title: Slippery Liquid-Immobilized Coating Films Using in Situ Oxidation-Reduction Reactions of Metal Ions in Polyelectrolyte Films.
abstract: We fabricated slippery liquid-immobilized coating (SLIC) films by reacting a slippery liquid (polymethylhydrosiloxane) near the surface of a polyelectrolyte film containing silver ions prepared by the layer-by-layer method. The obtained films maintained their slipperiness after chemical and physical treatments, in contrast to slippery liquid-infused porous surfaces. The high chemical and physical stabilities of the films were attributable to gelation and immobilization of the lubricant owing to an oxidation-reduction reaction with subsequent dehydration condensation of Si-OH on the outer surface of the polyelectrolyte film and the bonding of Si-H with NH2groups within the polyelectrolyte film, respectively. Moreover, the SLIC films exhibited a high degree of slipperiness with respect to low-surface-tension liquids. To the best of our knowledge, this technique of lubricant immobilization using silver ions has not been reported previously. The films should be suitable for use in various applications where contamination must be prevented under extreme conditions, such as those requiring high physical durability and organic solvent use.
authors.affiliation: Department of Integrated Design Engineering, Faculty of Science and Technology, Keio University , 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan.
authors.forename: Yosuke
authors.identifier: http://orcid.org/0000-0002-1072-5094
authors.initials: Y
authors.lastname: Tsuge
authors.affiliation: Department of Integrated Design Engineering, Faculty of Science and Technology, Keio University , 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan.
authors.forename: Takeo
authors.initials: T
authors.lastname: Moriya
authors.affiliation: Department of Integrated Design Engineering, Faculty of Science and Technology, Keio University , 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan.
authors.forename: Yukari
authors.initials: Y
authors.lastname: Moriyama
authors.affiliation: Department of Integrated Design Engineering, Faculty of Science and Technology, Keio University , 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Tokura
authors.affiliation: Department of Integrated Design Engineering, Faculty of Science and Technology, Keio University , 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan.
authors.forename: Seimei
authors.identifier: http://orcid.org/0000-0001-9807-3555
authors.initials: S
authors.lastname: Shiratori
keywords: durability; immobilization; layer-by-layer assembly; oxidation−reduction; slippery surfaces