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. 2021 Apr 1;11(4):900. doi: 10.3390/nano11040900

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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(A) Filtration efficiency and breathing resistance of control (SPP/SPP) and monolayer spunbond polypropylene/polyacrylonitrile/spunbond polypropylene (SPP/PAN/SPP) filter with various nanofiber basis weights (g/m²). Results are presented as the mean ± SD (n = 3). (B) Diagram of spunbond polypropylene/polyacrylonitrile/spunbond polypropylene (SPP/PAN/SPP) filters with electrospun nanofibers.