Fabrication of Fiber Filters with Antibacterial Properties for VOC and Particle Removal

Juuti, Paxton; Nikka, Markus; Gunell, Marianne; Eerola, Erkki; Saarinen, Jarkko J.; Omori, Youichi; Seto, Takafumi; Mäkelä, Jyrki M.

doi:10.4209/aaqr.2018.12.0474

Cited by 11 publications

(6 citation statements)

References 24 publications

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“…Most of the published research utilizing LFS has been conducted in this sort of a setup and a burner with only two gas channels. However, we chose another burner design (earlier referred to as KP burner by Aromaa et al 16 ) that has been used in a few recent studies 19–22 . With this burner, a small additional nitrogen flow is often added between the other flows to push the flame further from the burner head, thus keeping it clean 16 .…”

Section: Methodsmentioning

confidence: 99%

Crystallographic phase formation of iron oxide particles produced from iron nitrate by liquid flame spray with a dual oxygen flow

Sorvali

Honkanen

Hyvärinen

et al. 2021

Int J Ceramic Engine & Sci

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We fabricated iron oxide particles from iron(III) nitrate in a liquid flame spray synthesis. Unlike in most liquid flame spray studies, we implemented a secondary oxygen flow. The effect of the gas flow setup and two additives to the precursor solution, oxalic acid and citric acid, on the resulting particles was studied, with the focus on crystallographic phase composition. The synthesis yielded either pure maghemite or maghemite/hematite mixed phase powders. For solutions without additives, the maghemite fraction was almost linearly dependent on the equivalence ratio. The specific surface area was highest for the smallest equivalence ratios, then decreased, and increased again for the highest values. Some variation was observed between samples with equal equivalence ratios but the total oxygen flow divided differently between the two oxygen channels, a higher atomization flow promoting larger hematite fraction and higher specific surface area. Both additives reduced the amount of hematite in the powder samples, citric acid being the more efficient one. Citric acid slightly raised the specific surface area, whereas oxalic acid dropped it in half.

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Section: Methodsmentioning

confidence: 99%

Crystallographic phase formation of iron oxide particles produced from iron nitrate by liquid flame spray with a dual oxygen flow

Sorvali

Honkanen

Hyvärinen

et al. 2021

Int J Ceramic Engine & Sci

Self Cite

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“…It is reported by Jung et al that using a hybrid of Ag NPs and carbon nanotubes (CNT) made an advanced bactericidal air filtration possible [100]. Another study reported that nanofibers made from PVA incorporated with Ag NPs showed effective antibacterial properties especially for E. coli, however, higher filtration efficiency led to an increased pressure drop [101]. Kharaghani et al produced washable nanofibers with PAN/AgNPs where AgNPs illustrated antibacterial activity against Pseudomonas and Staphylococcus bacteria and promoted washability [59].…”

Section: Nanofiber Membranes Against Pathogensmentioning

confidence: 99%

Nanofibers in Respiratory Masks: An Alternative to Prevent Pathogen Transmission

Tabatabaei

Faridi‐Majidi

Boroumand³

et al. 2023

IEEE Trans.on Nanobioscience

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Recent global outbreak of COVID-19 has raised serious awareness about our abilities to protect ourselves from hazardous pathogens and volatile organic compounds. Evidence suggests that personal protection equipment such as respiratory masks can radically decrease rates of transmission and infections due to contagious pathogens. To increase filtration efficiency without compromising breathability, application of nanofibers in production of respiratory masks have been proposed. The emergence of nanofibers in the industry has since introduced a next generation of respiratory masks that promises improved filtration efficiency and breathability via nanometric pores and thin fiber thickness. In addition, the surface of nanofibers can be functionalized and enhanced to capture specific particles. In addition to conventional techniques such as melt-blown, respiratory masks by nanofibers have provided an opportunity to prevent pathogen transmission. As the surge in global demand for respiratory masks increases, herein, we reviewed recent advancement of nanofibers as an alternative technique to be used in respiratory mask production.

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“…PCL membranes showed a filtration efficiency of 84.9%. The addition of NPs onto electrospun membranes is expected to improve their adsorption capacity, enhancing the overall filtration performance of the membranes [22,52].…”

Section: Filtration Efficiencymentioning

confidence: 99%

Antibacterial and Biodegradable Electrospun Filtering Membranes for Facemasks: An Attempt to Reduce Disposable Masks Use

et al. 2021

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Due to the prevalence of the COVID-19 pandemic, the demand for disposable facemasks has become a global issue. Unfortunately, the use of these products has negative effects on the environment, and therefore, the use of biodegradable materials is a powerful strategy to overcome this challenge. Aligned with this concept, in this work, biodegradable facemasks were developed using poly(ε-caprolactone) (PCL) polymer and cotton natural fibers. The filter layer was produced using an electrospinning technique, since electrospun membranes present remarkable characteristics for air filtration. The electrospun membranes were functionalized with different nanoparticles (NPs), including silver (Ag), titanium dioxide (TiO2) and magnesium oxide (MgO), in order to include new properties, namely antibacterial effect. The developed membranes were characterized by FESEM, EDS, ATR-FTIR, GSDR and TGA, which confirmed the successful impregnation of NPs onto PCL membranes. The antibacterial effect and filtration efficiency were assessed, with the PCL/MgO NPs membrane presenting better results, showing inhibition zone diameters of 25.3 and 13.5 mm against Gram-positive and Gram-negative bacteria, respectively, and filtration efficiency of 99.4%. Three facemask prototypes were developed, and their filtration efficiency, air permeability and thermal comfort were evaluated. Overall, this study demonstrates the potential of PCL/NPs electrospun membranes to act as an active and biodegradable filter layer in facemasks.

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Fabrication of Fiber Filters with Antibacterial Properties for VOC and Particle Removal

Cited by 11 publications

References 24 publications

Crystallographic phase formation of iron oxide particles produced from iron nitrate by liquid flame spray with a dual oxygen flow

Crystallographic phase formation of iron oxide particles produced from iron nitrate by liquid flame spray with a dual oxygen flow

Nanofibers in Respiratory Masks: An Alternative to Prevent Pathogen Transmission

Antibacterial and Biodegradable Electrospun Filtering Membranes for Facemasks: An Attempt to Reduce Disposable Masks Use

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