Fig. 2: Morphology, water harvesting and rheological properties of AWH-Hs.
From: High-efficiency atmospheric water harvesting enabled by ultrasonic extraction
a A schematic of the structure of a PAM-LiCl hydrogel with solvated lithium (Li⁺) and chloride (Cl⁻) ions diffused into a polymer network. b Photographs of synthesized PAM-LiCl hydrogels inside and outside a Petri dish, illustrating the contrast between the samples with the highest (HG-A) and the lowest (HG-C) storage moduli. c Optical images of the HG-A and HG-C hydrogels under manual stretching. d,e SEM images of HG-A (d) and HG-C (e) samples. f Mechanical properties of hydrogels measured at 25 °C and with an oscillatory load at 6.3 rad/s. g Water uptake (g/g) of hydrogels at four different RH levels at 25 °C. Scale bars: 12 mm (b); 24 mm (c), 200 µm (d); 300 µm (e).
