丙烯酸铅对乙基纤维素胆甾型液晶的影响  

Influence of lead acrylate (PbA) on the cholesteric liquid crystals of ethyl cellulose (EC)/acrylic acid (AA)

作　　者：廖博[1] 何本桥[2] 

机构地区：[1]湖南科技大学化学化工学院,湘潭411201 [2]天津工业大学材料科学与工程学院,天津300160

出　　处：《胶体与聚合物》2009年第4期20-21,38,共3页Chinese Journal of Colloid & Polymer

摘　　要：本文利用紫外-可见分光光度计研究了丙烯酸铅(PbA)对乙基纤维素(EC)/丙烯酸(AA)胆甾型液晶的影响,研究发现:在EC/AA胆甾型液晶中,其最大选择性反射波长和螺距随溶液浓度增加而降低;PbA的加入也使反射波长和螺距降低,并且溶液中PbA浓度越大,反射波长和螺距降低越多,这可能是由于Pb2+与纤维素分子的络合作用,拉近了相邻EC分子链距离,导致胆甾型液晶溶液中的层间分子距离减小所致。利用这种性质调节纤维素胆甾型液晶的光学反射性能。The influence of lead acrylate （PbA） on the cholesteric liquid crystals of ethyl cellulose （EC） /acrylic acid （AA） was studied with using UV-vis spectrometer. It is found that the pitch and the maximum wavelength of selective reflection of the cholesteric liquid crystals were decreased when the concentration of EC was increased. The addition of PbA also decreased the pitch and the maximum wavelength of selective reflection. This was possibly related to the decrease in the intermolecular distance between cellulose molecules due to the complexation of lead and cellulose.

关 键 词：液晶 胆甾相 乙基纤维素 

分 类 号：TQ460.4[化学工程—制药化工] O753.2[理学—晶体学]