【摘要】 以甲基橙为溶剂化探针,根据其在超临界CO2/表面活性剂/助表面活性剂多元体系中的增溶情况,推断在正丁醇作用下,二辛酯琥珀酸磺酸钠(AOT)与辛基酚聚氧乙烯醚(TX-10)在超临界CO2介质中形成了反胶团.反胶团的形成是一个热力学自发过程:对于非离子表面活性剂TX-10,形成反胶团的主要动力来源于体系熵增加.对于阴离子型表面活性剂AOT,在低温下,熵增加是反胶团形成的主要动力;温度较高时,焓变成为反胶团形成的主要推动力.更多还原

【Abstract】 According to the solubilization behavior of methyl orange used as a solvation probe in the multiple system mixed by supercritical carbon dioxide,surfactants and cosolvents,this paper draws a conclusion that,under the action of n-butyl alcohol,the surfactants sodium bis-(2-ethylhexyl) sulfosuccinate(AOT) and isooctyl phenol poly-(ethoxylate)(TX-10) can form reverse micelles in supercritical carbon dioxide.The formation of the micelles is spontaneous in thermodynamics.Specifically,for nonionic surfactant TX-10,the formation of the micelles depends on the increase in entropy,while for anionic surfactant AOT,the formation mainly depends on the increase in enthalpy at a high temperature and on the increase in entropy at a low temperature.更多还原