溶致液晶聚合物长度与时间的关系

Time Dependence of Lyotropic Liquid Crystals

溶致液晶材料在水中会形成聚合物,聚合物的长度会随着温度而改变,因此可以通过改变溶液的温度来改变聚合物的长度,从而在一定的温度和浓度范围内产生液晶相。研究了一种名为蓝色27的阴丹酮衍生物(C28-H18O10N4C12)的溶致液晶材料。实验发现,20℃时封装在玻璃盒中的浓度为4.5%的蓝色27水溶液样品的透光率随着搁置时间的延长明显增加,计算结果表明,样品的有序度会随着时间的延长而增加,这种增加与系统中聚合物长度随着搁置时间变长有关。

Lyotropic liquid crystal （LLC） materials tend to aggregate in water solution, and the length of the aggregates can be controlled by changing temperature and concentration of the LLC water solution, thus liquid crystal phase will be formed in appropriate concentration and temperature range. Blue 27, a derivative of indanthrone, is studied. The dependence of transmittance with time of 4. 5% Blue 27 water solution, which is sealed in glass cells, is measured at 20℃. The obvious increase of transmittance is observed. The calculation of the order parameter of the sample also shows that it increases with time. The increase of both the transmittance and the order parameter is relat- ed to the increase of LLC aggregates with time, which was very important in the research on LLC materials.