Molecular orientation as a controlling process in adsorption dynamics (Articolo in rivista)

Type
Label
  • Molecular orientation as a controlling process in adsorption dynamics (Articolo in rivista) (literal)
Anno
  • 2000-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/S0927-7757(00)00504-5 (literal)
Alternative label
  • Francesca Ravera, Libero Liggieri, Reinhard Miller (2000)
    Molecular orientation as a controlling process in adsorption dynamics
    in Colloids and surfaces. A, Physicochemical and engineering aspects (Print); Elsevier, Amsterdam (Paesi Bassi)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Francesca Ravera, Libero Liggieri, Reinhard Miller (literal)
Pagina inizio
  • 51 (literal)
Pagina fine
  • 60 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 175 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto di Chimica Fisica Applicata dei Materiali-CNR, via De Marini 6, I-16149 Genova, Italy Max Plank Institut fur Kolloid und Grenzflachenforschung, Max-Planck-Campus, D-14476 Golm, Germany (literal)
Titolo
  • Molecular orientation as a controlling process in adsorption dynamics (literal)
Abstract
  • The formation of a surfactant adsorption layer at the liquid/fluid interface is basically described by a diffusion controlled adsorption. When adsorbed molecules undergo changes in their molecular interfacial orientation, the adsorption rate can also change simulating another adsorption mechanism. A generalised model is presented which takes into consideration both the transport of surfactant in the bulk phase by diffusion and rate equations describing the different steps of molecular arrangement at the interface: adsorption/desorption fluxes and the process of reorientation. The most general case results when the characteristic times of all three processes are of the same order of magnitude. Model calculations are used to estimate the effect of the three characteristic times: diffusion relaxation time, transfer rate constant, and reorientation rate constant. Moreover, the influence of the involved physical parameter on the dynamic surface pressure is analysed. (literal)
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