Extended Data Fig. 7: Reusability test.
From: Bioinspired capillary force-driven super-adhesive filter
a, Schematics of washing and PRO layer regeneration cycle. Photos indicate polypropylene (PP) pre-filter after filtration (left) and after washing with detergent water (middle). b-d, Filtration efficiencies of PP pre-filter with PM1.0 (b), PM2.5 (c), and PM10 (d) represented as a function of washing/re-coating cycles. Inset SEM image of PM1.0 exhibits the structure of PP pre-filters. e-g, Filtration efficiencies of PP HEPA filter with PM1.0 (e), PM2.5 (f), and PM10 (g) represented as a function of washing cycles. Inset SEM image of PM1.0 exhibits the structure of PP HEPA filter. Errors show s.d.; n = 3.
