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甲基氰乙基纤维素在二氯乙酸(DOA)中能形成溶致性液晶。本文利用FTIR仪、阿贝折射仪以及偏光显微镜等手段,研究了该液晶溶液相转变过程中分子间的相互作用,折光行为,以及液晶相织构等的变化。发现相转变时分子间的相互作用发生大的变化。液晶相由许多小的取向区域组成,各小取向区域的取向程度和方向不同,随着浓度的提高,液晶内的有序程度逐渐提高,各小取向区域的取向方向逐渐趋于一致,总的取向度随之升高。
Methyl cyanoethyl cellulose can form lyotropic liquid crystals in dichloroacetic acid (DOA). In this paper, FTIR, Abbe refractometer and polarized light microscope were used to study the intermolecular interaction, refractive behavior and the change of liquid crystal texture during the phase transition of the liquid crystal solution. Large changes in the intermolecular interactions were found when the phase transitions were found. The liquid crystal phase is composed of many small orientation regions. The orientations and orientations of the small orientation regions are different. As the concentration increases, the degree of order in the liquid crystal gradually increases, and the orientation directions of the small orientation regions gradually converge. Degree of orientation increases accordingly.