Surface tensions of nonideal mixtures of fluorocarbons and hydrocarbons and their interfacial tensions against water

1981 ◽  
Vol 85 (25) ◽  
pp. 3916-3920 ◽  
Author(s):  
Tetsurou Handa ◽  
Pasupati Mukerjee
Keyword(s):  
Surface Tensions ◽  
Interfacial Tensions ◽  
Nonideal Mixtures

scholarly journals Surface and interfacial tensions of aqueous dispersions of charged colloidal (clay) particles

1994 ◽  
Vol 72 (9) ◽  
pp. 1915-1920 ◽  
Author(s):  
Laurier L. Schramm ◽  
Loren G. Hepler
Keyword(s):  
Interfacial Tension ◽  
Pure Water ◽  
Surface Tensions ◽  
Flow Rates ◽  
Aqueous Dispersions ◽  
Clay Particles ◽  
Interfacial Tensions ◽  
Aqueous Suspensions ◽  
Colloidal Clay ◽  
Effect Of Surface

We have measured (du Nouy ring and maximum bubble pressure methods) suspension–air surface tensions of aqueous suspensions of montmorillonite and have observed that these surface tensions are larger than those of pure water at the same temperatures. Further measurements have shown that dispersed montmorillonite also increases the suspension–toluene interfacial tension compared with that of pure water–toluene. Similar measurements on aqueous suspensions of kaolinite have yielded suspension–air interfacial tensions with uncertainties as large as the observed (small) effect, and also shown that the suspension–toluene interfacial tension is decreased (opposite to the effect of montmorillonite) by amounts larger than the experimental uncertainties. Measurements of maximum bubble pressures at different flow rates have provided information about the effect of surface age on observed surface tensions.

Interfacial Tension Along the Binodal Curve in the Benzene-Ethanol-Water and n-Hexane-Acetone-Water Ternary Systems at 25 °C

1996 ◽  
Vol 61 (4) ◽  
pp. 489-500 ◽  
Author(s):  
Markéta Čechová ◽  
Lidmila Bartovská
Keyword(s):  
Interfacial Tension ◽  
Ternary Systems ◽  
Binodal Curve ◽  
Miscibility Gap ◽  
Surface Tensions ◽  
Interfacial Tensions ◽  
Acetone Water

The surface tensions, interfacial tensions and densities of conjugate solutions of compositions lying in the miscibility gap were measured for two ternary systems, viz. benzene-ethanol-water and n-hexane-acetone-water, at 25 °C.

Measurement of the surface tensions and the interfacial tensions of n-pentane-water and R 113-water systems

1988 ◽  
Vol 9 (3) ◽  
pp. 409-424 ◽  
Author(s):  
H. Matsubara ◽  
M. Murase ◽  
Y. H. Mori ◽  
A. Nagashima
Keyword(s):  
Water Systems ◽  
Surface Tensions ◽  
Interfacial Tensions

Surface and Interfacial Tensions Along the Binodal Curve in the tert-Butyl Methyl Ether-Water-Alcohol Ternary Systems at 25 °C

2000 ◽  
Vol 65 (9) ◽  
pp. 1487-1496 ◽  
Author(s):  
Lidmila Bartovská ◽  
Markéta Čechová ◽  
Jaroslav Matouš ◽  
Josef P. Novák
Keyword(s):  
Methyl Ether ◽  
Ternary Systems ◽  
Butyl Alcohol ◽  
Binodal Curve ◽  
Miscibility Gap ◽  
Surface Tensions ◽  
Interfacial Tensions ◽  
Tert Butyl ◽  
Water Alcohol ◽  
Butyl Methyl Ether

The surface tensions, interfacial tensions, and densities of conjugate solutions of compositions lying in the miscibility gap were measured for three ternary systems, viz. tert-butyl methyl ether-water-ethanol, tert-butyl methyl ether-water-tert-butyl alcohol, and tert-butyl methyl ether-water-butan-1-ol, at 25 °C.

scholarly journals Micro-Surface and -Interfacial Tensions Measured Using the Micropipette Technique: Applications in Ultrasound-Microbubbles, Oil-Recovery, Lung-Surfactants, Nanoprecipitation, and Microfluidics

Micromachines ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 105 ◽  
Author(s):  
David Needham ◽  
Koji Kinoshita ◽  
Anders Utoft
Keyword(s):  
Interfacial Tension ◽  
Oil Recovery ◽  
Applied Pressure ◽  
Bilayer Membrane ◽  
Water Soluble ◽  
Radius Of Curvature ◽  
Surface Tensions ◽  
Lung Surfactants ◽  
Interfacial Tensions ◽  
Capillary Tip

This review presents a series of measurements of the surface and interfacial tensions we have been able to make using the micropipette technique. These include: equilibrium tensions at the air-water surface and oil-water interface, as well as equilibrium and dynamic adsorption of water-soluble surfactants and water-insoluble and lipids. At its essence, the micropipette technique is one of capillary-action, glass-wetting, and applied pressure. A micropipette, as a parallel or tapered shaft, is mounted horizontally in a microchamber and viewed in an inverted microscope. When filled with air or oil, and inserted into an aqueous-filled chamber, the position of the surface or interface meniscus is controlled by applied micropipette pressure. The position and hence radius of curvature of the meniscus can be moved in a controlled fashion from dimensions associated with the capillary tip (~5–10 μm), to back down the micropipette that can taper out to 450 μm. All measurements are therefore actually made at the microscale. Following the Young–Laplace equation and geometry of the capillary, the surface or interfacial tension value is simply obtained from the radius of the meniscus in the tapered pipette and the applied pressure to keep it there. Motivated by Franklin’s early experiments that demonstrated molecularity and monolayer formation, we also give a brief potted-historical perspective that includes fundamental surfactancy driven by margarine, the first use of a micropipette to circuitously measure bilayer membrane tensions and free energies of formation, and its basis for revolutionising the study and applications of membrane ion-channels in Droplet Interface Bilayers. Finally, we give five examples of where our measurements have had an impact on applications in micro-surfaces and microfluidics, including gas microbubbles for ultrasound contrast; interfacial tensions for micro-oil droplets in oil recovery; surface tensions and tensions-in-the surface for natural and synthetic lung surfactants; interfacial tension in nanoprecipitation; and micro-surface tensions in microfluidics.

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