Self-Aggregation of a Cationic−Nonionic Surfactant Mixture in Aqueous Media: Tensiometric, Conductometric, Density, Light Scattering, Potentiometric, and Fluorometric Studies

Autor:	Rama M. Palepu, Animesh Kumar Rakshit, and Sandeep R. Patil, and Maryjo Doiron, Puthusserickal A. Hassan, Karen M. Glenn, K. Shivaji Sharma
Rok vydání:	2004
Předmět:	Potentiometric titration Analytical chemistry Cationic polymerization Conductance Ether Krafft temperature Light scattering Surfaces Coatings and Films chemistry.chemical_compound chemistry Pulmonary surfactant Partial specific volume Materials Chemistry Physical and Theoretical Chemistry
Zdroj:	The Journal of Physical Chemistry B. 108:12804-12812
ISSN:	1520-5207 1520-6106
DOI:	10.1021/jp048294o
Popis:	Self-aggregation of tetradecyltrimethylammonium bromide (TTAB, [CH3(CH2)13N+(CH3)3Br-]) and polyoxyethylene 23 lauryl ether (Brij-35, [CH3 (CH2)11(OCH2CH2)23OH]) binary surfactant mixture in aqueous medium was studied using tensiometric, conductometric, density, quasielastic light scattering, potentiometric, and fluorometric measurements. The binary surfactant mixture was studied well above the Krafft temperature, which was evaluated by conductance measurements. Rubingh's nonideal solution theory predicted nonideal mixing and attractive interaction between the constituent surfactants in the mixed micelle. Moreover, attractive interaction between the two surfactants in the mixed micelle is explained by assuming that water acts as a bridge between the hydrophilic polar groups of the surfactant molecules. The chain-chain interaction among the surfactant does not seem to be high in this case. The partial specific volume of pure as well as binary surfactant mixtures was also evaluated, and it was inferred that...
Databáze:	OpenAIRE
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