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Article: Self-Assembled Nanofibrous Hydrogels with Tunable Porous Network for Highly Efficient Solar Desalination in Strong Brine

TitleSelf-Assembled Nanofibrous Hydrogels with Tunable Porous Network for Highly Efficient Solar Desalination in Strong Brine
Authors
Keywordshydrogel evaporators
nanofiber networks
salt resistance
solar desalination
structure-performance nexus
Issue Date1-Sep-2023
PublisherWiley
Citation
Advanced Functional Materials, 2023, v. 33, n. 47 How to Cite?
Abstract

Hydrogel-based solar evaporators (HSEs) emerged as energy-efficient designs for water purification due to the reduced vaporization enthalpy in the hydrated polymeric network. However, it remains challenging for HSEs to achieve stable performance in desalination, partly due to the tradeoff between desired evaporation dynamics and salt tolerance. Here, composite hydrogels with tunable self-assembled nanofiber networks are exploited for the engineering of solar evaporators with both high evaporation performance and resistance to salt accumulation. The nanofibrous hydrogel solar evaporators (NHSEs) present an intrinsic open network with high porosity, above 90%, enabling continuous water channels for efficient mass transfer. Theoretical modeling captures the complex nexus between microstructures and evaporation performance by coupling water transfer, thermal conduction, and vaporization enthalpy during evaporation. The mechanistic understanding and engineering tuning of the composites lead to an optimum configuration of NHSEs, which demonstrate a stable evaporation rate of 2.85 kg m-2 h-1 during continuous desalination in 20% brine. The outstanding performance of NHSEs and the underlying design principles may facilitate further development of practical desalination systems.A nanofibrous hydrogel with tunable microstructures and compositions is developed for solar desalination. The highly continuous microchannels in the hydrogels enable efficient mass transfer for stable solar desalination with an ultrahigh evaporation rate of 2.85 kg m-2 h-1 in 20% brine. General principles for the design of hydrogel evaporators are provided by understanding the nexus between microstructures vaporization performance.image


Persistent Identifierhttp://hdl.handle.net/10722/339547
ISSN
2023 Impact Factor: 18.5
2023 SCImago Journal Rankings: 5.496
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLi, H-
dc.contributor.authorZhang, WX-
dc.contributor.authorLiu, JW-
dc.contributor.authorSun, MZ-
dc.contributor.authorWang, L-
dc.contributor.authorXu, LZ-
dc.date.accessioned2024-03-11T10:37:31Z-
dc.date.available2024-03-11T10:37:31Z-
dc.date.issued2023-09-01-
dc.identifier.citationAdvanced Functional Materials, 2023, v. 33, n. 47-
dc.identifier.issn1616-301X-
dc.identifier.urihttp://hdl.handle.net/10722/339547-
dc.description.abstract<p>Hydrogel-based solar evaporators (HSEs) emerged as energy-efficient designs for water purification due to the reduced vaporization enthalpy in the hydrated polymeric network. However, it remains challenging for HSEs to achieve stable performance in desalination, partly due to the tradeoff between desired evaporation dynamics and salt tolerance. Here, composite hydrogels with tunable self-assembled nanofiber networks are exploited for the engineering of solar evaporators with both high evaporation performance and resistance to salt accumulation. The nanofibrous hydrogel solar evaporators (NHSEs) present an intrinsic open network with high porosity, above 90%, enabling continuous water channels for efficient mass transfer. Theoretical modeling captures the complex nexus between microstructures and evaporation performance by coupling water transfer, thermal conduction, and vaporization enthalpy during evaporation. The mechanistic understanding and engineering tuning of the composites lead to an optimum configuration of NHSEs, which demonstrate a stable evaporation rate of 2.85 kg m-2 h-1 during continuous desalination in 20% brine. The outstanding performance of NHSEs and the underlying design principles may facilitate further development of practical desalination systems.A nanofibrous hydrogel with tunable microstructures and compositions is developed for solar desalination. The highly continuous microchannels in the hydrogels enable efficient mass transfer for stable solar desalination with an ultrahigh evaporation rate of 2.85 kg m-2 h-1 in 20% brine. General principles for the design of hydrogel evaporators are provided by understanding the nexus between microstructures vaporization performance.image</p>-
dc.languageeng-
dc.publisherWiley-
dc.relation.ispartofAdvanced Functional Materials-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjecthydrogel evaporators-
dc.subjectnanofiber networks-
dc.subjectsalt resistance-
dc.subjectsolar desalination-
dc.subjectstructure-performance nexus-
dc.titleSelf-Assembled Nanofibrous Hydrogels with Tunable Porous Network for Highly Efficient Solar Desalination in Strong Brine-
dc.typeArticle-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1002/adfm.202308492-
dc.identifier.scopuseid_2-s2.0-85169301948-
dc.identifier.volume33-
dc.identifier.issue47-
dc.identifier.eissn1616-3028-
dc.identifier.isiWOS:001056067100001-
dc.publisher.placeWEINHEIM-
dc.identifier.issnl1616-301X-

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