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Super Moisture‐Sorbent Zwitterionic Polyelectrolyte Hydrogel for Ultra‐Efficient Atmospheric Water Harvesting

Researchers have created a zwitterionic polyelectrolyte hydrogel and integrated it onto porous anodized aluminum foam, forming the LC‑PIL‑SO3Li‑CNT@AAF composite. The material achieves a moisture uptake of 16.33 g per gram of hydrogel at 90 % relative humidity, a 322 % improvement over prior designs. It also demonstrates rapid low‑temperature desorption, releasing 83.34 % of absorbed water after two hours at 40 °C. A ten‑day field trial showed the composite can reliably irrigate plants, highlighting its practical potential for atmospheric water harvesting.