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用偏光显微镜和RS75控制应力流变仪研究了LAS(直链烷基苯磺酸钠)/AEO-7(脂肪醇聚氧乙烯醚)/C2H5OH/H2O的拟三元体系的相行为和流变性能,绘制了相图.发现在靠近LAS/C2H5OH/H2O一侧整个液晶区只出现层状相液晶,无六角相液晶;而在靠近AEO-7/C2H5OH/H2O一侧的相行为变化比较典型,随着表面活性剂浓度增大,由胶束溶液逐渐向六角相液晶和层状相液晶过渡.在偏光显微镜下,观察到了层状相液晶和六角相液晶的偏光结构.流变性能研究结果与相行为相一致.
The phase behavior and rheological behavior of LAS (linear alkyl benzene sulfonate) / AEO-7 (fatty alcohol polyoxyethylene ether) / C2H5OH / H2O pseudo-ternary systems were investigated by polarization microscope and RS75 controlled stress rheometer The phase diagram is plotted and it is found that there is only lamellar phase liquid crystal and no hexagonal phase liquid crystal in the entire liquid crystal region near the LAS / C2H5OH / H2O side, while the phase behavior near the AEO-7 / C2H5OH / H2O side is typical , The transition from micellar solution to hexagonal phase and layered phase liquid crystals progressively with the increase of surfactant concentration.Polarization structures of lamellar and hexagonal liquid crystals were observed under a polarizing microscope.The results of rheological properties Consistent with the phase behavior.