Author: Albert I. Nazeeri; Isaac A. Hilburn; Daw-An Wu; Kabir A. Mohammed; D. Yovan Badal; Moses H.W. Chan; Joseph L. Kirschvink
Title: An Efficient Ethanol-Vacuum Method for the Decontamination and Restoration of Polypropylene Microfiber Medical Masks & Respirators Document date: 2020_4_16
ID: ncjdsbn4_26
Snippet: is the (which was not peer-reviewed) The copyright holder for this preprint . https://doi.org/10.1101/2020.04.12.20059709 doi: medRxiv preprint capturing the particles. Assuming the diameter of the polypropylene fibers are ~1 μm, a monolayer of water (~0.1 nm thick) would increase the mass of a mask by around 25% 12 . We have observed this experimentally: when a mask is treated and left to air dry overnight, a residual of several grams is left. .....
Document: is the (which was not peer-reviewed) The copyright holder for this preprint . https://doi.org/10.1101/2020.04.12.20059709 doi: medRxiv preprint capturing the particles. Assuming the diameter of the polypropylene fibers are ~1 μm, a monolayer of water (~0.1 nm thick) would increase the mass of a mask by around 25% 12 . We have observed this experimentally: when a mask is treated and left to air dry overnight, a residual of several grams is left. Hence, it is not surprising that the N95 face masks become ineffective after even one rinsing process.
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