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Is superhydrophobicity equal to underwater superoleophilicity? Hydrophilic wetting defects on a superhydrophobic matrix with switchable superdewetting in both air and water
Department固体润滑国家重点实验室(LSL)
Yihan Sun1,3; Jinxia Huang1; Zhiguang Guo1,2; Wermin Liu1
The second department仿生摩擦学
2020-12
Source PublicationJournal of Materials Chemistry A
Issue9Pages:1471
Abstract

Notoriously, a superhydrophobic surface always shows underwater superoleophilic behaviour in aqueous environments. However, a question remains unanswered: is superhydrophobicity equal to underwater superoleophilicity? Gaps of understanding still exist between such two extreme wetting states. Herein, beyond the thermodynamic contradiction, a well-defined porous coating integrating a simultaneous in-air superhydrophobic and underwater superoleophobic state can be realized via the rational incorporation of hydrophilic microscale defects on a superhydrophobic matrix. In contrast, a predictable underwater superoleophilic state is observed on the pristine superhydrophobic surface with completely hydrophobic surface chemistry. We underline how the hydrophilic defects regulate the underwater oil wetting and in-air water repellence simultaneously, and the superhydrophobic surface is not simply equal to the underwater superoleophilic surface. On the basis of understanding the underlying mechanism, the separation of light oil–water mixtures and surfactant-stabilized oil-in-water emulsions can be achieved using the defective superhydrophobic surface. Such findings could shed light on understanding repellence/penetration behaviours at a three phase contact line and accelerating the realization of opposite wetting states without any external stimulus.

If11.301
Language英语
compositor第一作者单位
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.licp.cn/handle/362003/27320
Collection固体润滑国家重点实验室(LSL)
Corresponding AuthorJinxia Huang; Zhiguang Guo
Affiliation1.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics,
2.Ministry of Education Key Laboratory for the Green Preparation and Application of
3.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
Recommended Citation
GB/T 7714
Yihan Sun,Jinxia Huang,Zhiguang Guo,et al. Is superhydrophobicity equal to underwater superoleophilicity? Hydrophilic wetting defects on a superhydrophobic matrix with switchable superdewetting in both air and water[J]. Journal of Materials Chemistry A,2020(9):1471.
APA Yihan Sun,Jinxia Huang,Zhiguang Guo,&Wermin Liu.(2020).Is superhydrophobicity equal to underwater superoleophilicity? Hydrophilic wetting defects on a superhydrophobic matrix with switchable superdewetting in both air and water.Journal of Materials Chemistry A(9),1471.
MLA Yihan Sun,et al."Is superhydrophobicity equal to underwater superoleophilicity? Hydrophilic wetting defects on a superhydrophobic matrix with switchable superdewetting in both air and water".Journal of Materials Chemistry A .9(2020):1471.
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