Water-Based Peeling of Thin Hydrophobic Films

Physical Review Letters
Sepideh KhodaparastHoward A Stone

Abstract

Inks of permanent markers and waterproof cosmetics create elastic thin films upon application on a surface. Such adhesive materials are deliberately designed to exhibit water-repellent behavior. Therefore, patterns made up of these inks become resistant to moisture and cannot be cleaned by water after drying. However, we show that sufficiently slow dipping of such elastic films, which are adhered to a substrate, into a bath of pure water allows for complete removal of the hydrophobic coatings. Upon dipping, the air-water interface in the bath forms a contact line on the substrate, which exerts a capillary-induced peeling force at the edge of the hydrophobic thin film. We highlight that this capillary peeling process is more effective at lower velocities of the air-liquid interface and lower viscosities. Capillary peeling not only removes such thin films from the substrate but also transfers them flawlessly onto the air-water interface.

References

Feb 24, 2006·The European Physical Journal. E, Soft Matter·H Bodiguel, C Fretigny
May 16, 2007·Physical Review Letters·Charlotte PyCharles N Baroud
Aug 4, 2007·Science·Jiangshui HuangThomas P Russell
Mar 21, 2008·Nature·Mark A ShannonAnne M Mayes
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Sep 26, 2012·Physical Review Letters·O BäumchenK Dalnoki-Veress
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Jun 25, 2017·The European Physical Journal. E, Soft Matter·François BoulogneHoward A Stone

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Citations

Feb 26, 2020·Proceedings of the National Academy of Sciences of the United States of America·Yue ZhangBaoxing Xu
Mar 7, 2021·Polymers·Lucero M Hernandez-CedilloJorge L Domínguez-Juárez
Mar 26, 2021·Science Advances·Seo Woo SongJiyun Kim
Nov 18, 2021·Nano Letters·Jingcheng MaNenad Miljkovic

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