Results from Microgravity Experiments in the Facility for Adsorption and Surface Tension Studies (Fast) : Frequency-Domain and Time-Domain Surface Dilational Rheology Investigation (Abstract/Poster in atti di convegno)

Type
Label
  • Results from Microgravity Experiments in the Facility for Adsorption and Surface Tension Studies (Fast) : Frequency-Domain and Time-Domain Surface Dilational Rheology Investigation (Abstract/Poster in atti di convegno) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Alternative label
  • Loglio G.; Ferrari M.; Krägel J.; Liggieri L.; Makievski A. V.; Pandolfini P.; Ravera F. (2006)
    Results from Microgravity Experiments in the Facility for Adsorption and Surface Tension Studies (Fast) : Frequency-Domain and Time-Domain Surface Dilational Rheology Investigation
    in IACIS - 12th Conference on Surface and Colloid Science, Beijing, China
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Loglio G.; Ferrari M.; Krägel J.; Liggieri L.; Makievski A. V.; Pandolfini P.; Ravera F. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • IACIS - 12th Conference on Surface and Colloid Science (Beijing, China, 15-20 October 2006). (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
  • Oscillating and transient relaxation experiments at a fluid-fluid interface were performed by the FAST instrument (Facility for Adsorption and Surface Tension study), aboard the NASA Space Shuttle \"Columbia\", during the STS-107 mission (from January 16 to February 01, 2003). The aim of the FAST experiments was the investigation of the dynamics of adsorption of a soluble surfactant at the water/air and at the water/hexane interface, under microgravity conditions, that is, in absence of concomitant phenomena masking or disturbing the interfacial behaviour. The specific targets of the experiments were the following: a) to obtain reliable information about the mechanism of surfactant adsorption, b) to study the molecular diffusion process as a function of time, c) to determine the equilibrium thermodynamic properties at the interfacial phase. Moreover, a sequence of experiments was devised in order to investigate the relationship between interfacial responses in the time domain and in the frequency domain. In the poster presentation, in particular, we report representative examples for the interfacial behaviour in the low-frequency range and for the square-pulse responses to area disturbances. The data validate the Fourier-Transform relationship between surface relaxation (time domain) and harmonic oscillation (frequency domain), within the linearity response range. The conclusions focus the attention on the surface dilational modulus (i), i.e., the transfer function of the interfacial system governing all interfacial responses to surface forced perturbations. The experimental results allow us to definitely state that the above-mentioned physical quantity (i) is a constitutive property of the interfacial adsorption layers. (literal)
Titolo
  • Results from Microgravity Experiments in the Facility for Adsorption and Surface Tension Studies (Fast) : Frequency-Domain and Time-Domain Surface Dilational Rheology Investigation (literal)
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