摘要
本文研究以非离子型表面活性剂-正辛醇-水-芳烃类所组成的微乳液,探讨醇从油相转移到界面相时的自由能变化,以及温度对自由能的影响。计算出熵和焓的变化,发现在实验范围内,上述热力学函数的对数值与芳烃侧链的碳原子数(n)呈线性关系: ln(-⊿G_(30°O)~0,s→i)=-8.67+0.118n ln⊿H_(s→i)=12.0-0.604n ln⊿S_(s→i)~0=6.32-0.55n 这些关系式对微乳液的构成和稳定性的讨论是重要的,还对几种芳烃异构体所构成的微乳液的热力学函数进行了实验和讨论。
In microemulsions consisting of four compounds, i.e. nonionic surfactant-wateroil-cosurfactants, the free energy of transfer from the continuous oil phase to interfacial region for the alcohol is reported. From the effect of temperature on the free energy, the entropy and the enthalpy value are also reported. The effect of carbon number of alkyl aromatics is described. It was shown that logarithms of the free energy, the entropy and the enthalpy value change as a linear function of the number of carbon atoms In the alkyl aromtics. These data are analyzed with respected to the microemulsion structure and stability.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1990年第6期528-533,共6页
Acta Chimica Sinica
基金
国家自然科学基金
