Unusual Temperature Dependence of Water Sorption in Semicrystalline Hydrogels

© 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 35(2023), 22 vom: 29. Juni, Seite e2211763
1. Verfasser: Liu, Xinyue (VerfasserIn)
Weitere Verfasser: Zhang, Lenan, El Fil, Bachir, Díaz-Marín, Carlos D, Zhong, Yang, Li, Xiangyu, Lin, Shaoting, Wang, Evelyn N
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article hydrogels phase transformation temperature dependence vapor sorption water harvesting
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520 |a Water vapor sorption is a ubiquitous phenomenon in nature and plays an important role in various applications, including humidity regulation, energy storage, thermal management, and water harvesting. In particular, capturing moisture at elevated temperatures is highly desirable to prevent dehydration and to enlarge the tunability of water uptake. However, owing to the thermodynamic limit of conventional materials, sorbents inevitably tend to capture less water vapor at higher temperatures, impeding their broad applications. Here, an inverse temperature dependence of water sorption in poly(ethylene glycol) (PEG) hydrogels, where their water uptake can be doubled with increasing temperature from 25 to 50 °C, is reported. With mechanistic modeling of water-polymer interactions, this unusual water sorption is attributed to the first-order phase transformation of PEG structures, and the key parameters for a more generalized strategy in materials development are identified. This work elucidates a new regime of water sorption with an unusual temperature dependence, enabling a promising engineering space for harnessing moisture and heat 
650 4 |a Journal Article 
650 4 |a hydrogels 
650 4 |a phase transformation 
650 4 |a temperature dependence 
650 4 |a vapor sorption 
650 4 |a water harvesting 
700 1 |a Zhang, Lenan  |e verfasserin  |4 aut 
700 1 |a El Fil, Bachir  |e verfasserin  |4 aut 
700 1 |a Díaz-Marín, Carlos D  |e verfasserin  |4 aut 
700 1 |a Zhong, Yang  |e verfasserin  |4 aut 
700 1 |a Li, Xiangyu  |e verfasserin  |4 aut 
700 1 |a Lin, Shaoting  |e verfasserin  |4 aut 
700 1 |a Wang, Evelyn N  |e verfasserin  |4 aut 
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