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用滴体积法研究了温度及油酸钠 (SO)的复配对十六烷基三甲基溴化铵 (CTAB)水溶液的表面活性与胶团形成的影响。结果表明 :在 3 0 5~ 3 3 7K之间 ,CTAB的临界胶团浓度 (ccmc)随温度的升高而增大 ,形成胶团的过程是一个焓熵共同驱动的热力学自发过程 ;在 CTAB- SO复配体系中 ,正负离子表面活性剂之间存在着强烈的相互作用 ,等摩尔混合体系 (1∶ 1 )具有最高的表面活性 ,ccmc,γcmc,βm,βs和 p C2 0均具有最低值。
The drop volume method was used to study the effect of temperature and sodium oleate (SO) compounding on the surface activity and micellar formation of CTAB aqueous solution. The results show that the critical micelle concentration (ccmc) of CTAB increases with the increase of temperature at temperatures between 305 and 377K, and the formation of micelles is a thermodynamic spontaneous process driven by enthalpy entropy. In CTAB - SO complex system, there is a strong interaction between the positive and negative ionic surfactants. The equimolar mixing system (1: 1) has the highest surface activity with the lowest ccmc, γcmc, βm, βs and p C2 0 value.