Enthalpies of Mixing of Some Primary Hydrogenated and Fluorinated Alcohols and Sodium Dodecanoate Aqueous Solutions

Calorimetric and Volumetric Investigations of the Effect of the Hydrophobicity of the Surfactant on the Binding between (Ethylene oxide)13-(propylene oxide)30-(ethylene oxide)13 and Sodium Alkanoates in Aqueous Solutions

“…The property of micellization is calculated 14 as where Y D - H is the Debye−Hückel parameter (1.865 cm 3 mol -3/2 kg 1/2 for the volume and 1973 J mol -3/2 kg 1/2 for the enthalpy 15 ). For all the surfactants, the model was applied to the volume data which, whenever possible, were combined with those of literature. , The fitting parameters are collected in Table where some others for NaOct, , NaDec, NaL, and L64 4,10 are also reported.…”

“…For all the surfactants, the model was applied to the volume data which, whenever possible, were combined with those of literature. 16,17 The fitting parameters are collected in Table 1 where some others for NaOct, 10,18 NaDec, 19 NaL, 20 and L64 4,10 are also reported.…”

Heat Capacity Study to Evidence the Interactions between Cyclodextrin and Surfactant in the Monomeric and Micellized States

“…The enthalpy and the heat capacity of micellization (Δ Y m ) were calculated by using the following equation: 30 where [m 0 ] is the monomer concentration; Y M and are the partial molar property of the surfactant in the micellized and the standard states, respectively; Y D - H is the Debye−Hückel parameter (28.95 J K -1 mol 3/2 kg 1/2 for the heat capacity and 1973 J mol 3/2 kg 1/2 for the enthalpy 31 ); and B Y and C Y are the pair and triplet interaction parameters, respectively. Their values ,,,, are collected in Table .…”

Volumes of aqueous block copolymers based on poly(propylene oxides) and poly(ethylene oxides) in a large temperature range: A quantitative description

“…Nevertheless, the conventional surfactants may exhibit V U vs. temperature curves similar to those of copolymers (figures 1 and 2). With this in mind, the dependence of V U on temperature was calculated for sodium dodecanoate (NaL), at 0.028 mol AE kg À1 , which was chosen because of its relatively high DH m (9.67 kJ AE mol À1 ) [41] and low cmc [41] (0.028 mol AE kg À1 at 298 K). X M at various temperatures was evaluated on the basis of the pseudo-phase transition model by taking into account the DH m temperature dependence.…”