Work of adhesion and activity of aqueous solutions of ternary mixtures of hydrocarbon and fluorocarbon nonionic surfactants at the water–air and polymer–water interfaces

2014 ◽  
Vol 441 ◽  
pp. 226-232 ◽  
Author(s):  
Katarzyna Szymczyk
Keyword(s):  
Aqueous Solutions ◽  
Nonionic Surfactants ◽  
Ternary Mixtures ◽  
Work Of Adhesion

scholarly journals Unusually sluggish microemulsion system with water, toluene and a technical branched alkyl polyethoxylate

2015 ◽  
Vol 21 (3) ◽  
pp. 429-439 ◽  
Author(s):  
Marija Ilic ◽  
Franz-Hubert Haegel ◽  
Vesna Pavelkic ◽  
Snezana Zlatanovic ◽  
Zoran Markovic ◽  
...  
Keyword(s):  
Aromatic Hydrocarbons ◽  
Nonionic Surfactants ◽  
Binary Phase Diagram ◽  
Visual Observation ◽  
Ternary Mixtures ◽  
Microemulsion System ◽  
Slow Kinetics ◽  
Bicontinuous Microemulsion ◽  
Kinetics Of ◽  
Qualitative Measurements

Microemulsion systems with water, toluene and nonionic surfactants are interesting for application due to the excellent solvent properties of aromatic hydrocarbons. In this study, the pseudo-binary phase diagram (?fish-diagram?) of such a ternary system was investigated using a branched technical alkyl polyethoxylate. Lutensol ON 50 (i-C10E5) was considered a suitable surfactant. The system with technical branched i-C10E5 exhibits very long and for compositions near optimum solubilization, i.e. the minimum content of surfactant needed for a bicontinuous microemulsion, extremely long times for equilibration. In addition to visual observation, qualitative measurements of turbidity were performed with a UV-Vis spectrometer for characterizing the behavior of this unusually sluggish system. Isothermal phase diagrams at 20, 25 and 30?C yielded inconsistent results after the change of temperature and the application of mechanical stress for different treatment of the samples. Ternary mixtures of water, toluene, and Lutensol ON 50 seem to form long-living metastable states. The sluggishness and the ambiguous phase behavior of the system are discussed. Inconsistent results are attributed to the slow kinetics of the formation and destruction of liquid crystals and the ability of the system to form miniemulsions within an unusual concentration range.

Effect of pressure on apparent molal volumes of nonionic surfactants in aqueous solutions

1980 ◽  
Vol 73 (1) ◽  
pp. 124-129 ◽  
Author(s):  
Shoji Kaneshina ◽  
Minoru Yoshimoto ◽  
Hideki Kobayashi ◽  
Nagamune Nishikido ◽  
Gohsuke Sugihara ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Nonionic Surfactants ◽  
Effect Of Pressure ◽  
Apparent Molal Volumes ◽  
Molal Volumes
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