Results 211 to 220 of about 18,610 (263)
Some of the next articles are maybe not open access.
Studies of concentrated surfactant solutions using the maximum bubble pressure method
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2000Abstract 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 ...
Mishchuk, N. +4 more
openaire +2 more sources
The measurement of dynamic surface tension by the maximum bubble pressure method
Colloid & Polymer Science, 1994The principle of maximum pressure in a bubble for measurements of dynamic surface tension is realized in a fully automatically operating apparatus. The set-up yields data in the time interval from 1 ms up to several seconds and can be temperature controlled from 5° to 80°C.
Fainerman, V., Miller, R., Joos, P.
openaire +2 more sources
A test of the maximum bubble pressure method for electrocapillary measurements
Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1987Abstract The reliability of the maximum bubble pressure method for electrocapillary measurements has been tested in aqueous and non-aqueous solutions. The results suggest that, although contact angle problems are actually eliminated by using this method, serious systematic errors may be observed.
P. Nikitas, A. Pappa-Louisi
openaire +1 more source
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
openaire +2 more sources
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
openaire +2 more sources
Surface tension measurement of oil/refrigerant mixture by maximum bubble pressure method
International Journal of Refrigeration, 2017Abstract Lubrication oil used in refrigerant compressors forms oil mist in the compressor shell. Some of the oil mist is discharged into a refrigeration cycle with refrigerant and causes degradation of heat transfer in heat exchangers. Since the generation of the oil mist is related to the Weber number, it is necessary to measure the surface tension ...
Mitsuhiro Fukuta +3 more
openaire +1 more source
Adsorption kinetics at air/solution interface studied by maximum bubble pressure method
Colloid and Polymer Science, 2004A 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, Chuangye Wang, Ulf Messow
openaire +1 more source
The maximum bubble pressure method of measuring surface tension, revisited
Colloids and Surfaces, 1990Abstract 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.
openaire +1 more source
Unusual Characteristics of the Maximum Bubble Pressure Method Using a Teflon Capillary
Journal of Colloid and Interface Science, 1994Abstract The maximum bubble pressure method has been used recently in a continuous-bubbling mode to measure the dynamic surface tension of surfactant solutions at varying bubble frequencies. A modification of this method, which utilizes a syringe pump supplying gas at controlled rates, has been developed to examine bubble growth by providing an ...
Cheryl P. Hallowell, Douglas E. Hirt
openaire +1 more source
Dynamic surface tension determination with the maximum bubble pressure method
Journal of Colloid and Interface Science, 1971Abstract 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 ...
openaire +1 more source
Dynamic surface tension of micellar solutions studied by the maximum bubble pressure method
Colloid and Polymer Science, 1995A theoretical model for the dynamic surface tension of an air bubble expanding in micellar surfactant solution is proposed. The model accounts for the effect of expansion of the bubble surface during the adsorption of surfactant molecules (monomers) and the effect of disintegration of polydisperse micelles on the surfactant diffusion.
C. D. Dushkin +2 more
openaire +1 more source