Polymers, Free Full-Text
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Currently, almost 70% of the world’s population occupies urban areas. Owing to the high population density in these regions, they are exposed to various types of air pollutants. Fine particle air pollutants (<2.5 μm) can easily invade the human respiratory system, causing health issues. For fine particulate matter filtration, the use of a face mask filter is efficient; however, its use is accompanied by a high-pressure drop, making breathing difficult. Electrostatic interactions in the filter of the face mask constitute the dominant filtration mechanism for capturing fine particulate matter; these masks are, however, significantly weakened by the high humidity in exhaled breath. In this study, we demonstrate that a filter with an electrostatically rechargeable structure operates with normal breathing air power. In our novel face mask, a filter membrane is assembled by layer-by-layer stacking of the electrospun PVDF nanofiber mat formed on a nylon mesh. Tribo/piezoelectric characteristics via multilayer structure enhance filtration performance, even under air-powered filter bending taken as a normal breathing condition. The air gap between nanofiber and mesh layers increases air diffusion time and preserves the electrostatic charges within the multi-layered nanofiber filter membrane under humid air penetration, which is advantageous for face mask applications.
![](https://i1.rgstatic.net/publication/339518599_Biodegradable_Polymers_Present_Opportunities_and_Challenges_in_Providing_a_Microplastic-Free_Environment/links/5e8178b4458515efa0b891d0/largepreview.png)
PDF) Biodegradable Polymers: Present Opportunities and Challenges in Providing a Microplastic-Free Environment
![](https://pub.mdpi-res.com/polymers/polymers-07-01346/article_deploy/html/images/polymers-07-01346-g004.png?1438080210)
Polymers, Free Full-Text
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Polymers, Free Full-Text, Conductive Thread
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Polymers, Free Full-Text, Conductive Thread
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Polymers, Free Full-Text
![](https://www2.chemistry.msu.edu/faculty/reusch/virttxtjml/Images2/condpol1.gif)
Polymers
![](https://www2.chemistry.msu.edu/faculty/reusch/virttxtjml/Images2/htransfr.gif)
Polymers
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Polymers, Free Full-Text
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Polymers, Free Full-Text
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Polymers, Free Full-Text, Conductive Thread
![](https://pub.mdpi-res.com/polymers/polymers-14-00925/article_deploy/html/images/polymers-14-00925-g001.png?1645781124)
Polymers, Free Full-Text
![](https://www2.chemistry.msu.edu/faculty/reusch/virttxtjml/Images2/radterm.gif)
Polymers
![](https://www.researchgate.net/publication/366048836/figure/tbl2/AS:11431281105005252@1670333487223/Summarized-results-average-for-super-absorption-polymers-SAPs-combined-with-diverse.png)
Summarized results (average) for super absorption polymers (SAPs)
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