Controlling water adhesion on superhydrophobic surfaces with bi-functional polymers

Arisawa, Daiki; Umetsu, Yasushi; Yoshizawa, Atsushi; Hill, Christopher; Eastoe, Julian; Guittard, Frédéric; Darmanin, Thierry; Sagisaka, Masanobu

doi:10.1016/j.colsurfa.2021.126307

Cited by 5 publications

(2 citation statements)

References 47 publications

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“…8 The solid−liquid contact area gradually shrinks as the CA of the surface increases; if the three-phase contact line is not easily deformed, it will be more conducive to the droplet sliding on the solid surface. 9,10 When the surface microstructure makes the three-phase contact line continuous, the three-phase contact line is pinned more times, which is likely to cause large-scale deformation of the three-phase contact line. The droplet needs to overcome a large energy barrier to sliding and is easy to adhere to the surface.…”

Section: ■ Introductionmentioning

confidence: 99%

“…When the droplet is just about to slide, only the liquid molecules at the three-phase contact line are in motion, while the liquid molecules at other positions on the solid–liquid contact interface do not occur in motion. , The three-phase contact line of the droplet will vary with the surface microstructure and is divided into two states: continuous and discontinuous . The solid–liquid contact area gradually shrinks as the CA of the surface increases; if the three-phase contact line is not easily deformed, it will be more conducive to the droplet sliding on the solid surface. , When the surface microstructure makes the three-phase contact line continuous, the three-phase contact line is pinned more times, which is likely to cause large-scale deformation of the three-phase contact line. The droplet needs to overcome a large energy barrier to sliding and is easy to adhere to the surface.…”

Section: Introductionmentioning

confidence: 99%

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Prediction of Droplet Sliding on the Continuity of the Three-Phase Contact Line

Qiu

Chen

Di³

et al. 2021

Langmuir

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Many animals and plants have evolved wonderful hydrophobic abilities to adapt to the complex climate environment. The microstructure design of a superhydrophobic surface focuses on bionics and will be restricted by processing technology. Although certain functions can be achieved, there is a lack of unified conclusion on the wetting mechanism and a few quantitative analyses of the continuity of the three-phase contact line. Therefore, the relationship between the surface microstructure of the lattice pattern and the critical sliding angle of the water droplet in the Cassie state was investigated in this paper, and we proposed a method to quantitatively analyze the continuity of the three-phase contact line by a dimensionless length f. The results showed that the three-phase contact line was an important factor to determine the sliding performance of the droplet. The upward traction force generated by the surface tension through the force analysis on the three-phase contact line can enhance the sliding ability of the droplet on the solid surface. There was a good negative linear correlation between the critical sliding angle and dimensionless length, which provided a guiding basis for the optimal design of superhydrophobic surfaces.

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Section: ■ Introductionmentioning

confidence: 99%