Results 251 to 260 of about 155,194 (319)
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.
Tz. Iliev, Ceco D. Dushkin
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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 ...
N. A. Mishchuk +4 more
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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 ...
Junji Liu, Wang Chuang-ye, Ulf Messow
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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
José Miguel Ferri Azor +2 more
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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 R. Garrett, David 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.
Douglas E. Hirt +3 more
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Heat Transfer: Volume 1, 2003 Surfactant solution systems are encountered in many different applications, including as a method to enhance the nucleate boiling performance of water. Characterizing the attendant interfacial phenomena requires precise predictions of their surface tension relaxation behavior.
Manish Bahl +2 more
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Journal of Colloid Science, 1961 Abstract A method is presented for the use of the maximum bubble pressure method of measuring surface tension, to measure dynamic surface tensions of solutions of slowly diffusing soluble molecules. Data obtained using this method on aqueous solutions of decanoic acid and decyl alcohol are also presented.
Roy J. Kuffner
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Langmuir, 2006 Here, based on the theoretical analysis of results for two ionic surfactants, sodium dodecyl sulfate (SDS) and dodecyl trimethylammonium bromide (DTAB), we develop a new approach for quantitative interpretation of data from the maximum bubble pressure method.
Nikolay C. Christov +4 more
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Measurement of the surface tension of electrolytic copper by the maximum gas bubble pressure method
Bulletin of the Academy of Sciences, USSR Division of Chemical Science, 1964 1. The surface tension of electrolytic copper at 1600° has been measured and found to be 1230 dyne/cm. 2. The possibility has been shown of experimentally confirming the correctness of the use of external radii in calculating a from Cantor's formula or from Sugden's formula in the investigation of non-wetting liquids.
V. I. Yashkichev, V.B. Lazarev
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