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A Systematic Study of Mixed Surfactant Solutions of a Cationic Ester‐Bonded Dimeric Surfactant with Cationic, Anionic and Nonionic Monomeric Surfactants in Aqueous Media
Author(s) -
Fatma Nazish,
Ansari Wajid Husain,
Panda Manorama
Publication year - 2013
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/s11743-013-1448-2
Subject(s) - chemistry , pulmonary surfactant , cationic polymerization , critical micelle concentration , aqueous solution , sodium dodecyl sulfate , monomer , aggregation number , pyridinium , ammonium chloride , micelle , inorganic chemistry , polymer chemistry , organic chemistry , nuclear chemistry , polymer , biochemistry
A novel cationic biodegradable dimeric (gemini) surfactant, ethane‐1,2‐diyl bis( N , N ‐dimethyl‐ N ‐hexadecylammoniumacetoxy) dichloride (16‐E2‐16), containing an ester‐linked spacer was synthesized. Its pure and mixed micellization properties with monomeric surfactants cetyl trimethyl ammonium chloride, cetyl pyridinium chloride, sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, cetyl alcohol ethoxylate (20EO) and tert ‐octylphenol ethoxylate (9.5EO) were investigated by surface tension measurements at 30 °C. The critical micelle concentration (CMC) of 16‐E2‐16 is well below that of cetyl trimethyl ammonium chloride containing the same number of carbon atoms in the hydrophobic tail per polar head. At different mole fractions of the gemini surfactant, the CMCs of the gemini‐conventional binary mixtures were determined and were found to be less than the ideal CMC values in all the cases indicating synergistic interactions. Aggregation number and Stern–Volmer constant, obtained by the fluorescence quenching technique, also support the synergistic behavior of the surfactant systems.