A correlation of foam stability with surface shear viscosity and area per molecule in mixed surfactant systems

1978 ◽  
Vol 256 (10) ◽  
pp. 1002-1008 ◽  
Author(s):  
D. O. Shah ◽  
N. F. Djabbarah ◽  
D. T. Wasan
Keyword(s):  
Shear Viscosity ◽  
Foam Stability ◽  
Mixed Surfactant ◽  
Surface Shear ◽  
Mixed Surfactant Systems ◽  
Surfactant Systems ◽  
Surface Shear Viscosity

scholarly journals Surface shear inviscidity of soluble surfactants

2014 ◽  
Vol 111 (10) ◽  
pp. 3677-3682 ◽  
Author(s):  
Zachary A. Zell ◽  
Arash Nowbahar ◽  
Vincent Mansard ◽  
L. Gary Leal ◽  
Suraj S. Deshmukh ◽  
...  
Keyword(s):  
Shear Viscosity ◽  
Nonionic Surfactants ◽  
Emulsion Stability ◽  
Foam Stability ◽  
Sensitivity Limit ◽  
Multiple Control ◽  
Surface Shear ◽  
Soluble Surfactants ◽  
Almost All ◽  
Surface Shear Viscosity

Foam and emulsion stability has long been believed to correlate with the surface shear viscosity of the surfactant used to stabilize them. Many subtleties arise in interpreting surface shear viscosity measurements, however, and correlations do not necessarily indicate causation. Using a sensitive technique designed to excite purely surface shear deformations, we make the most sensitive and precise measurements to date of the surface shear viscosity of a variety of soluble surfactants, focusing on SDS in particular. Our measurements reveal the surface shear viscosity of SDS to be below the sensitivity limit of our technique, giving an upper bound of order 0.01 μN·s/m. This conflicts directly with almost all previous studies, which reported values up to 103–104 times higher. Multiple control and complementary measurements confirm this result, including direct visualization of monolayer deformation, for SDS and a wide variety of soluble polymeric, ionic, and nonionic surfactants of high- and low-foaming character. No soluble, small-molecule surfactant was found to have a measurable surface shear viscosity, which seriously undermines most support for any correlation between foam stability and surface shear rheology of soluble surfactants.

Temperature-induced vesicle to micelle transition in cationic/cationic mixed surfactant systems

Soft Matter ◽  
2015 ◽  
Vol 11 (45) ◽  
pp. 8848-8855 ◽  
Author(s):  
Yanjuan Yang ◽  
Lifei Liu ◽  
Xin Huang ◽  
Xiuniang Tan ◽  
Tian Luo ◽  
...  
Keyword(s):  
Mixed Surfactant ◽  
Mixed Surfactant Systems ◽  
Surfactant Systems

Realization of the vesicle to micelle transitions in cationic/cationic mixed surfactant systems by temperature stimuli.

Adsorption and coalescence in mixed surfactant systems: Water−hydrocarbon interface

2010 ◽  
Vol 65 (14) ◽  
pp. 4141-4153 ◽  
Author(s):  
S.M. Reddy ◽  
Pallab Ghosh
Keyword(s):  
Mixed Surfactant ◽  
Mixed Surfactant Systems ◽  
Surfactant Systems

scholarly journals Micellar Catalysis of Chemical Reactions by Mixed Surfactant Systems and Gemini Surfactants

2021 ◽  
Vol 33 (7) ◽  
pp. 1471-1480
Author(s):  
Mohammed Hassan ◽  
Sadeq M. Al-Hazmi ◽  
Ibrahim A. Alhagri ◽  
Ahmed N. Alhakimi ◽  
Adnan Dahadha ◽  
...  
Keyword(s):  
Gemini Surfactants ◽  
Chemical Properties ◽  
Catalytic Efficiency ◽  
Micellar Catalysis ◽  
Head Group ◽  
Mixed Surfactant ◽  
Structure Control ◽  
Mixed Surfactant Systems ◽  
Physico Chemical ◽  
Surfactant Systems

Micellar catalysis exhibited by mixed surfactant systems and gemini surfactants was reviewed. The review focused on mixed surfactant systems and tried to correlate the changes in the physico-chemical properties of these systems to the variations of their catalytic activities. Mixed surfactant systems are promising as the catalytic efficiency of some single surfactants was significantly enhanced in the presence of other critically selected surfactants. The selection should consider the charge, size, and structures of the head group as well as an appropriate length of hydrocarbon tail. The overall conclusion has arrived the mixed surfactant systems could be a tool by which the reaction rate can be tuned by changing the composition and/or the components’ structures. The higher catalytic activity of gemini surfactants compared to conventional ones, their facile synthesis and liability for structure control made them of superior choice for micellar catalysis.

Importance of 1:3 Molecular Ratio on the Interfacial Properties of Mixed Surfactant Systems

Langmuir ◽  
1999 ◽  
Vol 15 (21) ◽  
pp. 7403-7405 ◽  
Author(s):  
Alexander Patist ◽  
Surekha Devi ◽  
Dinesh O. Shah
Keyword(s):  
Interfacial Properties ◽  
Mixed Surfactant ◽  
Molecular Ratio ◽  
Mixed Surfactant Systems ◽  
Surfactant Systems

Attempt of Direct Measuring of Near Surface Shear Viscosity

2005 ◽  
Vol 436 (1) ◽  
pp. 203/[1157]-216/[1170] ◽  
Author(s):  
V. A. Tsvetkov
Keyword(s):  
Shear Viscosity ◽  
Surface Shear ◽  
Near Surface ◽  
Surface Shear Viscosity

Dual stimuli-responsive self-assembly transition in zwitterionic/anionic surfactant systems

Soft Matter ◽  
2015 ◽  
Vol 11 (21) ◽  
pp. 4283-4289 ◽  
Author(s):  
Wei Li ◽  
Yanjuan Yang ◽  
Lifei Liu ◽  
Xiuniang Tan ◽  
Tian Luo ◽  
...  
Keyword(s):  
Anionic Surfactant ◽  
Self Assembly ◽  
Mixed Surfactant ◽  
Stimuli Responsive ◽  
Mixed Surfactant Systems ◽  
Surfactant Systems

Realization of reversible vesicle–micelle transitions in zwitterionic/anionic mixed surfactant systems by temperature and pH dual stimuli.

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