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250714s2025 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.5c01734
|2 doi
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|a eng
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|a Li, Shuo
|e verfasserin
|4 aut
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|a Dual-Bioinspired Janus Membranes with Asymmetric Superwettability for High-Efficiency Oil-Water Separation and Environmental Remediation
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|c 2025
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|a Text
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Revised 23.05.2025
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|a published: Print-Electronic
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|a Citation Status Publisher
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|a The escalating discharge of petroleum-based contaminants and industrial organic pollutants poses significant threats to global ecosystems and human health, necessitating urgent advancements in sustainable water remediation technologies. To address this challenge, a rationally engineered Janus membrane with asymmetric superwettability was presented, synthesized through a dual-bioinspired fabrication strategy. The membrane was developed via selective surface etching of stainless steel mesh (SSM) substrates using laser etching power gradients, followed by hierarchical functionalization. On the high-power-etched surface, polydimethylsiloxane (PDMS) curing replicated the lotus leaf microstructure, yielding superhydrophobicity (water contact angle: 157.8°). Conversely, the low-power-etched surface was functionalized with chitosan and phytanic acid, hydrophilic modifiers, to emulate the hydrous properties of fish scales, achieving superhydrophilicity with underwater-oil contact angles >148.2°. The resultant PDMS/SSM/CS-PA Janus membrane demonstrated exceptional separation efficiencies (>99.90%) for both oil-in-water and water-in-oil mixtures, coupled with robust cyclic stability (>99.80% efficiency after 50 cycles). Mechanistic analysis revealed that the asymmetric wettability gradient and biomimetic micro/nanoscale architectures synergistically enhanced selective permeation of oil-water mixtures. This work establishes a novel paradigm for designing high-efficient separation materials with potential applications in industrial wastewater treatment and environmental remediation
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|a Journal Article
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|a Zhang, Tianze
|e verfasserin
|4 aut
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|a Chen, Guopeng
|e verfasserin
|4 aut
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| 700 |
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|a Chen, Fengxiang
|e verfasserin
|4 aut
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|a Xie, Shangzhen
|e verfasserin
|4 aut
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| 700 |
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|a Guo, Zhiguang
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1985
|g (2025) vom: 23. Mai
|w (DE-627)NLM098181009
|x 1520-5827
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|g year:2025
|g day:23
|g month:05
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|u http://dx.doi.org/10.1021/acs.langmuir.5c01734
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