Ultrasonic relaxation studies of mixed micelles formed from alcohol-decyltrimethylammonium bromide-water

Autor:	Emilio Aicart, D. J. Jobe, Ronald E. Verrall, Bohdan Skalski
Rok vydání:	1992
Předmět:	Chemistry Relaxation (NMR) General Engineering Fluorescence spectrometry Analytical chemistry Conductance Alcohol Primary alcohol Micelle chemistry.chemical_compound Pulmonary surfactant Critical micelle concentration Organic chemistry Physical and Theoretical Chemistry
Zdroj:	The Journal of Physical Chemistry. 96:6811-6817
ISSN:	1541-5740 0022-3654
DOI:	10.1021/j100195a051
Popis:	This paper discusses how ultrasonic relaxation and conductance studies of alcohol (1-pentanol or 1-butanol)-DTAB-water mixed micelles reveal two relaxation frequencies related to the exchange of monomer surfactant and of alcohol between the micelles and the bulk phase. Conductance and time-resolved fluorescence measurements were used to obtain the alcohol distribution coefficients, micelle ionization, critical micellar concentration, and the alcohol and surfactant mean aggregation numbers. Using two models (Aniansson and Hall & Wyn-Jones), information about the forward and backward rate constants, polydispersity of the mixed micelles and the change in volumes of the two exchange processes are obtained and compared with 1-propanol-DTAB-water. Alcohol chain length influence on thermodynamics and kinetics is also discussed. 16 refs., 12 figs., 6 tabs.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bbf8df02fb95e8b533298cda2c5c1fcd https://doi.org/10.1021/j100195a051 Zobrazit plný text záznamu