Dissymmetric Gemini Surfactants Generated by Disulfide Exchange in Mixed Micelles
نویسندگان
چکیده
منابع مشابه
Synthesis and Properties of Dissymmetric Gemini Surfactants
A series of novel dissymmetric gemini cationics surfactants was synthesized by three-step reactions. The dissymmetric gemini surfactants contain a dodecanoic acid dimethylethylamine ester as the constant cationic part on one side of the hydroxypropyl center and a similar other cationic part, but with a different acid length (from octanoic to palmitic), on the other side. The critical micelle co...
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Hybrid surfactants were generated through the simple mixing of fluorocarbon and hydrocarbon gemini surfactants in aqueous solutions at 25°C. Disulfide exchange between the disulfide in the spacer chain occurred in the mixed micelles. However, the generation of hybrid gemini surfactants was particularly inhibited by the addition of salt. The suppression of the electrostatic repulsion between the...
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The formation and the properties of wormlike micelles in aqueous solutions of mixed cationic and anionic gemini surfactants, 2-hydroxyl-propanediyl-α,ω-bis(dimethyldodecylammonium bromide) (12-3(OH)-12) and O,O'-bis(sodium 2-dodecylcarboxylate)-p-benzenediol (C(12)ϕC(12)), have been studied by steady-state and dynamic rheological measurements at 25°C. With the addition of a small amount of C(12...
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Three groups of pyrrolidinium headgroup-based gemini surfactants of 1,1'-(propane-1,3-diyl)bis(1-alkyl pyrrolidinium) bromide, in categories of symmetric CmC3CmPB (m = 10, 12, 14), dissymmetric CmC3C14PB (m = 10, 12, 14) and CmC3CnPB (m = 8, 10, 12, m + n = 24) surfactants, are studied using equilibrium surface tension, conductivity, fluorescence, and NMR techniques. The importance of the dissy...
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Critical micelle concentrations (CMCs) of cationic surfactant (alkyltrimethylammonium bromides, CnTABr, where n = 10, 12, 14, 16 and 18), and a bile salt sodium cholate (NaC) were determined from surface tension, conductance and dye solubilization methods, while of their equimolar mixtures from surface tension and dye solubilization methods. The interaction parameter (beta) obtained from analys...
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ژورنال
عنوان ژورنال: Journal of Oleo Science
سال: 2010
ISSN: 1345-8957,1347-3352
DOI: 10.5650/jos.59.95