Surface Rheology Investigation of the 2-D Phase Transition in n-Dodecanol Monolayers at the Water-Air Interface (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Surface Rheology Investigation of the 2-D Phase Transition in n-Dodecanol Monolayers at the Water-Air Interface (Articolo in rivista) (literal)

Anno

• 2003-01-01T00:00:00+01:00 (literal)

Alternative label

• Libero Liggieri, Francesca Ravera, Michele Ferrari (2003)
  Surface Rheology Investigation of the 2-D Phase Transition in n-Dodecanol Monolayers at the Water-Air Interface
  in Langmuir
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Libero Liggieri, Francesca Ravera, Michele Ferrari (literal)

Pagina inizio

• 10233 (literal)

Pagina fine

• 10240 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni

• Pubblicato su Langmuir I.F.3.248 Partially supported by the European Space Agency under the MAP project “Fundamental and Applied Studies in Emulsion Stabilitys FASES” (AO-99-052). (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 19 (literal)

Rivista

• Langmuir (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto

• The rheological properties of a liquid surface play an important role in many industrial and biophysical processes such as extension and contraction of lung alveolus, inkjet printing, liquid-liquid extraction, emulsification, foaming. Sodium dodecyl sulfate (SDS) is one of the most known surfactants, largely utilized for model studies and in practical applications, mainly foaming. n-Dodecanol is one of the most important impurities present in SDS, which it has been shown to play an important effect in increasing the surface activity of SDS solutions and in the stabilsation of foams. This is is due to the tendency of n-dodecanol to form 2-D aggregates passed a critical surface coverage. Here the surface rheological properties of n-dodecanol adsorbed layers are correlated with the observed 2-D phase transitions. A suitable model allows the kinetics features of the aggregation to be characterised. (literal)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• CNR, Istituto per l’Energetica e le Interfasi, Sezione di Genova via De Marini 6, 16149 Genova, Italy (literal)

Titolo

• Surface Rheology Investigation of the 2-D Phase Transition in n-Dodecanol Monolayers at the Water-Air Interface (literal)

Abstract

• n-Dodecanol is the last even linear chain alkanol soluble in water. Owing to this feature, previous investigations have shown in n-dodecanol monolayers at the water-air interface the existence of 2-D phase transitions, resulting in the formations of large molecular aggregates beyond a critical surface pressure. Here the rheological properties of this adsorption layer have been investigated in relation with the appearance of these phase transitions. To this aim, the surface dilational viscoelasticity has been measured as a function of the surface pressure by a specific oscillating drop procedure implemented on a pendant drop tensiometer. Different oscillation frequencies were investigated. The results show that the module and phase of the dilational viscoelasticity exhibit specific features that can be correlated to the different stages of the formation of a continuous liquidlike layer at an interface initially void from surfactant. In the regions of the gaslike 2-D phase the results agree with the prediction of the generalized Volmer model, which was already applied to interpret the equilibrium properties. In the region of coexistence between gaseous and liquid phases, just beyond the critical surface pressure, a model accounting for the presence of the aggregation process, previously developed by the authors, has suitably been applied to interpret the data. The comparison of the measured data with the model prediction allows the rate constants and other features of the aggregation process to be accessed. (literal)

Prodotto di

• Institute of Condensed Matter Chemistry and Energy Technologies (ICMATE) (Istituto)

Autore CNR

• FRANCESCA RAVERA (Unità di personale interno)
• LIBERO LIGGIERI (Unità di personale interno)
• MICHELE FERRARI (Persona)

Insieme di parole chiave

• Keywords of "Surface Rheology Investigation of the 2-D Phase Transition in n-Dodecanol Monolayers at the Water-Air Interface" (Insieme di parole chiave)

Incoming links:

Autore CNR di

• MICHELE FERRARI (Persona)
• FRANCESCA RAVERA (Unità di personale interno)
• LIBERO LIGGIERI (Unità di personale interno)

Prodotto

• Institute of Condensed Matter Chemistry and Energy Technologies (ICMATE) (Istituto)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Langmuir (Rivista)

Insieme di parole chiave di

• Keywords of "Surface Rheology Investigation of the 2-D Phase Transition in n-Dodecanol Monolayers at the Water-Air Interface" (Insieme di parole chiave)