منابع مشابه
Cationic gemini surfactants as pseudostationary phases in micellar electrokinetic chromatography. Part I: effect of head group.
Two cationic gemini surfactants with pyrrolidinium or alkyl ammonium head groups with but-2-yne spacers, but with the same length hydrocarbon chain have been characterized with respect to their aggregation behaviors and separation power as pseudostationary phases (PSPs) for micellar electrokinetic chromatography (MEKC). They were compared with a commonly used PSP, sodium dodecylsulfate (SDS). T...
متن کاملMicrostructure and Dynamics of Wormlike Micellar Solutions Formed by Mixing Cationic and Anionic Surfactants
Small-angle neutron scattering (SANS) and rheology are used to probe the wormlike micelles formed in mixtures of a cationic (cetyl trimethylammonium tosylate, CTAT) and an anionic surfactant (sodium dodecyl benzene sulfonate, SDBS). For a fixed composition of 97/3 CTAT/SDBS, the zero-shear viscosity η0 initially increases rapidly with surfactant concentration, but decreases beyond an intermedia...
متن کاملEstimation of Octanol-Water Partition Coefficient Using Cationic Gemini Surfactants by Micellar Electrokinetic Chromatography
Mustafa GUZEL1, Cevdet AKBAY2*, Yatzka HOYOS2, David H. AHLSTROM2 1Istanbul Medipol University, International School of Medicine, Department of Medical Pharmacology (Chair), Regenerative and Restrorative Medicine Research Center (REMER) (Molecular Discovery and Development Group), Kavacık Campus, Kavacık/Beykoz-ISTANBUL 34810 2 Department of Chemistry and Physics, Fayetteville State University,...
متن کاملHighly Viscoelastic Wormlike Micellar Solutions Formed by Cationic Surfactants with Long Unsaturated Tails
Cationic surfactantshaving long (C22)mono-unsaturated tailswerestudied inaqueoussolutionscontaining salt using steady and dynamic rheology. The surfactant erucyl bis(hydroxyethyl)methylammonium chloride self-assembles into giant wormlike micelles, giving rise to unusually strong viscoelasticity. Under ambient conditions, the viscosity enhancement due to surfactant exceeds a factor of 107. Some ...
متن کاملInteractions of β-lactoglobulin with Cationic Surfactants: Spectroscopy Study
The interactions of β-lactoglobulin AB in the presence of cationic surfactants such as Cetyltrimethylammonium bromide and Cetyltrimethylammonium p-Toluenesulfonate have been investigated using a variety of experimental techniques such as conductivity, UV-Vis spectrophotometry and fluorimetry. The conductivity of surfactants aqueous solutions with β-lactoglobulin shows that the cmc of cationic s...
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ژورنال
عنوان ژورنال: Heliyon
سال: 2019
ISSN: 2405-8440
DOI: 10.1016/j.heliyon.2019.e02425