Fiber arrangement for facemask materials
FIG. 2. Three typical configurations of fiber arrangements and their response to the aerosol. (a) Crossed fibers (PVA). (b) Parallel or nearly parallel fibers (PVA). (c) Unparallel and untouched fibers (PVDF). All three configurations undergo two main stages: aerosol capture and liquid evaporation. Scale bar: 10 μm. Image courtesy of Physics of Fluids.