Electrospun antibacterial and antiviral poly(ε-caprolactone)/zein/Ag bead-on-string membranes and its application in air filtration

Liu, Yaowen; Li, Siying; Lan, Wenting; Hossen, Alomgir; Qin, Wen; Lee, Kangju

doi:10.1016/j.mtadv.2021.100173

Cited by 27 publications

(19 citation statements)

References 49 publications

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“…To date, biodegradable natural polymers have been widely recommended as alternative materials for making packaging films (Li et al 2020 ), filtration membranes (Ahne et al 2019 ; Liu et al 2021a ; Patil et al 2021 ; Ukkola et al 2021 ; Xiong et al 2021 ), and, in the medical sector (Afshar et al 2019 ; Dodero et al 2020 ; Venkatesan et al 2017 ), for tissue engineering, promoting sustainable solutions. For example, since 2020, with the urgency of the COVID-19 pandemic, several sources of biopolymers, such as cellulose, alginate, poly(lactic acid) (PLA), gelatine, chitosan, chitin, poly(vinyl alcohol) (PVA), polyhydroxyalkanoates (PHA) and their mixtures are frequently used in the manufacture of filter membranes and face masks as viable and sustainable solutions (Essa et al 2021 ; Li et al 2018 ; Liu et al 2021a , b ; Xie et al 2021 ), as shown in Table 3 . The fibre diameter, porosity and filtration efficiency of the electrospun filter membrane are the result of the electrospinning (Santos et al 2019 ).…”

Section: Biodegradable Air Filter Media For Facemasksmentioning

confidence: 99%

“…Several studies have been performed on the development of a novel technology to improve the commercial availability and reduce the environmental concerns of the face mask and FFRs using filter membrane from cellulose-based materials produced via electrospinning technique (Bortolassi et al 2019 ; Naragund and Panda 2020 ; Santos et al 2020 ; Wibisono et al 2020 ; Xie et al 2021 ) and freeze-drying method (Liu et al 2021a , b ; Lu et al 2018 ; Sim and Youn 2016 ; Ukkola et al 2021 ; Xiong et al 2021 ). Nanocellulose-based filter membranes are potential materials for trapping air pollutants due to their biocompatibility, high specific surface area, renewable nature, biodegradability, worldwide availability and ease of functionalization (Liu et al 2021a , b ; Ukkola et al 2021 ). In addition, fibrous filters made of cellulose nanofibrils (CNF) are very effective in removing particulate matter from the air; however, their use remains a challenge due to the lack of studies evaluating moisture resistance treatment, mechanical behaviour as well as filtration performance (Bortolassi et al 2019 ).…”

Section: Introductionmentioning

confidence: 99%

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Nanocellulose-based membrane as a potential material for high performance biodegradable aerosol respirators for SARS-CoV-2 prevention: a review

Stanislas

Bilba²,

Santos

et al. 2022

Cellulose

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The controversy surrounding the transmission of COVID-19 in 2020 has revealed the need to better understand the airborne transmission route of respiratory viruses to establish appropriate strategies to limit their transmission. The effectiveness in protecting against COVID-19 has led to a high demand for face masks. This includes the single-use of non-degradable masks and Filtering Facepiece Respirators by a large proportion of the public, leading to environmental concerns related to waste management. Thus, nanocellulose-based membranes are a promising environmental solution for aerosol filtration due to their biodegradability, renewability, biocompatibility, high specific surface area, non-toxicity, ease of functionalization and worldwide availability. Although the technology for producing high-performance aerosol filter membranes from cellulose-based materials is still in its initial stage, several promising results show the prospects of the use of this kind of materials. This review focuses on the overview of nanocellulose-based filter media, including its processing, desirable characteristics and recent developments regarding filtration, functionalization, biodegradability, and mechanical behavior. The porosity control, surface wettability and surface functional groups resulting from the silylation treatment to improve the filtration capacity of the nanocellulose-based membrane is discussed. Future research trends in this area are planned to develop the air filter media by reinforcing the filter membrane structure of CNF with CNCs. In addition, the integration of sol–gel technology into the production of an air filter can tailor the pore size of the membrane for a viable physical screening solution in future studies. Graphical abstract

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Section: Biodegradable Air Filter Media For Facemasksmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nanocellulose-based membrane as a potential material for high performance biodegradable aerosol respirators for SARS-CoV-2 prevention: a review

