Sandwich-Structured Photothermal Wood for Durable Moisture Harvesting and Pumping

Yu-Tang Li; Honglei Chen; Ran Deng; Ming-Bang Wu; Hao-Cheng Yang; Seth B. Darling

doi:10.1021/acsami.1c08901

journal article·2021-07-21Open access

Sandwich-Structured Photothermal Wood for Durable Moisture Harvesting and Pumping

Yu-Tang Li, Honglei Chen, Ran Deng, Ming-Bang Wu, Hao-Cheng Yang, Seth B. Darling

ACS Applied Materials & Interfaces· Volume 13· Issue 28

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Source abstract

Abstract

Moisture capture coupled with photothermal regeneration provides an alternative and sustainable way to acquire fresh water. Composite moisture absorbents based on hygroscopic salts are environmentally friendly, economically feasible, and of high efficiency but suffer from the unavoidable desiccant leakage during absorption and evaporation-induced salt accumulation on material surfaces during desorption. In this study, we develop a superhydrophobic–hydrophilic–hydrophobic photothermal wood embedded with CaCl2 to promote the durability of the absorbents. The sandwich structure serves as a liquid/vapor gate allowing vapor transport but forbidding liquid permeation, enabling the condensation and evaporation within the wood. Beyond moisture harvesting, the sandwich-structured photothermal wood exhibits potential in indoor dehumidification by pumping the moisture through an absorption–desorption cycle.

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Research context

Composites

OpenAlex topics: Solar-Powered Water Purification Methods · Adsorption and Cooling Systems · Phase Change Materials Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Chemical Engineering and Technology, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-sen University, Zhuhai 519082, China

School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China

Center for Molecular Engineering and Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States

Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center, Argonne National Laboratory, Lemont, Illinois 60439, United States

Funding

Basic Energy Sciences · Central University Basic Research Fund of China · National Natural Science Foundation of China · Guangzhou Scientific and Technological Planning Project

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