中文摘要：

用表面张力法研究了苯乙烯基酚聚氧乙烯聚氧丙烯醚嵌段型非离子表面活性剂（PEP）分别与十二烷基硫酸钠（SDS）、十二烷基三甲基溴化铵（CTAB）复配体系分子问的相互作用，并根据测定的临界胶束浓度（CMC）及正规溶液理论计算了复配体系分子间相互作用参数及分子交换能，考察了表面活性剂、助表面活性剂、温度等因素对复配表面活性剂体系微乳液形成过程的相行为及热力学性质的影响。结果表明，二元组分（PEP＋SDS）及（PEP＋CTAB）复配体系在胶束中和表面吸附层中的都存在较强的增效作用，体系的能量降低，且前者的增效作用大于后者。（PEP＋SDS）／正己醇／正庚烷，水微乳液的W／O微乳区域面积最大，温度对该微乳液的相行为影响很小。在此微乳液形成的过程中，助表面活性剂醇从连续油相进入微乳液界面层的标准自由能变化△Gs〈0；标准焓变．△Hs=0，为无热效应过程，△Gs是由醇分子的混乱度熵变△Ss决定的。

英文摘要：

The interactions between triphenylphenoxy polyoxyethylenyl polyoxypropylene （PEP） and sodium dodecyl sulfate （SDS）, dodecyl trimethylammonium bromide （CTAB） were investigated respectively by using surface tension method. The mixed critical micelle concentration （CMC） values determined from the experimental data were used to calculate the molecular interaction parameters and molecule-exchanging energy according to the regular solution theory of the two mixed surfactant systems. The effects of surfactants, cosurfactants and temperature on the phase behavior and thermodynamic properties of the two mixed surfactant microemulsion systems were examined. The results show that the strong synergistic interactions exist in the micelles and the adsorbed film phase of both （PEP＋SDS） and （PEP＋CTAB） systems, as well as the system energy is reduced. The synergistic interaction in the （PEP＋SDS） system is stronger than that in the （PEP＋CTAB） system. The largest W/O microemulsion zone is formed in the （PEP＋SDS）/n-hexanol/n-heptane/water microemulsion system, and the phase behavior of this system exhibits temperature insensitivity. During the formation of microemulsion, the standard free energy △Gs for the transfer of the cosurfactant from the continuous oil phase to the interface is negative, and the standard enthalpy -△Hs of the aforesaid transfer process is zero. It indicates that the process is a process without heat effect, and its △Gs is decided by the standard entropy △Ss.