二维向列型液晶的I-N相变及纹影织构模拟  

I- N phase transition and schlieren texture simulation of 2D nematic liquid crystal

作　　者：杨胜林[1] 朱福和[2,3] 王伟 杨勇[3,4] 王芳[3,4] 陈鹏飞[1] 

机构地区：[1]东华大学纤维材料改性国家重点实验室,上海201620 [2]中国石化仪征化纤有限责任公司研究院,江苏仪征211900 [3]江苏省高性能纤维重点实验室,江苏仪征211900 [4]中国石化仪征化纤有限责任公司高纤中心,江苏仪征211900

出　　处：《合成技术及应用》2016年第2期1-3,共3页Synthetic Technology & Application

摘　　要：从液晶的Landau-de Gennes自由能出发进行推导,发现在二维情况下向列型液晶的I-N相变为二级相变,且相变点为NωФ=2;在液晶畸变自由能单一Frank常数假设下,利用元胞动力学方法对二维向列型液晶的Ginzberg-Landau方程进行计算机模拟,得到了其纹影织构图样。The isotropic- nematic（ I- N） phase transition of nematic liquid crystal has been found to be a second- order one in two- dimensional case and the transformation point should be NωФ = 2,which could be directly derived from the Landau- de Gennes free energy about the liquid crystal. Under the assumption of single Frank constant of distortion energy for the liquid crystal,the simulated schlieren texture has also be obtaind by numerically solving the Ginzberg- Landau equation of liquid crystal with cell dynamic scheme.

关 键 词：向列型液晶 I-N相变 纹影织构 模拟 

分 类 号：O753.2[理学—晶体学]