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_2
Snippet: We have discovered a method to clean hospital-grade face masks by first soaking masks in an ethanol solution, air-drying them, then vacuum-drying them. Our study has found that this cleaning process can be used on a mask at least five times without altering the filter rate of the mask by more than one per cent. Vacuum-drying the masks removes a thin layer of water that still sticks to the fibers in the mask after air-drying. This layer of water i.....
Document: We have discovered a method to clean hospital-grade face masks by first soaking masks in an ethanol solution, air-drying them, then vacuum-drying them. Our study has found that this cleaning process can be used on a mask at least five times without altering the filter rate of the mask by more than one per cent. Vacuum-drying the masks removes a thin layer of water that still sticks to the fibers in the mask after air-drying. This layer of water is probably what causes the mask efficiency to drop (that is, how well it filters particles from the air). There is a danger that if the mask gets wet in other ways that it will not filter the air as well. This could also be fixed with the vacuum-drying procedure.
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