Patterned nanofiber air filters with high optical transparency, robust mechanical strength, and effective PM<sub>2.5</sub> capture capability

Cao, Jinshan; Cheng, Zhiqiang; Kang, Lijuan; Lin, Meng; Han, Lihao

doi:10.1039/d0ra01967d

Cited by 35 publications

(24 citation statements)

References 34 publications

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“…In one study, patterned nanofiber air filters with high optical transparency and effective PM 2.5 capture capability were fabricated via electrospinning technology ( Fig. 10 b) [ 137 ]. The patterned nanofibers exhibited high porosity (>80%) and high PM 2.5 filtration efficiency of 99.99% with good transmittance of about 69%.…”

Section: Innovations Of Face Masksmentioning

confidence: 99%

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Electrospun ultrafine fibers for advanced face masks

Zhang

et al. 2021

Materials Science and Engineering: R: Reports

140

119

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The outbreak of Coronavirus Disease 2019 (COVID-19), which is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has triggered great global public health concern. Face masks are essential tools to reduce the spread of SARS-CoV-2 from human to human. However, there are still challenges to prolong the serving life and maintain the filtering performance of the current commercial mask. Filters composed of ultrafine fibers with diameter down to tens of nanometers have the potential to physically block viruses. With adjustable composition and nanostructures, the electrospun ultrafine fiber filter is possible to achieve other necessary functions beyond virus blocking, such as antiviral, transparent, and degradable, making it an important part of fighting the epidemic. In this review, beginning with the basic information of the viruses, we summarize the knowledge of masks and respirators, including the filtering mechanism, structure, classification, and standards. We further present the fabrication method, filtering performance, and reusable potential of electrospun ultrafine fiber-based masks. In the end, we discuss the development directions of ultrafine fibers in protective devices, especially their new functional applications and possible contributions in the prevention and control of the epidemic.

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Section: Innovations Of Face Masksmentioning

confidence: 99%

“…(d) Comparison of the removal efficiency between plain weave (PW), herringbone (HB), lozenge stria (LS) pattern of the fibrous membranes. Reproduced with permission from [ 137 ]. Copyright 2020, RSC Advances.…”

Section: Innovations Of Face Masksmentioning

confidence: 99%

Electrospun ultrafine fibers for advanced face masks

Zhang

et al. 2021

Materials Science and Engineering: R: Reports

140

119

View full text Add to dashboard Cite

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“…To evaluate the overall performance of all filters in terms of efficiency and pressure drop, a quality factor (QF), Q f , was used as an indicator. Q f is defined as [18,19]:…”

Section: Testingmentioning

confidence: 99%

Eco-Friendly Poly(Vinyl Alcohol) Nanofiber-Based Air Filter for Effectively Capturing Particulate Matter

Kim

Choi

Sung³

et al. 2021

Applied Sciences

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Due to the increasing use of polypropylene-based nonwoven dust masks and air filters, environmental problems that occur due to the plastic pollution resulting from the disposal of these materials have also increased. Hence, an eco-friendly air filter based on PVA nanofibers (NFs) was fabricated by electrospinning on a nonwoven fabric, and its performance was evaluated as a filter capable of blocking or capturing particulate matter. The quality factor of the optimized PVA NF-based air filter was found to be 0.010606 Pa−1, which is lower than that of a HEPA filter (0.015394 Pa−1), but higher than that of a cabin air filter (0.010517 Pa−1) and a dust mask (0.009102 Pa−1). The contamination level of the PVA NF-based filter was analyzed by optical and structural analyses of the filter surface. Finally, the filter was soaked in water to selectively remove the contaminated PVA NF layer, and the remaining nonwoven fabric was able to be reused to make the filter.

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“…[6] Due to the outstanding processability and flexibility of polymer materials, various nanofibrous air filters have been developed over the past years. [7][8][9][10] However, these fibrous materials based air filters are disposable, unideal for removing small-sized PM, and faced with doubts about the toxicity of carbon nanotubes. With the rapid growth in demand, the development of reusable air filters for mask or air fresh system is urgently needed.…”

Section: Introductionmentioning

confidence: 99%

Performance‐Enhanced and Washable Triboelectric Air Filter Based on Polyvinylidene Fluoride/UiO‐66 Composite Nanofiber Membrane

Wang

Tian

et al. 2021

Macro Materials & Eng

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Applying triboelectric nanogenerators (TENGs) in air filtration systems to generate electric charges through friction is a major advancement in air cleaning technology. The performance of triboelectric air filter strongly depends on the properties of triboelectric materials. In this work, a better triboelectric material, polyvinylidene fluoride (PVDF)/UiO‐66 composite nanofiber membrane (P6‐NFM), is designed and fabricated through electrospinning technology by doping UiO‐66 into PVDF matrix. As the weight ratio of UiO‐66 increases to 1%, PVDF/UiO‐66 composite nanofiber‐based TENG (P6‐TENG) achieves the maximum current, voltage, and triboelectric charge of 4.29 µA, 52.8 V, and 22.02 nC, which are 6.5 times, 5.1 times, and 8.0 times as large as those of pure PVDF‐based TENG (P‐TENG). Therefore, the triboelectric air filter based on P6‐NFM can be easily charged by slapping the fiber membrane and spun‐bond fabric. After charging, the removal efficiency of P6‐NFM is 92% for PM0.5 and 98% for PM2.5, which are 2.8 and 1.2 times those of the uncharged one. More importantly, the filtration efficiency of this air filter keeps stable after the membrane is washed four times. This method of loading UiO‐66 on the triboelectric fiber material shows tremendous potential in self‐charging and reusable air purification applications.

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Patterned nanofiber air filters with high optical transparency, robust mechanical strength, and effective PM_2.5 capture capability

Abstract: PM2.5, due to its small particle size, strong activity, ease of the attachment of toxic substances and long residence time in the atmosphere, has a great impact on human health and daily production.

Cited by 35 publications

References 34 publications

Electrospun ultrafine fibers for advanced face masks

Electrospun ultrafine fibers for advanced face masks

Eco-Friendly Poly(Vinyl Alcohol) Nanofiber-Based Air Filter for Effectively Capturing Particulate Matter

Performance‐Enhanced and Washable Triboelectric Air Filter Based on Polyvinylidene Fluoride/UiO‐66 Composite Nanofiber Membrane

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Patterned nanofiber air filters with high optical transparency, robust mechanical strength, and effective PM2.5 capture capability

Abstract: PM2.5, due to its small particle size, strong activity, ease of the attachment of toxic substances and long residence time in the atmosphere, has a great impact on human health and daily production.

Cited by 35 publications

References 34 publications

Electrospun ultrafine fibers for advanced face masks

Electrospun ultrafine fibers for advanced face masks

Eco-Friendly Poly(Vinyl Alcohol) Nanofiber-Based Air Filter for Effectively Capturing Particulate Matter

Performance‐Enhanced and Washable Triboelectric Air Filter Based on Polyvinylidene Fluoride/UiO‐66 Composite Nanofiber Membrane

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Product

Resources

About

Patterned nanofiber air filters with high optical transparency, robust mechanical strength, and effective PM_2.5 capture capability