纤维素衍生物,如乙基纤维素,甲基纤维素,乙基氰乙基纤维素,乙基醋酸纤维素等与二氯乙酸所形成的溶液在浓度达到临界值以上后,出现胆甾型液晶相。在这类溶液中,液晶相的织态结构具有多重性,即胆甾型液晶相的织构随溶液浓度和温度而变化。在不同的浓度范围内,溶致性液晶可呈现出圆盘织构,条纹织构,假各向同性织构和具有鲜艳色彩的平面织构。这些织构均具有胆甾型液晶的特征。在液晶相刚形成,溶液处于 Cellulose derivatives, such as ethyl cellulose, methyl cellulose, ethyl cyanoethyl cellulose, ethyl cellulose acetate and dichloroacetic acid solution formed at concentrations above the critical value, the emergence of cholesteric Liquid crystal phase. In such solutions, the texture of the liquid crystal phase is multiplicative, that is, the texture of the cholesteric liquid crystal phase varies with the solution concentration and temperature. In different concentration ranges, the lyotropic liquid crystal can exhibit disc texture, striped texture, pseudomorphic texture and bright texture with a planar texture. These textures all have the characteristic of cholesteric liquid crystals. Just formed in the liquid crystal phase, the solution is at