Micellar Properties of a New Series of Stereochemical Sodium Carboxylates Bearing Double Bonds near Their Ionic Heads in Aqueous Media
作者: Christine DamasLudovic VannierMohamed AbarbriAlain DucheneRobert Coudert
作者单位: 1Laboratoire de Physicochimie des Interfaces et des Milieux Réactionnels, PIMIR EA 2098, Département de Chimie, Université François Rabelais, Avenue Monge, Parc de Grandmont, F-37200, Tours, France
刊名: Journal of Colloid And Interface Science, 1998, Vol.198 (2), pp.323-329
来源数据库: Elsevier Journal
DOI: 10.1006/jcis.1997.5323
关键词: stereochemical sodium carboxylatecritical micelle concentrationdouble bondcryoscopyconductimetryvapor pressure osmometryfree energy of micellization
原始语种摘要: Abstract(#br)The critical micelle concentrations (CMCs) of sodium carboxylates bearing one or two double bonds near the polar head are determined at various temperatures using cryoscopy, conductimetry, and vapor pressure osmometry techniques. CMC increases with temperature in the range 25 to 40°C. The enthalpy for micellization of monoenic and dienic compounds is determined above 25°C and found to be negative. The exothermic micellization process is attributed to the rigidity of the polar head group which inhibits molecular interactions in the micellar state. CMC increases with increasing number of double bonds. The free energy of micellization per unsaturated CH group (Δ G m (CH)) is then determined. The values obtained, which are −1.83, −1.56, −1.27, and −1.18 kJ·mol −1 at 0, 25, 33,...
全文获取路径: Elsevier  (合作)
影响因子:3.172 (2012)