Results 211 to 220 of about 16,419 (283)
Dynamic surface tension determination with the maximum bubble pressure method
Journal of Colloid and Interface Science, 1971 Abstract The surface tension of surfactant solutions can be observed conveniently as a function of time in the 1- to 100-sec range with some modifications of the normal maximum bubble pressure method. Dynamic surface tensions are compared with equilibrium values for dimethyldecylphosphine oxide, dimethyldodecylphosphine oxide, dimethyldodecylamine ...
Raymond L Bendure
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The maximum bubble pressure method of measuring surface tension, revisited
Colloids and Surfaces, 1990 Abstract The maximum bubble pressure method can give precise and accurate values of the equilibrium surface tension as well as of the dynamic surface tension at clearly defined bubble ages as given by the bubble intervals. Each bubble samples a fresh, substantially clean surface and the sensitivity can be mdyn cm−1.
Karol J. Mysels
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Studies of concentrated surfactant solutions using the maximum bubble pressure method
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2000 Abstract An analysis of the adsorption process during the deadtime period in maximum bubble pressure experiments is performed. The adsorption dynamics is calculated for the actual surface area increase of a bubble in a surfactant solution, which depends on characteristic system parameters such as the length and diameter of the capillary and the ...
Volodymyr I. Kovalchuk +4 more
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Dynamic surface tension of micellar solutions studied by the maximum bubble pressure method. 1. Experiment [PDF]
Colloid & Polymer Science, 1992 The effect of the micelles on the dynamic surface tension of micellar surfactant solutions is studied experimentally by means of the maximum bubble pressure method. Different frequencies of bubbling ranging approximately between 1 and 30 s−1 are applied. The time dependence of the surface tension is calculated using a dead time correction.
Ceco D. Dushkin, Tz. H. Iliev
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Adsorption kinetics at air/solution interface studied by maximum bubble pressure method
Colloid and Polymer Science, 2004 A general dynamic surface adsorption equation Γ(t) for maximum bubble pressure method was derived by solving Fick’s diffusion equation for the bubbles under different initial and boundary conditions. Different from the planar surface adsorption(Ward-Tordai equation), the derived dynamic surface adsorption Γ(t) for the short time consists of two terms ...
Ulf Messow, Junji Liu, Chuangye Wang
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The Surface Tension of Pure Zn Measured by Means of the Maximum Bubble Pressure Method
Surfaces and InterfacesThe authors acknowledge partial financial support from the "Ministerio de Economia y Competitividad" (Projects MAT2011-25029 and MAGNO - MAGnesium New Technological Opportunities, GRU-POANTOLIN-08Y) J.M. Molina wishes to thank the Universidad de Alicante (project GRE08-P13), the "Generalitat Valenciana" (Project GVPRE/2008/244) and also the "Ministerio
Ferri, J.M, Molina, J.M., Louis, E.
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Journal of Colloid and Interface Science, 1989 Abstract The maximum bubble pressure method for measuring dynamic surface tension is reexamined, using high speed cinematography, particularly with respect to the process of bubble formation and the determination of the true surface age. A method for direct measurement of the time of bubble growth is suggested which readily permits routine ...
Peter Robert Garrett, David R Ward
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Colloids and Surfaces, 1990 Abstract Industrial processes frequently use surfactants to lower liquid surface tension and promote wetting. In many instances, it is incorrect to apply the equilibrium (static) surface tension to predict the behavior of these processes because they operate under time-dependent (dynamic) conditions.
Robert K. Prud'homme +3 more
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