Ghosh S, Moulik SP
Department of Chemistry, Jadavpur University, Calcutta, West Bengal, 700 032, India
J Colloid Interface Sci. 1998 Dec 15;208(2):357-366. doi: 10.1006/jcis.1998.5752.
The formation of micelles of Tween-20 and Brij-35 as well as of SDS, Tween-20, and Brij-35 mixed in different proportions in aqueous medium has been physicochemically investigated. The critical micellar concentration (CMC), micellar aggregation number, counterion binding by micelles, micellar polarity, free energies of micellization and interfacial adsorption, and entropy of micellization have been evaluated by conductometric, tensiometric, and fluorimetric measurements. The solution composition has been found to have a complex say on the measured physicochemical parameters. The enthalpies of micellization of both Tween-20 + Brij-35 and SDS + Tween-20 + Brij-35 mixed surfactant systems have been found to be negligibly small. Attempts to understand the properties of mixed micelles (composition, mutual synergism, component activity coefficients, and CMC) have been made with the help of the propositions of Clint, Rubingh, and Rubingh and Holland. The mixed binary and ternary systems can be adequately described by these theories. Copyright 1998 Academic Press.
已对吐温 - 20、Brij - 35以及在水性介质中按不同比例混合的十二烷基硫酸钠、吐温 - 20和Brij - 35形成胶束的情况进行了物理化学研究。通过电导、张力和荧光测量，评估了临界胶束浓度（CMC）、胶束聚集数、胶束对抗衡离子的结合、胶束极性、胶束化和界面吸附的自由能以及胶束化熵。发现溶液组成对所测量的物理化学参数有复杂的影响。已发现吐温 - 20 + Brij - 35和十二烷基硫酸钠 + 吐温 - 20 + Brij - 35混合表面活性剂体系的胶束化焓都小到可以忽略不计。借助克林特、鲁宾和鲁宾以及霍兰德的观点，尝试理解混合胶束的性质（组成、相互协同作用、组分活度系数和CMC）。这些理论可以充分描述二元和三元混合体系。版权所有1998年学术出版社。
