Figure 3.

Characterization of aerogel gauzes. a) 3D printing KNF‐PVA ink in the gauze pattern. b) Final KNF‐PVA aerogel gauze after solvent exchange and supercritical drying in sequence. c) SEM image of the aerogel gauze. d) Characterization of water flux for KNF‐PVA aerogel gauze (KP‐A) and QCG. e) Water absorption by the KNF‐PVA aerogel filament. f,g) are dynamic and final water absorption mass scaled by self‐weight for QCG and KNF‐PVA aerogel gauze (KP‐A) with different original concentrations. h) Extracted pixel intensity from images (inset) taken 1 min after depositing drops containing Sudan‐III stained SiO₂ particles (diameter ≈ 3 µm) on KP‐A and QCG. i) Tensile curves of KNF‐PVA hydrogel gauzes KP‐H (Figure 2g‐II) and aerogel gauzes (KP‐A). Data in (d), (f), and (g) were shown with mean values and standard deviation acquired from three parallel experiments.