zhou-novelwaterharvesting-2019.pdf (2.79 MB)
Novel water harvesting fibrous membranes with directional water transport capability
journal contribution
posted on 2019-03-08, 00:00 authored by J Wu, Hua Zhou, Hong Wang, Hao Shao, G Yan, Tong Lin© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Previous studies about water harvesting from airborne moisture, which is driven by a directional water transport principle, are based on either a 2D surface or a 1D filament. Porous membranes with a directional water transport capability are seldom used for water harvesting. Herein, a novel hydrophobic/hydrophilic directional-wicking nanofibrous membrane is reported showing enhanced water harvesting ability. In comparison to the hydrophobic or hydrophilic membranes of the same structure and dimension, the directional wicking fibrous membranes have much higher water harvesting capacity. This fantastic water harvesting capability is originated from strong force to draw water from the hydrophobic to the superhydrophilic layer and ever permeable channels formed by the hydrophobic fibrous structure. Larger pores in the hydrophobic layer and smaller pores in the superhydrophilic layer facilitate water harvesting because of the enhanced directional wicking ability. The variation in pore dimension between the hydrophobic and the hydrophilic layers can result in 1.7 times difference in water harvesting capacity. These novel understandings may be useful for the development of advanced water harvesters for various applications.
History
Journal
Advanced materials interfacesVolume
6Issue
5Article number
1801529Publisher
WileyLocation
Chichester, Eng.Publisher DOI
Link to full text
eISSN
2196-7350Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2019, WILEY-VCH Verlag GmbH & CoUsage metrics
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No categories selectedKeywords
Science & TechnologyPhysical SciencesTechnologyChemistry, MultidisciplinaryMaterials Science, MultidisciplinaryChemistryMaterials Sciencedirectional wickingelectrospinningfibrous membranehydrophobicsuperhydrophilicPOLYACRYLONITRILE NANOFIBERSDROP IMPACTWETTABILITYSURFACESTABILIZATIONCAPTUREPOLYMERFIBERSFILMPENETRATION
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