Dry heat sterilization as a method to recycle N95 respirator masks: The importance of fit
Fig 3
SEM characterizations of three layers in 3M 1860 N95 FFR.
(a-b) SEM/EDS images of cross section. (c-e) SEM images of top-down view of untreated 3M 1860 N95. (f-h) SEM images of top-down view of the of 3M 1860 N95 after dry heat treatment at 100°C for 4 cycles. (i-k) SEM images of top-down view of the of 3M 1860 N95 after autoclaving treatment.