中文摘要：

采用电导法测定了不同温度下十六烷基三甲基溴化铵（CTAB）在二肽水混合溶剂中的电导率，计算得到CTAB在这些体系中的临界胶束浓度和胶束化热力学函数．结果表明，二肽一水混合溶剂中CTAB的临界胶束浓度受温度和加入的二肽浓度的影响．二肽的存在增加了CTAB的表面活性，使其临界胶束浓度减小；胶束化过程的自由能变△Gm均为负值，表明CTAB在二肽-水混合溶剂中的胶束化过程是自发进行的；△Hm对自由能变AGO的贡献相对于（-T△Sm）对自由能变△Gm的贡献小很多，胶束化过程为熵驱动过程，且存在焓-熵补偿效应．

英文摘要：

The electrical conductivity of the cetyltrimetyl ammonium bromide （CTAB） ＋ dipep- tide ＋ water ternary systems is measured at different temperatures. The values of critical micel- lar concentration（corn）,and the thermodynamic function of micellization are obtained. The results show that the Ccm values in aqueous dipeptide solutions are influenced by the temperature and the concentration of dipeptide. The surface activity of CTAB is enhanced by dipeptide, as a result the value of Ccm decreases. The free energy of micellization is negative in the presence of dipeptides, which indicates that micelle formation is a thermodynamically favorable process. Since the contri- bution of △H0 to △Gm is smaller than that of （--T△Sm） to △Gm, the micellization process is an entropy-driven process,and an enthalpy-entropy compensation effect is found in the micellization process.