Effect of Temperature and Other Variables on the Optimum Formulation of Anionic Extended Surfactant–Alkane–Brine Systems

Autor:	Ana Forgiarini, Francia Vejar, R. E. Antón, Josmary Velásquez, Jean-Louis Salager, Cesar Scorzza
Rok vydání:	2009
Předmět:	Alkane chemistry.chemical_classification General Chemical Engineering Inorganic chemistry Oxide Ionic bonding Surfaces Coatings and Films chemistry.chemical_compound Brine chemistry Pulmonary surfactant Microemulsion Propylene oxide Physical and Theoretical Chemistry Alkyl
Zdroj:	Journal of Surfactants and Detergents. 13:69-73
ISSN:	1558-9293 1097-3958
DOI:	10.1007/s11743-009-1142-6
Popis:	Anionic extended surfactants of the alkyl polypropylene oxide sulfate type are found to obey the linear correlation lnS = k ACN for optimum formulation (three-phase behavior) of ionic surfactant–oil–water systems, with a k value essentially the same as for n-alkyl sulfates. The addition of n-pentanol produces a shift in optimum formulation without significant change in k. An increase in temperature is found to produce a decrease in surfactant hydrophilicity, which is opposite to the expected behavior of anionic species. This trend, which is typical of nonionic surfactant behavior, is probably due to the partial hydration of the very first propylene oxide units which are located close to the anionic head group.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6b94fdfa4537804fd1e11dd39cedaa16 https://doi.org/10.1007/s11743-009-1142-6 Zobrazit plný text záznamu Full text from SpringerLink Plný text