Metal- and halide-free, solid-state polymeric water vapor sorbents for efficient water-sorption-driven cooling and atmospheric water harvesting

Wu, Mengchun; Li, Renyuan; Shi, Yusuf; Altunkaya, Mustafa; Aleid, Sara; Zhang, Chenlin; Wang, Wenbin; Wang, Peng

doi:10.1039/d0mh02051f

Cited by 75 publications

(82 citation statements)

References 72 publications

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“…These results indicated the RIG possessed competitive hygroscopic capacities with other reported start‐of‐art sorbent materials. [ 10,12,18,25,31 ]…”

Section: Resultsmentioning

confidence: 99%

“…These results indicated the RIG possessed competitive hygroscopic capacities with other reported start-of-art sorbent materials. [10,12,18,25,31] In order to further characterize the structural stability of RIG after moisture sorption, the hydrated sample was measured by rheological tests (Figure 1d). Although there was a decrease of storage modulus, the hydrated RIG still demonstrated an elastic behavior similar to the original dehydrated state.…”

Section: Hygroscopic Mechanisms and Performances Of Rigmentioning

confidence: 99%

“…Recently, diverse hygroscopic hydrogel materials have been reported to achieve effective and longer evaporative cooling due to its high-capacity moisture sorption. [16][17][18] However, when long-term cooling is conducted, these conventional In thermoelectric generator (TEG) systems, heat dissipation from their cold sides is an accessible, low-cost, and effective way to increase the temperature gap for their thermoelectric performance enhancement. Although significant efforts have been dedicated mediated by hygroscopic hydrogel coolers as selfsustained alternatives for effective heat removal, it still remains a challenge for overcoming instabilities in their cooling process.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, diverse hygroscopic hydrogel materials have been reported to achieve effective and longer evaporative cooling due to its high‐capacity moisture sorption. [ 16–18 ] However, when long‐term cooling is conducted, these conventional hydrogels may experience excessive water desorption and further result in severely mechanical deformation, causing their cooling performance decline and even failure. [ 17,19 ] In addition, due to their weak adhesive interfaces, these reported hydrogels present poor adaptability either in portable or moving occasions, which may be a risk of detaching from the cooling interface.…”

Section: Introductionmentioning

confidence: 99%

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Atmospheric Hygroscopic Ionogels with Dynamically Stable Cooling Interfaces Enable a Durable Thermoelectric Performance Enhancement

et al. 2021

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In thermoelectric generator (TEG) systems, heat dissipation from their cold sides is an accessible, low‐cost, and effective way to increase the temperature gap for their thermoelectric performance enhancement. Although significant efforts have been dedicated mediated by hygroscopic hydrogel coolers as self‐sustained alternatives for effective heat removal, it still remains a challenge for overcoming instabilities in their cooling process. The inevitable mechanical deformation of these conventional hydrogels induced by excessive water desorption may cause a detached cooling interface with the targeted substrates, leading to undesirable cooling failure. Herein, a self‐sustained and durable evaporative cooling approach for TEG enabled by atmospheric hygroscopic ionogels (RIGs) with stable interfaces to efficiently improve its thermoelectric performance is proposed. Owing to its superior hygroscopicity, the RIGs can achieve higher heat dissipation for TEG through water evaporation than that of common commercial metal heat sinks. Moreover, its favorable adhesion enables the RIG closely interact with the TEG surface either in static or dynamic conditions for a durable thermoelectric performance enhancement. It is believed that such a self‐sustained evaporative cooling strategy based on the RIG will have great implications for the enhancement of TEG's efficiency, demonstrating a great promise in intermittent thermal‐energy utilizations.

