液晶材料5CB Langmuir-Blodgett薄膜的制备  

Preparation of LB Films of Liquid Crystal 5CB

作　　者：牛小玲[1,2] 刘卫国[1] 惠迎雪[1] 

机构地区：[1]西安工业大学材料与化工学院,西安710032 [2]陕西师范大学化学与材料科学学院,西安710062

出　　处：《西安工业大学学报》2010年第6期553-556,共4页Journal of Xi’an Technological University

基　　金：陕西省国际合作重点计划项目(2010KW-07)

摘　　要：研究了新型高性能液晶材料5CB(4-氰基-4′-戊基联苯)薄膜的制备技术.采用Langmuir-Blodgett(LB)法制备了单分子液晶薄膜.通过实验得出均匀、完整的液晶材料5CBLB薄膜的最佳制备的工艺,成膜方式为Y型垂直提拉法,压膜速度为8 mm/min;提拉速度均为1.5 mm/min,液晶材料溶于三氯甲烷的浓度为1.0 mg/m L,亚相温度25℃.通过偏光显微镜观察发现,该液晶薄膜具有向列型条纹织构.液晶材料5CB LB薄膜的制备技术研究为其光学及电学研究提供了基础.The liquid crystal material 5CB monolayer films were prepared through Langmuir-Blodgett（LB） technology and Y-type plating membrane.The data of surface pressure-molecular area curves（π-A curve） is analyzed.It is found that the optimal conditions were as follows： the press speed 8 mm /min,the concentration of solution 1.0mɡ/ m L,pulling rate 1.5 mm /min,the temperature 25℃.The texture of the deposited liquid crystal 5CB LB monolayer films were investigated by a polarized light microscope（PLM）.The PLM result showed that the liquid crystal monolayer film exhibited stripe texture,which is the feature of nematic liquid crystal.The study on the preparation of liquid crystal 5CB LB film makes its optical and electrical studies possible.

关 键 词：LANGMUIR-BLODGETT膜 液晶5CB π-A曲线 液晶织构 

分 类 号：TB383.2[一般工业技术—材料科学与工程]