Shear viscosity of polymer and surfactant monolayers |
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| Authors: | C. Barentin P. Muller C. Ybert J.-F. Joanny J.-M. di Meglio |
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| Affiliation: | (1) Institut Charles Sadron (CNRS UPR022), 6 rue Boussingault, 67083 Strasbourg Cedex, France, FR |
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| Abstract: | The surface shear viscosity of monolayers formed at the surface of water by adsorbed polyethyl- eneoxyde and by stearic acid is measured as a function of the surface pressure of the monolayer using a new surface viscometer. The principle of the viscometer is the measurement of the drag force on a circular disk undergoing a uniform translation at the water surface: a hydrodynamic model based on the lubrication approximation allows a calculation of the surface viscosities from the absolute measurement of the drag forces. Received: 26 August 1999 |
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| Keywords: | PACS. 68.10.Et Interface elasticity, viscosity, and viscoelasticity - 83.50.Lh Interfacial and free surface flows slip |
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