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Synthesis, Characterization and Surface Properties of Series Sulfobetaine Surfactants
Author(s) -
Qu Guangmiao,
Cheng Jiecheng,
Wei Jijun,
Yu Tao,
Ding Wei,
Luan Huoxin
Publication year - 2011
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-010-1212-9
Subject(s) - chemistry , surface tension , pulmonary surfactant , propane , butane , gibbs isotherm , molecule , critical micelle concentration , aqueous solution , analytical chemistry (journal) , micelle , organic chemistry , thermodynamics , catalysis , biochemistry , physics
A series of surface active sulfo‐propane betaines and sulfo‐butane betaines were synthesized with high yields by the reaction of an appropriate N , N ‐dimethyl alkylamine with an excess of 1,3‐propane sultone and 1,4‐butane sultone. The structures were characterized by 1 H‐NMR spectroscopy and elemental analysis. The micellar properties of these compounds were determined by surface tension methods. Surface tension measurements also provide information about the dependence of the surface tension at the CMC (γ cmc ), pC 20 (negative logarithm of the surfactant molar concentration C 20 required to reduce the surface tension by 20 mN/m), the surface excess (Γ max ) at air/solution interface, the minimum area per surfactant molecule at the air solution interface ( A ).