IGC studies of binary cationic surfactant mixtures
| Autor: | E.L. Arancibia, S.M. Bardavid, Pablo C. Schulz |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Activity coefficient
Chromatography Gas Hot Temperature Analytical chemistry Flory–Huggins solution theory Mole fraction Miscibility DSC Biomaterials Surface-Active Agents Colloid and Surface Chemistry Differential scanning calorimetry Pulmonary surfactant Cations Química Coloidal Inverse gas chromatography IGC Chromatography Chemistry CATIONIC SURFACTANT MIXTURES INTERACTION PARAMETERS Cationic polymerization Ciencias Químicas Surfaces Coatings and Films Electronic Optical and Magnetic Materials Quaternary Ammonium Compounds CIENCIAS NATURALES Y EXACTAS |
| Popis: | Inverse gas chromatography (IGC) has been used to measure the interaction parameter between two twin-tailed cationic surfactants. Didodecyldimethylammonium (DDAB) and dioctadecyldimethylammonium (DODAB) bromides and their mixtures were used as stationary phases. IGC and DSC techniques have been used for the determination of the temperature zone of working. The activity coefficients at infinite dilution (on a mole fraction basis) were calculated for eleven probe solutes on each pure surfactant column. Values of interaction parameter between surfactants obtained at four weight fractions of the mixtures and at five temperatures are positive and suggested that the interactions is more unfavourable with the increment of DODAB concentration in the mixture. The results are interpreted on the basis of partial miscibility between DDAB and DODAB. © 2007 Elsevier Inc. All rights reserved. Fil: Bardavid, S.M.. Universidad Nacional de Tucumán; Argentina Fil: Schulz, Pablo Carlos. Universidad Nacional del Sur; Argentina Fil: Arancibia, Eleuterio Luis. Universidad Nacional de Tucumán; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Química del Noroeste. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química del Noroeste; Argentina |
| Databáze: | OpenAIRE |
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