title: Fabrication of superhydrophobic PDMS surfaces by combining acidic treatment and perfluorinated monolayers.
abstract: In this paper, polydimethylsiloxane (PDMS) with a superhydrophobic surface was generated by the combination of an acid corrosion followed by the covalent grafting of a highly fluorinated monolayer. The acid corrosion was performed with H2SO4 or HF, and the more effective was concentrated H2SO4. The resulting surface had a contact angle with water of 135 degrees. All the acid-treated samples were then functionalized by the covalent grafting of triethoxyaminopropylsilane followed by the reaction with semifluorinated acid chlorides, via the formation of an amide bond, or directly by a commercially available highly fluorinated silane, 1H,1H,2H,2H-perfluorodecyltriethoxysilane, to afford superhydrophobic surfaces (contact angle with water exceeding 160 degrees). The introduction of an amide function in the fluorinated monolayer afforded the best water repellency properties probably due to the organization induced by H-bonding between the surface grafted molecules.
authors.affiliation: Université de Nice-Sophia Antipolis, Laboratoire de Chimie des Matériaux Organiques et Métalliques (CMOM), Institut de Chimie de Nice, Equipe Chimie Organique aux Interfaces, Parc Valrose, 06108 Nice Cedex 2, France.
authors.forename: Elisabethpatricia Taffin
authors.initials: ET
authors.lastname: de Givenchy
authors.forename: Sonia
authors.initials: S
authors.lastname: Amigoni
authors.forename: Cédric
authors.initials: C
authors.lastname: Martin
authors.forename: Guillaume
authors.initials: G
authors.lastname: Andrada
authors.forename: Laurent
authors.initials: L
authors.lastname: Caillier
authors.forename: Serge
authors.initials: S
authors.lastname: Géribaldi
authors.forename: Frédéric
authors.initials: F
authors.lastname: Guittard