PREPARATION OF AOT-METAL SURFACTANTS AND THEIR PROPERTIES IN NON-AQUEOUS AND AQUEOUS MEDIA

Autor:	Tokuko Sugimura, Yuzoh Masuda, Masatoshl Hasegawa, Yolchi Sindo, Ayao Kitahara
Rok vydání:	1992
Předmět:	Aqueous solution Aggregation number Ionic radius Polymers and Plastics Chemistry Vapor pressure osmometry Inorganic chemistry Ionic bonding Alkali metal Micelle Surfaces Coatings and Films Metal visual_art visual_art.visual_art_medium Physical and Theoretical Chemistry
Zdroj:	Journal of Dispersion Science and Technology. 13:251-269
ISSN:	1532-2351 0193-2691
DOI:	10.1080/01932699208943314
Popis:	Thirteen kinds of AOT-metal surfactants (metal bis(2-ethyl hexyl)sulfosuccinate, MOT) were prepared by the metathesis of sodium bis(2-ethyl hexyl)sulfosuccinate (AOT) with the chlorides of transition, alkali, and alkaline earth metals. It was confirmed that bi- and trivalent MOTs are disoap and trisoap, respectively. The measurements of electric conductivity showed that the bond of SO∃ group in AOT molecule with the metals is ionic. The infrared spectra showed little coordination interaction of carbonyl groups with metal ions. The aggregation number determined by the vapor pressure osmometry decreased with the increase in metal valence in cyclohexane and benzene. This was interpreted as the result that micelle formation for bi- or trivalent MOTs is disturbed by intermolecular steric hindrance between aliphatic chains extended toward two or three directions. The plots of the solubilizing power for water vs the ionic radius of metals showed that the surfactants are roughly classified into two group...
Databáze:	OpenAIRE
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