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应用自动表面张力仪测量了对硝铵结晶有显著影响的阴阳离子复合表面活性剂和在硝铵溶液中不同温度下的表面张力，求得了对应的临界胶束浓度（ＣＭＣ）．根据质量作用定律，得出了表面活性剂胶束化时的热力学模型，并对其热力学性质进行了计算和讨论。
The application of automatic surface tension meter to measure the surface of the anion and cation complex surfactants that have a significant effect on the crystallization of ammonium nitrate and the temperature in ammonium nitrate solution at different temperatures obtained the corresponding critical micelle concentration (CMC). According to the law of mass action, the thermodynamic model of surfactant when micelles is obtained, and its thermodynamic properties are calculated and discussed.