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Role of the functional group position in producing viscoelasticity in micellar solutions: A 1 H NMR study
Author(s) -
Kumar Sanjeev,
Sharma Damyanti
Publication year - 2002
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/s11743-002-0212-2
Subject(s) - chemistry , viscoelasticity , micellar solutions , counterion , bromide , micelle , proton nmr , functional group , salt (chemistry) , nmr spectra database , polymer chemistry , organic chemistry , spectral line , thermodynamics , polymer , aqueous solution , ion , physics , astronomy
Abstract 1 H NMR spectra of cetyltrimethylammonium bromide (CTAB) micellar solutions in the absence and presence of sodium anthranilate (NaAn) have been recorded. Studies were performed at a fixed CTAB concentration in the presence of different NaAn concentrations. The specificity of the functional group attached to the salt in producing changes (i.e., viscoelasticity) in CTAB micellar solutions was explored. It was concluded that the nature of the salt counterion together with its intercalation/adsorption in the head group region is the principal cause of viscoelasticity.