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Counterion effects on the aqueous solution viscosity of cationic surfactants
Author(s) -
Totten G. E.,
Goddard E. D.,
Matteson G. H.,
Wanchisen M. L.
Publication year - 1986
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02553092
Subject(s) - counterion , cationic polymerization , aqueous solution , chemistry , carboxylate , viscosity , alkyl , inorganic chemistry , sulfonate , ion , stoichiometry , substituent , polymer chemistry , organic chemistry , sodium , thermodynamics , physics
The effect of varying counterion structure on the aqueous solution viscosity of various cationic surfactants was systematically examined for compounds of the type: CH 3 (CH 2 ) x N(CH 3 ) 3 YAr. Ar = functionally substituted aryl moieties and Y = carboxylate (CO 2 − ), sulfinate (SO 2 − ) or sulfonate (SO 3 − ). Aqueous solution viscosity, which is assumed to be a measure of ion pair stability, is clearly affected by anion and cation structure, temperature, concentration and stoichiometry. An ortho substituent to the anionic functionality, e.g. hydroxyl, substantially increases ion pair stabilization. Ion pair stability is also enhanced by increasing the solution concentration, decreasing temperature, increasing cation/anion ratio or by increasing the alkyl (x) chain length.