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231226s2022 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.1c03492
|2 doi
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|a pubmed25n1129.xml
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|a eng
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|a Anbazhagan, Rajeshkumar
|e verfasserin
|4 aut
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|a Fluorine-Free Superhydrophobic Covalent-Organic-Polymer Nanosheet Coating for Selective Dye and Emulsion Separation
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|c 2022
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Revised 12.04.2022
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Covalent organic polymer nanosheets (COPNs) endowed with porous networks and large surface areas in their structures offer great advantages over other materials in addressing environmental problems. In this study, fluorine-free superhydrophobic COPNs were designed and applied to selective dye absorption. Notably, COPNs selectively adsorb dyes with a high hydrophobic index (HI) and reject low HI dyes with maximum adsorption capacities of 361 and 263 mg/g for crystal violet and methylene blue, respectively. The adsorption isotherm model showed that the COPNs follow the Langmuir adsorption isotherm model and pseudo-second-order kinetics. Next, we explored the superhydrophobicity of the COPNs by in situ fabrication with melamine sponge (COPNs-MS), which incorporates the superhydrophobicity of COPNs [water contact angle (WCA) of >150°] with the structure and flexibility of the MS skeleton. The COPNs-MS shows various oil-adsorbing properties with good adsorption capacity (from 60 to 120 g/g) and also effectively separates various surfactant-stabilized emulsions with a separation efficiency of over 99%. The as-fabricated COPNs-MS retains its superhydrophobicity in various solvents and hazardous conditions (WCA ≥ 150°) and exhibits good flame retardancy and excellent compression properties with excellent antifouling property due to the superhydrophobic COPN coating. Furthermore, COPNs-MS also demonstrates excellent recyclability because the strong COPN coating in the MS skeleton retains its hydrophobicity. Therefore, our fluorine-free superhydrophobic COPNs are not only capable of selective dye adsorption but also exhibit very good oil adsorption and surfactant-stabilized emulsion separation performance
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|a Journal Article
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|a Krishnamoorthi, Rajakumari
|e verfasserin
|4 aut
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|a Thankachan, Darieo
|e verfasserin
|4 aut
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|a Van Dinh, Thi Thuy
|e verfasserin
|4 aut
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|a Wang, Chih-Feng
|e verfasserin
|4 aut
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|a Yang, Jen Ming
|e verfasserin
|4 aut
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|a Chang, Yen-Hsiang
|e verfasserin
|4 aut
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|a Tsai, Hsieh-Chih
|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 38(2022), 14 vom: 12. Apr., Seite 4310-4320
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnas
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| 773 |
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|g volume:38
|g year:2022
|g number:14
|g day:12
|g month:04
|g pages:4310-4320
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|u http://dx.doi.org/10.1021/acs.langmuir.1c03492
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