Fluorescence-probe study of vesicle and micelle formations in a binary cationic surfactants system

Autor:	Taishi Kodama, Tamotsu Katada, Shigeyoshi Miyagishi, Tsuyoshi Asakawa, Kosuke Toda, Akio Ohta
Rok vydání:	2006
Předmět:	chemistry.chemical_compound Colloid and Surface Chemistry Chromatography chemistry Pulmonary surfactant Bromide Vesicle Critical micelle concentration Analytical chemistry Cationic polymerization Pyrene Binary system Micelle
Zdroj:	Colloids and Surfaces A: Physicochemical and Engineering Aspects. 277:20-26
ISSN:	0927-7757
DOI:	10.1016/j.colsurfa.2005.11.004
Popis:	A phase diagram of a dodecyltrimethylammonium bromide (DTAB)–didodecyldimethylammonium bromide (DDAB) system was obtained by a combination of two fluorescence probes, auramine and pyrene. In the DTAB-rich region, a vesicle was formed at first, and then a vesicle–micelle transition occurred at a higher concentration, near the critical micelle concentration of DTAB. On the other hand, in the region with a DDAB-rich composition, a small micelle appeared at lower concentrations, and a micelle–vesicle transition occurred at a higher concentration. It was found that the polarization was at a maximum at the DDAB-rich composition, and the addition of a small amount of DTAB to the DDAB vesicle caused the molecular packing at the vesicle membrane to tighten. However, the hydrophobic chain length of the single-tailed surfactant did not have a significant influence on the mixed vesicle membrane at a DDAB-rich composition.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dff4a11a302c5c92480e835a3ae4fcde https://doi.org/10.1016/j.colsurfa.2005.11.004 Zobrazit plný text záznamu Full Text from ScienceDirect