Surfactants and Superhydrophobic Surfaces (Abstract/Poster in atti di convegno)

Type
Label
  • Surfactants and Superhydrophobic Surfaces (Abstract/Poster in atti di convegno) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Alternative label
  • Ferrari M.; Ravera F.; Liggieri L. (2006)
    Surfactants and Superhydrophobic Surfaces
    in IACIS - 12th Conference on Surface and Colloid Science, Bijing - China
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Ferrari M.; Ravera F.; Liggieri L. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • IACIS - 12th Conference on Surface and Colloid Science (Bijing - China, 15-20 October 2006). (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
  • On superhydrophobic surfaces (contact angle with water greater than 150°), liquid drainage is enhanced with inhibition of adhesion phenomena: the small area shown when in contact with water make interactions in this environment usually strongly limited. The extreme hydrophobicity of a solid substrate is governed by chemical composition and geometrical structure of the surface including physico-chemical conditions acting from micro to nanoscale affecting the organisation of material at the interface and its relationship with wetting phenomena. Adsorption of amphiphilic molecules at solid surfaces often results in the self-assembly into ordinate patterns under parameters like concentration, temperature and ionic strength affecting the shape and the periodic structure. Surfactant solutions are usually expected to show strong wetting properties and in this work it has been investigated the effect of the chemical composition of water solutions in terms of chain length and class of amphiphiles like SDS, phosphine oxides and CiEjs on superhydrophobic surfaces prepared by an original methodology based on a mixed inorganic-organic coating in a multistep procedure. The behaviour in liquid-liquid environment has been also studied with the role played by the partition coefficient on the contact angle at water-oil interface. The presence of surfactants is then effective in lowering the contact angle in a hydrophobic or still superhydrophobic range. The reduced area in contact with the solid surface allows a limitation of adsorbing area available and then the spreading will be controlled in a very finite space with surfactants acting as a switch from a Cassie to a Wenzel substrate. (literal)
Titolo
  • Surfactants and Superhydrophobic Surfaces (literal)
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