The inter-micellar interaction enthalpies of DTAB/TX100 mixed micelles and their structural transitions
作者： Handi Yin , Peizhu Zheng , Jihua Zhao , Weiguo Shen
DOI: 10.1039/C7SM00912G
关键词: Counterion 、 Aqueous solution 、 Calorimetry 、 Entropy (order and disorder) 、 Gibbs free energy 、 Micelle 、 Chemistry 、 Isothermal titration calorimetry 、 Pulmonary surfactant 、 Physical chemistry
摘要: The heats of mixing for a series DTAB/TX100 mixed surfactant aqueous solutions were measured by flow-mixing calorimetry and isothermal titration (ITC) at 298.15 K 85 kPa, which used to calculate the inter-micellar interaction enthalpies (−ΔHC). signs −ΔHC pure DTAB TX100 micellar systems contrary parameters reported same in literature, suggesting that these might have Gibbs free energy character dominated entropy changes. It was found varied with total concentration ratio two surfactants, characterized different structures micelles. These phenomena discussed based on effects structural water around interface, hydration counterions, repulsive Coulombic interaction.
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