Facility for adsorption and surface tension studies (FAST) on board of shuttle STS-107 mission: Determination of the surface dilational modulus as a function of concentration and temperature for aqueous solutions of dodecyl-dimethyl-phosphine-oxide, in the 0.01–0.32 Hz frequency range |
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Authors: | Giuseppe Loglio Piero Pandolfini Reinhard Miller Alexander Makievski Jürgen Krägel Libero Liggieri Francesca Ravera Michele Ferrari Alberto Passerone |
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Affiliation: | 1. Department of Organic Chemistry, University of Florence, Via della Lastruccia 13, 50019, Sesto Fiorentino, Florence, Italy 2. Max-Planck Institut für Kolloid- und Grenzfl?chenforschung, 14467, Postdam / Golm, Germany 3. CNR - Istituto per l’Energetica e le Interfasi Sezione di Genova, 16149, Genoa, Italy
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Abstract: | Measurements of dynamic-surface-tension responses to harmonic surface perturbations, in the low-frequency range, are reported for aqueous solutions of n-dodecyl-dimethyl-phosphine-oxide. From the primary observed results of the steady-state surface oscillation behaviour, the inherent surface dilational modulus is determined at different frequencies, at various concentrations up to the critical micellar concentration and at three temperatures (i.e., at T=15, 25 and 35 °C). The obtained experimental values are successfully interpreted in terms of the diffusion-controlled model. The experiments grant reliable information about the constitutive dynamic properties of air-liquid single interfaces. |
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