正、负离子表面活性剂混合溶液的胶束性质

Micellar Properties of Cationic and Anionic Surfactant Mixtures

摘要: 用Blankschtein等建立的表面活性系统的分子热力学模型，预测了十二烷基硫酸钠（C12SO4Na）和十烷基三甲基溴化铵（C12TAB）混合水溶液无外加盐时的临界胶束浓度（cmc），以及在外加NaBr浓度为0．1mol/kg时C12SO4Na和辛烷基三甲基溴化铵（C8TAB）混合水溶液的cmc，与实验值比较，预测结果令人满意。计算了C12SO4Na-C12TAB混合溶液在无外加盐和外加1．0mol/kgNaBr时的胶束化自由能，并与该溶形成双水相系统的关系进行了讨论。

Abstract: The critical micelle concentrations of sodium dodecyl sulfonate (C 12 SO 4Na) dodecyl trimethyl amine bromine (C 12 TAB) mixed system and C 12 SO 4Na octyl trimethyl amine bromine (C 8TAB) mixed system with 0.1mol/kg NaBr have been predicted by using the molecular thermodynamic model for surfactant systems proposed by Blankschtein et al. Compared with the experimental data, the predicted results are satisfactory. The mixed micellization free energies of C 12 SO 4Na C 12 TAB mixed systems have been calculated,and some experimental phenomena have been discussed by using the calculated results.