title: Tensiometric Characterization of Superhydrophobic Surfaces As Compared to the Sessile and Bouncing Drop Methods.
abstract: We have considered in this work the Wilhelmy plate tensiometer to characterize the wetting properties of two model surface textures: (i) a series of three superhydrophobic micropillared surfaces and (ii) a series of two highly water-repellent surfaces microtextured with a femtosecond laser. The wetting forces obtained on these surfaces with the Wilhelmy plate technique were compared to the contact angles of water droplets measured with the sessile drop technique and to the bouncing behavior of water droplets recorded at a high frame rate. We showed that it is possible with this technique to directly measure triple-line anchoring forces that are not accessible with the commonly used sessile drop technique. In addition, we have demonstrated on the basis of the bouncing drop experiments wetting transitions induced by the specific test conditions associated with the Wilhelmy plate tensiometer for the two series of textured surfaces. Finally, the tensiometer technique is proposed as an alternative test for characterizing the wetting properties of highly liquid-repellent surface, especially under immersion conditions.
authors.affiliation: Institut de Science des Matériaux de Mulhouse (IS2M) CNRS - UMR 7361, Université de Haute Alsace , 15 rue Jean Starcky BP2488, 68057 Mulhouse, France.
authors.forename: Valentin
authors.initials: V
authors.lastname: Hisler
authors.affiliation: Institut de Science des Matériaux de Mulhouse (IS2M) CNRS - UMR 7361, Université de Haute Alsace , 15 rue Jean Starcky BP2488, 68057 Mulhouse, France.
authors.forename: Hiba
authors.initials: H
authors.lastname: Jendoubi
authors.affiliation: IREPA-LASER, Boulevard Gonthier d'Andernach, Parc d'Innovation, 67400 Illkirch-Graffenstaden, France.
authors.forename: Camille
authors.initials: C
authors.lastname: Hairaye
authors.affiliation: Institut de Science des Matériaux de Mulhouse (IS2M) CNRS - UMR 7361, Université de Haute Alsace , 15 rue Jean Starcky BP2488, 68057 Mulhouse, France.
authors.forename: Laurent
authors.initials: L
authors.lastname: Vonna
authors.affiliation: Institut Charles Sadon (ICS) (UPR22-CNRS), Université de Strasbourg , 23 rue du Loess BP 84047, 67034 Strasbourg, France.
authors.forename: Vincent
authors.initials: V
authors.lastname: Le Houérou
authors.affiliation: IREPA-LASER, Boulevard Gonthier d'Andernach, Parc d'Innovation, 67400 Illkirch-Graffenstaden, France.
authors.forename: Frédéric
authors.initials: F
authors.lastname: Mermet
authors.affiliation: Institut de Science des Matériaux de Mulhouse (IS2M) CNRS - UMR 7361, Université de Haute Alsace , 15 rue Jean Starcky BP2488, 68057 Mulhouse, France.
authors.forename: Michel
authors.initials: M
authors.lastname: Nardin
authors.affiliation: Institut de Science des Matériaux de Mulhouse (IS2M) CNRS - UMR 7361, Université de Haute Alsace , 15 rue Jean Starcky BP2488, 68057 Mulhouse, France.
authors.forename: Hamidou
authors.initials: H
authors.lastname: Haidara