Surface Function Modification for Enhancing Water Sorption Capacity of Hygroscopic Biomass Absorbent
발표자
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초록
내용
Atmospheric Water Harvesting (AWH) is a promising solution for freshwater scarcity in arid regions. While salt-based hygroscopic biomass absorbents AWH offer low cost and fast kinetics, their efficiency is limited by low hydrophilicity and requires high energy for desorption. This study introduces TEMPO oxide cellulose nanocrystals (TOCNC) hydrogel as a high-performance AWH material. TOCNC's rigid network with carboxyl groups efficiently captures water vapor even under low relative humidity (RH). The interaction between the hydrophilic hydrogel network due to carboxyl groups and collected water reduces desorption heat. AWH utilizing our materials is expected to achieve a water absorption/desorption capacity of 1.27g/g at 30% RH and produce 8.4L/kg of fresh water daily. This technique offers a sustainable and efficient approach to water harvesting in arid regions.