Super hygroscopic nanofibrous membrane-based moisture pump for solar-driven indoor dehumidification

Yufei Zhang, Lei Wu, Xianfeng Wang (), Jianyong Yu and Bin Ding ()
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Yufei Zhang: Donghua University
Lei Wu: Wuyi University
Xianfeng Wang: Donghua University
Jianyong Yu: Donghua University
Bin Ding: Donghua University

Nature Communications, 2020, vol. 11, issue 1, 1-11

Abstract: Abstract Desiccants play vital roles in dehumidification and atmospheric water harvesting; however, current desiccants have mediocre hygroscopicity, limited recyclability, and high energy consumption. Herein, we report a wood-inspired moisture pump based on electrospun nanofibrous membrane for solar-driven continuous indoor dehumidification. The developed moisture pump with multilayer wood-like cellular networks and interconnected open channels is composed of a desiccant layer and a photothermal layer. The desiccant layer exhibits an unprecedented moisture absorption capacity of 3.01 g g−1 at 90% relative humidity (RH), fast moisture absorption and transport rates, enabling atmospheric water harvesting. The photothermal layer shows a high solar absorption of 93%, efficient solar thermal conversion, and good moisture permeability, thus promoting water evaporation. The moisture pump efficiently reduces the indoor relative humidity to a comfort level (40‒60% RH) under one-sun illumination. This work opens the way to develop new-generation, high-performance nanofibrous membrane-based desiccants for energy-efficient humidity control and atmospheric water harvesting.

Date: 2020
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DOI: 10.1038/s41467-020-17118-3

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