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Role of partitioning site in producing viscoelasticity in micellar solutions
Author(s) -
Kumar Sanjeev,
Sharma Damyanti
Publication year - 2005
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/s11743-005-0353-3
Subject(s) - chemistry , micelle , viscoelasticity , micellar solutions , sodium salicylate , benzoic acid , sodium benzoate , context (archaeology) , bromide , organic chemistry , polymer chemistry , thermodynamics , aqueous solution , paleontology , physics , food science , biology
The effect of the addition of four aromatic compounds (anthranilic acid, benzoic acid, sodium anthranilate, and sodium benzoate) to 10 mM cetyltrimethylammonium bromide solutions is investigated by 1 H nuclear magnetic resonance spectroscopy. The site of solubilization of these molecules inside the micelle is inferred. It is shown that sodium anthranilate, which partitions near the head group region together with the external part of the micellar palisade layer (in Rosen's terminology), is most effective in producing micellar growth (or viscoelasticity). In this context a deeper penetration of an additive inside the micelle disqualifies it to produce viscoelasticity in the system. Furthermore, interior or palisade region solubilization depends on the nature of groups attached to the main benzene ring.