含有十二烷基酚聚氧乙烯(10)醚的溶致液晶体系的研究

本文以非离子表面活性剂十二烷基酚聚氧乙烯(10)醚(TX-10)/苯乙烯/水组成的三元体系为研究对象, 绘制了三元相图, 选取液晶区域作为研究对象, 配制系列样品, 摄制了纹理照片, 用小角X光衍射法测定了液晶中各种组分变化时间的层间距, 并结合^2H NMR谱图和纹理照片的对照以及互为补充的分析, 为精确区分液晶结构提供了新的途径。这不仅对于基础理论研究, 同时对于日用化工和帮次采油都具有一定指导意义。

Study of lyotropic liquid crystals containing nonionic surfactant of TX-10

Lyotroic liquid crystals from nonionic surfactant (TX-10), styrene, and water were studied at 30℃ to determine the phase regions and obtain some typical photographs by using microscope with polarized-light. And the geometrical dimensions were determined by low angle X-ray diffractrion. The X-ray data showed that the structure of mesophase disclosed lamellar liquid crystals with Bragg spacing ratio of 1:1/2:1/3... For these lamellar liquid crystals the results indicated a linear increase of the interlayer spacing with addition of water or styrene and pronounced decrease with addition of TX-10 in the system. The ^2H NMR methods were specially applied to determine the exact liquid crystals' structure. It was found that the structure varied from mixed W/O type microemulsions and lamellar liquid crystals to single lamellar liquid crystals to single hexagonal liquid crystals to hexagonal liquid crystals and O/W type microemulsions in the liquid crystal region with the addition of the water. These results were discussed theoretically.