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“…These results indicated the RIG possessed competitive hygroscopic capacities with other reported start‐of‐art sorbent materials. [ 10,12,18,25,31 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Hygroscopic Mechanisms and Performances Of Rigmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Atmospheric Hygroscopic Ionogels with Dynamically Stable Cooling Interfaces Enable a Durable Thermoelectric Performance Enhancement

et al. 2021

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“…Even after 10 sorption–desorption cycles in the DVS system, the water absorption capacity and kinetics of the PDMAPS‐LiCl‐1 hydrogel still maintain stable (Figure 2d). Compared with most of the the‐state‐of‐the‐art of polymeric sorbent‐based AWH materials, the as‐prepared polyzwitterionic hydrogel exhibits superior AWH performance [4b,d, 9a,c, 10a, 11a, c, 18] …”

Section: Figurementioning

confidence: 99%

Polyzwitterionic Hydrogels for Efficient Atmospheric Water Harvesting

et al. 2022

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Atmospheric water harvesting (AWH) is regarded as one of the promising strategies for freshwater production desirable to provide sustainable water for landlocked and arid regions. Hygroscopic materials have attracted widespread attention because of their water harvesting performance. However, the introduction of many inorganic salts often leads to aggregation and leakage issues in practical use. Here, polyzwitterionic hydrogels are developed as an effective AWH material platform. Via anti‐polyelectrolyte effects, the hygroscopic salt coordinated with polymer chains could capture moisture and enhance the swelling property, leading to a strong moisture sorption capacity. The hydrogel shows superior AWH performance (0.62 g g−1, 120 minutes for equilibrium at 30 % relative humidity) and produces 5.87 L kg−1 freshwater per day. It is anticipated that the polyzwitterionic hydrogels with unique salt‐responsive properties could provide new insights into the design and synthesis of next‐generation AWH materials.

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Self‐Contained Moisture Management and Evaporative Cooling Through 1D to 3D Hygroscopic All‐Polymer Composites

Li,

Shao,

et al. 2023

Adv Funct Materials

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Sorption‐based moisture management and evaporative cooling represent emerging technologies with substantial potential for energy‐saving personal thermal management (PTM). However, design of high‐performance and durable hygroscopic composites combining efficient heat dissipation with wearing comfort presents significant challenges. Herein, hygroscopic 1D nanofibers and 2D fabrics are developed using two hygroscopic polymers and crosslinking strategies. The design endows the fabrics with self‐contained properties including excellent hygroscopicity, durability, ductility, breathability, washability, and antimicrobial capability. The fabrics exhibit thickness‐independent moisture sorption and equilibrium water uptake of 1.19 g g−1 in 4 h under 90% relative humidity (RH). About 80% of the absorbed water can be rapidly released through mild heating within 10 min. These high moisture sorption/desorption rates outperform the majority of composite desiccants, enabling up to five sorption/desorption cycles per day under a real sky. The hygroscopic fabrics can reduce apparent temperatures and prevent unsightly sweat stains on clothing, improving thermal and clothing comfort. Furthermore, hygroscopic 3D hierarchical matrices are printed, showcasing the potential to use small amounts of hygroscopic materials to boost moisture sorption. This work advances the controlled fabrication of hygroscopic polymer composites, ranging from 1D nanofibers and 2D fabrics to 3D matrices, highlighting their promising prospects for future sorption‐based PTM applications.

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Metal- and halide-free, solid-state polymeric water vapor sorbents for efficient water-sorption-driven cooling and atmospheric water harvesting

Abstract: Metal- and halide-free, solid-state water vapor sorbents are highly desirable for water-sorption-based applications, because most of the solid sorbents are suffering from low water sorption capacity or toxic metals, while...

Cited by 75 publications

References 72 publications

Atmospheric Hygroscopic Ionogels with Dynamically Stable Cooling Interfaces Enable a Durable Thermoelectric Performance Enhancement

Atmospheric Hygroscopic Ionogels with Dynamically Stable Cooling Interfaces Enable a Durable Thermoelectric Performance Enhancement

Polyzwitterionic Hydrogels for Efficient Atmospheric Water Harvesting

Self‐Contained Moisture Management and Evaporative Cooling Through 1D to 3D Hygroscopic All‐Polymer Composites

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