中文摘要：

通过对稀溶液表面性能和浓溶液相行为的研究，探讨了乙醇对AEO9水溶液性能的影响。结果表明，随着乙醇用量的增加，AEO9在乙醇／水混合溶剂中的临界胶束浓度（cmc）增大，但cmc时的表面张力（γcmc）基本不变。三元相图中，在AEO9／乙醇一侧只有胶束溶液，没有液晶区出现；靠近AEO9／水一侧，随着AEO9含量的增加，由胶束溶液逐渐向六角相液晶和层状相液晶过渡。

英文摘要：

Influence of ethanol on performance of AEO9 aqueous solution were investigated via study of surface properties of dilute AEO9 solution and phase behavior of concentrate AEO9 solution. Results showed that the critical micelle concentration （emc） of the AEO9 in ethanoL/H20 mixed solvent increases with the increase of ethanol dosage while the surface tension at the cmc （Tcmc） virtually remains unchanged. From the phase diagram of AEOg/ethanol/H20, it can be seen that in the AEOg/ethanol side only micelle solution can be observed and no liquid crystalline region appears. In the AEO9/H2O side, following increasing of the AEO9 content,the phase in the solution transforms from micelle solution to hexagonal phase liquid crystal and lamellar phase liquid crystal gradually.