Stanislas

Bilba²,

Santos

et al. 2022

Cellulose

View full text Add to dashboard Cite

show abstract

“…Indeed, at present, a large volume of polypropylene facemasks (that should be considered a biohazard) are disposed of every day, while they are not capable of stopping the spreading of the virus. At the same time, the scientific community has already started looking for materials for facemasks with a high degree of protection, as summarized in several works [3,18,[27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Biodegradable Nanohybrid Materials as Candidates for Self-Sanitizing Filters Aimed at Protection from SARS-CoV-2 in Public Areas

et al. 2022

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The COVID-19 pandemic has raised the problem of efficient, low-cost materials enabling the effective protection of people from viruses transmitted through the air or via surfaces. Nanofibers can be a great candidate for efficient air filtration due to their structure, although they cannot protect from viruses. In this work, we prepared a wide range of nanofibrous biodegradable samples containing Ag (up to 0.6 at.%) and Cu (up to 20.4 at.%) exhibiting various wettability. By adjusting the magnetron current (0.3 A) and implanter voltage (5 kV), the deposition of TiO2 and Ag+ implantation into PCL/PEO nanofibers was optimized in order to achieve implantation of Ag+ without damaging the nanofibrous structure of the PCL/PEO. The optimal conditions to implant silver were achieved for the PCL-Ti0.3-Ag-5kV sample. The coating of PCL nanofibers by a Cu layer was successfully realized by magnetron sputtering. The antiviral activity evaluated by widely used methodology involving the cultivation of VeroE6 cells was the highest for PCL-Cu and PCL-COOH, where the VeroE6 viability was 73.1 and 68.1%, respectively, which is significantly higher compared to SARS-CoV-2 samples without self-sanitizing (42.8%). Interestingly, the samples with implanted silver and TiO2 exhibited no antiviral effect. This difference between Cu and Ag containing nanofibers might be related to the different concentrations of ions released from the samples: 80 μg/L/day for Cu2+ versus 15 µg/L/day for Ag+. The high antiviral activity of PCL-Cu opens up an exciting opportunity to prepare low-cost self-sanitizing surfaces for anti-SARS-CoV-2 protection and can be essential for air filtration application and facemasks. The rough cost estimation for the production of a biodegradable nanohybrid PCL-Cu facemask revealed ~$0.28/piece, and the business case for the production of these facemasks would be highly positive, with an Internal Rate of Return of 34%.

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“…In recent years, filters are pervasively made using the melt blowing or spunbond techniques, and thus nanofibers have drawn much attention from diverse fields. Owing to the unique advantages, e.g., a small fiber diameter, a large specific surface area, and a low pressure drop [30][31][32][33], nanofibers are a feasible material for filters [24,[34][35][36][37]. Electrospinning is effective for transforming materials into ultrafine fibers, and the related techniques are similar to other techniques in current industry, producing micro-sized fibers, including melt spinning, wet spinning, dry spinning, and gel spinning [38].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Needleless Electrospinning Polyvinyl Alcohol/Water-Soluble Chitosan Nanofibrous Membranes: Antibacterial Property and Filter Efficiency

et al. 2022

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Electrospinning is an efficient method of producing nanofibers out of polymers that shows a great potential for the filtration territory. Featuring water-soluble chitosan (WS-CS), a low-pollution process and a self-made needleless machine, PVA/WS-CS nanofibrous membranes were prepared and evaluated for nanofiber diameter, bacteriostatic property, filtration efficiency, pressure drop, and quality factor. Test results indicate that the minimal fiber diameter was 216.58 ± 58.15 nm. Regardless of the WS-CS concentration, all of the PVA/WS-CS nanofibrous membranes attained a high porosity and a high water vapor transmission rate (WVTR), with a pore size of 12.06–22.48 nm. Moreover, the membranes also exhibit bacteriostatic efficacy against Staphylococcus aureus, an optimal quality factor of 0.0825 Pa−1, and a filtration efficiency as high as 97.0%, that is 72.5% higher than that of common masks.

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Electrospun antibacterial and antiviral poly(ε-caprolactone)/zein/Ag bead-on-string membranes and its application in air filtration

Cited by 27 publications

References 49 publications

Nanocellulose-based membrane as a potential material for high performance biodegradable aerosol respirators for SARS-CoV-2 prevention: a review

Nanocellulose-based membrane as a potential material for high performance biodegradable aerosol respirators for SARS-CoV-2 prevention: a review

Biodegradable Nanohybrid Materials as Candidates for Self-Sanitizing Filters Aimed at Protection from SARS-CoV-2 in Public Areas

Preparation of Needleless Electrospinning Polyvinyl Alcohol/Water-Soluble Chitosan Nanofibrous Membranes: Antibacterial Property and Filter Efficiency

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