منابع مشابه
Physicochemical properties of oleic acid-based partially fluorinated gemini surfactants.
We have developed oleic acid-based partially fluorinated gemini surfactants with carboxylic acid headgroups. The fluorocarbon chain is covalently bound to the terminal carbonyl group of oleic acid via a -CH(2)CH(2)OCO- unit, and the carboxylic acid headgroups are introduced to the cis double bond of oleic acid via -OCOCH(2)CH(2)- units. The aqueous solution properties of these surfactants were ...
متن کاملFluorinated Surfactants Potentially Non - Bioaccumulable
This minireview updates non-exhaustive recent strategies of synthesis of original fluorosurfactants potentially non-biodegradable. Various strategies have been focused on: (i) the preparation of CF3-X-(CH2)n-SO3Na (with X=O, C6H4O or N(CF3) and n=8-12), (ii) the oligomerization of hexafluoropropylene oxide (HFPO) to further synthesize oligo(HFPO)-CF(CF3)CO-RH (where RH stands for an hydrophilic...
متن کاملSynthesis 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...
متن کاملSolution properties and electrospinning of phosphonium gemini surfactants.
Bis(diphenylphosphino)alkanes quantitatively react with excess 1-bromododecane to prepare novel phosphonium gemini surfactants with spacer lengths ranging from 2 to 4 methylenes (12-2/3/4-12P). Dodecyltriphenylphosphonium bromide (DTPP), a monomeric surfactant analog, was readily water soluble, however, in sharp contrast, phosphonium gemini surfactants were poorly soluble in water due to two hy...
متن کاملMicelle formation and CMC of gemini surfactants: a thermodynamic model
Gemini surfactants possess a structure resembling a pair of conventional single chain surfactants covalently connected by a spacer. The spacer can vary in length and chemical structure. In this paper, the aggregation behavior of gemini surfactants is examined on the basis of a free energy model developed by extending our theory for conventional surfactants. Free energy contributions beyond thos...
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ژورنال
عنوان ژورنال: Oleoscience
سال: 2011
ISSN: 1345-8949
DOI: 10.5650/oleoscience.11.319