Prasad Madhumita, Chakraborty Indranil, Rakshit Animesh K, Moulik Satya P
Center for Surface Science, Department of Chemistry, Jadavpur University, Kolkata, India.
J Phys Chem B. 2006 May 25;110(20):9815-21. doi: 10.1021/jp057442n.
The micellization behavior of MEGA 10 has been studied at nine different temperatures by isothermal titration calorimetry (ITC), and thermodynamics of the process have been evaluated and examined in detail. The aggregation number of the nonionic surfactant has been estimated from the ITC results by a simulation procedure based on the mass action principle of micellization of the surfactant. The cmc of MEGA 10 has shown a minimum in temperature dependence as observed for ionic surfactants. For a comparison, the cmc and related thermodynamic parameters of an ionic surfactant, tetradecyltriphenylphosphonium bromide (C(14)TPB) studied at several temperatures in aqueous medium has been considered. The contributions of the headgroups of both the surfactants to the free energies of their respective micellization have been deciphered and presented.
通过等温滴定量热法（ITC）在九个不同温度下研究了MEGA 10的胶束化行为，并对该过程的热力学进行了详细评估和研究。根据表面活性剂胶束化的质量作用原理，通过模拟程序从ITC结果估算了非离子表面活性剂的聚集数。MEGA 10的临界胶束浓度（cmc）如离子表面活性剂那样呈现出温度依赖性的最小值。作为比较，考虑了在水介质中几个温度下研究的离子表面活性剂十四烷基三苯基溴化鏻（C(14)TPB）的cmc和相关热力学参数。已解读并呈现了两种表面活性剂的头基对其各自胶束化自由能的贡献。
