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Tunable bulk material with robust and renewable superhydrophobicity designed via in-situ loading of surface-wrinkled microparticles


Liu, Shanqiu; Zhang, Xiaotian; Seeger, Stefan (2021). Tunable bulk material with robust and renewable superhydrophobicity designed via in-situ loading of surface-wrinkled microparticles. Chemical Engineering Journal, 408:127301.

Abstract

Superhydrophobic surfaces possess susceptibility towards mechanical and chemical damages as well as oil fouling, which limits their widespread use in practical applications. Here, we demonstrate a straightforward approach to fabricate tunable bulk material with robust and renewable superhydrophobicity by in-situ loading of interconnected surface-wrinkled microparticles. The bulk material shows mechanochemically robust superhydrophobicity across its whole 3D volume, features renewable superhydrophobicity after extremely chemical corrosion, and could regenerate its water repellency after oil contamination. The bulk material also features ultrahigh efficiency (~98%) in oil-water mixtures separation, due to its selective oil absorption capability from water. Notably, the mechanical performances, microstructures and density of the bulk material can be adjusted on demand by simply changing the amount of loaded microparticles. Compared to the pristine commercial melamine-formaldehyde based porous substrate (MFPS), the achieved bulk material shows up to ~230 folds increase in Young’s modulus, ~145 folds increase in flexure stress and ~25 folds increase in tensile stress. This strategy features great potential for designing lightweight structural materials with robust waterproof functionality as well as materials with efficient oil recovery capability from wastewater.

Abstract

Superhydrophobic surfaces possess susceptibility towards mechanical and chemical damages as well as oil fouling, which limits their widespread use in practical applications. Here, we demonstrate a straightforward approach to fabricate tunable bulk material with robust and renewable superhydrophobicity by in-situ loading of interconnected surface-wrinkled microparticles. The bulk material shows mechanochemically robust superhydrophobicity across its whole 3D volume, features renewable superhydrophobicity after extremely chemical corrosion, and could regenerate its water repellency after oil contamination. The bulk material also features ultrahigh efficiency (~98%) in oil-water mixtures separation, due to its selective oil absorption capability from water. Notably, the mechanical performances, microstructures and density of the bulk material can be adjusted on demand by simply changing the amount of loaded microparticles. Compared to the pristine commercial melamine-formaldehyde based porous substrate (MFPS), the achieved bulk material shows up to ~230 folds increase in Young’s modulus, ~145 folds increase in flexure stress and ~25 folds increase in tensile stress. This strategy features great potential for designing lightweight structural materials with robust waterproof functionality as well as materials with efficient oil recovery capability from wastewater.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Scopus Subject Areas:Physical Sciences > General Chemistry
Physical Sciences > Environmental Chemistry
Physical Sciences > General Chemical Engineering
Physical Sciences > Industrial and Manufacturing Engineering
Uncontrolled Keywords:Industrial and Manufacturing Engineering, General Chemistry, General Chemical Engineering, Environmental Chemistry
Language:English
Date:15 March 2021
Deposited On:27 Jan 2021 17:44
Last Modified:28 Jan 2021 21:01
Publisher:Elsevier
ISSN:1385-8947
OA Status:Closed
Publisher DOI:https://doi.org/10.1016/j.cej.2020.127301

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Content: Accepted Version
Language: English
Filetype: PDF - Registered users only until 15 March 2023
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Embargo till: 2023-03-15