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Multi-layered micro/nanofibrous nonwovens for functional face mask filter

The worldwide COVID-19 pandemic has led to an attention on the usage of personal protective face masks. However, the longevity and safety of the commercial face masks are limited due to the charge dissipation of the electret meltblown nonwovens, which are dominate in the face mask filters. Herein, w...

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Autores principales: Xu, Yuanqiang, Zhang, Xiaomin, Teng, Defang, Zhao, Tienan, Li, Ying, Zeng, Yongchun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Tsinghua University Press 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9094123/
https://www.ncbi.nlm.nih.gov/pubmed/35578617
http://dx.doi.org/10.1007/s12274-022-4350-2
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author Xu, Yuanqiang
Zhang, Xiaomin
Teng, Defang
Zhao, Tienan
Li, Ying
Zeng, Yongchun
author_facet Xu, Yuanqiang
Zhang, Xiaomin
Teng, Defang
Zhao, Tienan
Li, Ying
Zeng, Yongchun
author_sort Xu, Yuanqiang
collection PubMed
description The worldwide COVID-19 pandemic has led to an attention on the usage of personal protective face masks. However, the longevity and safety of the commercial face masks are limited due to the charge dissipation of the electret meltblown nonwovens, which are dominate in the face mask filters. Herein, we design a type of multi-layer structured nonwovens using meltblowing and electrospinning technologies. The complex nonwovens involving meltblown and electrospun fibers are designed to possess multilevel fiber diameters and pore sizes. The micro/nanofibers with porous and wrinkled surface morphologies can well capture particulate matters (PMs), and the multilevel pore sizes contribute to low air resistance under high filtration efficiency. Airflow field simulation was carried out to understand the pressure distribution within the nonwovens in the filtration process. Meanwhile, by adding Ag nanoparticles (AgNPs) as additives, the nonwovens exhibit excellent antibacterial performance. The resultant nonwovens exhibit filtration efficiency of 99.1% for PM(0.3) and low pressure drop of 105 Pa under the 10.67 cm/s inlet air velocity, and antibacterial rate of > 99.99% for Escherichia coli. These performances and functions make the designed complex nonwovens a promising filter core for face masks. [Image: see text] ELECTRONIC SUPPLEMENTARY MATERIAL: Supplementary material (Fig. S1. The filtration efficiencies of a brand of surgical mask changes with the storage time under the condition of 100% humidity. Fig. S2. The FE-SEM images of the fibers after blocking PMs. Fig. S3. Illustration of 3D structure models of the nonwovens. Fig. S4. Diameter distribution of AgNPs. Table S1. The structure parameters and filtration performances of the PP-M fibers with and without pores and wrinkles. Table S2. Filtration performance of PP-M/PLA-M/PLA-N nonwovens and commercial face masks. Table S3. The structural parameters for the nonwovens. Table S4. The filtration efficiencies and pressure drops of the PP, PE spunbonded nonwovens, and PP-M/PLA-M/PLA-N@AgNPs nonwovens) is available in the online version of this article at 10.1007/s12274-022-4350-2.
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spelling pubmed-90941232022-05-12 Multi-layered micro/nanofibrous nonwovens for functional face mask filter Xu, Yuanqiang Zhang, Xiaomin Teng, Defang Zhao, Tienan Li, Ying Zeng, Yongchun Nano Res Research Article The worldwide COVID-19 pandemic has led to an attention on the usage of personal protective face masks. However, the longevity and safety of the commercial face masks are limited due to the charge dissipation of the electret meltblown nonwovens, which are dominate in the face mask filters. Herein, we design a type of multi-layer structured nonwovens using meltblowing and electrospinning technologies. The complex nonwovens involving meltblown and electrospun fibers are designed to possess multilevel fiber diameters and pore sizes. The micro/nanofibers with porous and wrinkled surface morphologies can well capture particulate matters (PMs), and the multilevel pore sizes contribute to low air resistance under high filtration efficiency. Airflow field simulation was carried out to understand the pressure distribution within the nonwovens in the filtration process. Meanwhile, by adding Ag nanoparticles (AgNPs) as additives, the nonwovens exhibit excellent antibacterial performance. The resultant nonwovens exhibit filtration efficiency of 99.1% for PM(0.3) and low pressure drop of 105 Pa under the 10.67 cm/s inlet air velocity, and antibacterial rate of > 99.99% for Escherichia coli. These performances and functions make the designed complex nonwovens a promising filter core for face masks. [Image: see text] ELECTRONIC SUPPLEMENTARY MATERIAL: Supplementary material (Fig. S1. The filtration efficiencies of a brand of surgical mask changes with the storage time under the condition of 100% humidity. Fig. S2. The FE-SEM images of the fibers after blocking PMs. Fig. S3. Illustration of 3D structure models of the nonwovens. Fig. S4. Diameter distribution of AgNPs. Table S1. The structure parameters and filtration performances of the PP-M fibers with and without pores and wrinkles. Table S2. Filtration performance of PP-M/PLA-M/PLA-N nonwovens and commercial face masks. Table S3. The structural parameters for the nonwovens. Table S4. The filtration efficiencies and pressure drops of the PP, PE spunbonded nonwovens, and PP-M/PLA-M/PLA-N@AgNPs nonwovens) is available in the online version of this article at 10.1007/s12274-022-4350-2. Tsinghua University Press 2022-05-11 2022 /pmc/articles/PMC9094123/ /pubmed/35578617 http://dx.doi.org/10.1007/s12274-022-4350-2 Text en © Tsinghua University Press 2022 This article is made available via the PMC Open Access Subset for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the World Health Organization (WHO) declaration of COVID-19 as a global pandemic.
spellingShingle Research Article
Xu, Yuanqiang
Zhang, Xiaomin
Teng, Defang
Zhao, Tienan
Li, Ying
Zeng, Yongchun
Multi-layered micro/nanofibrous nonwovens for functional face mask filter
title Multi-layered micro/nanofibrous nonwovens for functional face mask filter
title_full Multi-layered micro/nanofibrous nonwovens for functional face mask filter
title_fullStr Multi-layered micro/nanofibrous nonwovens for functional face mask filter
title_full_unstemmed Multi-layered micro/nanofibrous nonwovens for functional face mask filter
title_short Multi-layered micro/nanofibrous nonwovens for functional face mask filter
title_sort multi-layered micro/nanofibrous nonwovens for functional face mask filter
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9094123/
https://www.ncbi.nlm.nih.gov/pubmed/35578617
http://dx.doi.org/10.1007/s12274-022-4350-2
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