equivalent respirators that the global supply chain was unable to satisfy. This shortage in critical equipment has inspired research that addresses the immediate problems and has accelerated the development of the next-generation filtration media and respirators. This article provides a brief review of the most recent work with regard to face respirators and filtration media. We discuss filtration efficiency of the widely utilized cloth masks. Next, the sterilization of and reuse of existing N95 respirators to extend the existing stockpile is discussed. To expand near-term supplies, optimization of current manufacturing methods, such as melt-blown processes and electrospinning, has been explored. Future manufacturing methods have been investigated to address long-term supply shortages. Novel materials with antiviral and sterilizable properties with the ability for multiple reuses have been developed and will contribute to the development of the next generation of longer lasting multi-use N95 respirators. Finally, additively manufactured respirators are reviewed, which enable a rapidly deployable source of reusable respirators that can use any filtration fabric.
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Affiliation(s)
| | - Alex Roschli
- Oak Ridge National Laboratory, Oak Ridge, TN USA
| | | | | | | | | | | | | | - Lonnie Love
- Oak Ridge National Laboratory, Oak Ridge, TN USA
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33
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Jung S, Hemmatian T, Song E, Lee K, Seo D, Yi J, Kim J. Disinfection Treatments of Disposable Respirators Influencing the Bactericidal/Bacteria Removal Efficiency, Filtration Performance, and Structural Integrity. Polymers (Basel) 2020; 13:E45. [PMID: 33374397 PMCID: PMC7796291 DOI: 10.3390/polym13010045] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 12/19/2020] [Accepted: 12/21/2020] [Indexed: 12/31/2022] Open
Abstract
In the outbreak of COVID-19, the extended wear of single-use, disposable respirators was inevitable due to limited supplies. As a respirator is front-line protection against particulate matter, including bioaerosol and droplets, a comprehensive understanding for the reuse strategy is needed. In this study, eight different disinfection methods commonly applied for the reuse of respirators were compared for their influence on the filtration and bactericidal/bacteria removal performance, with in-depth discussion on the cause of effects. Treatments including oven-dry, ultraviolet irradiation (UV), microwaving, laundering with and without detergent, and immersion in hypochlorite, isopropanol, and ethanol were performed to respirators. Immersion in ethanol or isopropanol was effective for inactivation and removal of bacteria, yet such a treatment significantly deteriorated the filtration efficiency in about 20-28%, dissipating the surface charges. Laundering, while effective in removing the attached bacteria, triggered physical damage, leading to a possible reduction of filtration performance. A short-term oven-dry, UV irradiation, and microwaving mostly preserved the filtration performance, yet the drawback lied in the incomplete bactericidal efficiency. This study would contribute to the public health and safety by providing scientific background on the effect of disinfection treatment methods for respirators.
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Affiliation(s)
- Seojin Jung
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Korea; (S.J.); (T.H.); (E.S.); (K.L.); (J.Y.)
| | - Tahmineh Hemmatian
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Korea; (S.J.); (T.H.); (E.S.); (K.L.); (J.Y.)
| | - Eugene Song
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Korea; (S.J.); (T.H.); (E.S.); (K.L.); (J.Y.)
| | - Kyeongeun Lee
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Korea; (S.J.); (T.H.); (E.S.); (K.L.); (J.Y.)
- Reliability Assessment Center, FITI Testing & Research Institute, Seoul 07791, Korea;
| | - Dongwan Seo
- Reliability Assessment Center, FITI Testing & Research Institute, Seoul 07791, Korea;
| | - Jehyung Yi
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Korea; (S.J.); (T.H.); (E.S.); (K.L.); (J.Y.)
| | - Jooyoun Kim
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Korea; (S.J.); (T.H.); (E.S.); (K.L.); (J.Y.)
- Research Institute of Human Ecology, Seoul National University, Seoul 08826, Korea
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