title: Two-liquid wetting properties as a surface polarity probe for hydrophobic coatings.
abstract: A model for the spreading of a non-polar liquid on a surface within a polar medium is described theoretically, according to Fowkes, Good and Girifalco approximations on interfacial tension. We demonstrate both theoretically and experimentally that surface polarity measurements using the contact angle of two immiscible liquids minimize drastically the measurement error. The present method has been successfully applied to various substrates of variable polarity and overall surface energy. We also demonstrate that this method allows a direct measurement of surface sensitivity to pH.
authors.affiliation: Varioptic, Parrot SA Bâtiment Tony Garnier, 24 rue Jean Baldassini, 69007 Lyon, France. mathieu.maillard@univ-lyon1.fr and Université de Lyon, Laboratoire des Multimatériaux et Interfaces, UMR 5615, CNRS-Université Lyon 1 43 bd du 11 Novembre 1918, F-69622 Villeurbanne, France.
authors.forename: G
authors.initials: G
authors.lastname: Bonfante
authors.affiliation: Varioptic, Parrot SA Bâtiment Tony Garnier, 24 rue Jean Baldassini, 69007 Lyon, France. mathieu.maillard@univ-lyon1.fr.
authors.forename: S
authors.initials: S
authors.lastname: Chevalliot
authors.affiliation: Université de Lyon, Laboratoire des Multimatériaux et Interfaces, UMR 5615, CNRS-Université Lyon 1 43 bd du 11 Novembre 1918, F-69622 Villeurbanne, France.
authors.forename: B
authors.initials: B
authors.lastname: Toury
authors.affiliation: Varioptic, Parrot SA Bâtiment Tony Garnier, 24 rue Jean Baldassini, 69007 Lyon, France. mathieu.maillard@univ-lyon1.fr.
authors.forename: B
authors.initials: B
authors.lastname: Berge
authors.affiliation: Varioptic, Parrot SA Bâtiment Tony Garnier, 24 rue Jean Baldassini, 69007 Lyon, France. mathieu.maillard@univ-lyon1.fr.
authors.forename: M
authors.identifier: http://orcid.org/0000-0001-7290-2925
authors.initials: M
authors.lastname: Maillard