Novel Method to Control Liquid Crystal Orientation based on Water Flow-induced Molecular Alignment
基于水流诱导分子排列控制液晶取向的新方法
基本信息
- 批准号:12555267
- 负责人:
- 金额:$ 2.82万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:2000
- 资助国家:日本
- 起止时间:2000 至 2002
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The uniform alignment of liquid crystal (LC) molecules is generally produced by a surface-induced alignment technique of a polymer surface. However, the conventional rubbing technique involves a serious problem that an electrostatic charge and dust are generated during mechanical friction by rubbing. In this study, a novel liquid crystal alignment technique was investigated in order to realize electrostatic charge-and dust-free on the polyimide surface. A uniform alignment of LC was obtained by using the polyimide surface which was exposed to unidirectionally flowing water at 343 K before imidization by thermal cure.The surface-induced alignment effect was not sufficient in the case of exposing the polyimide surface to the water flow after the thermal imidization. The local chain orientation on the polyimide precursor surface induced by exposing to the water flow and its amplification of the chain orientation by the thermal imidization is a possible mechanism of "water flow rubbing".Interface enhanced sum-frequency generation (ISFG) method is a second-order nonlinear optical technique, which is a powerful tool to study the surface and the interface. The ISEG method was used for investigating 4-cyano-4'-pentylbiphenyl (5CB) behavior at the (polymer / 5CB) interface. Poly (vinyl cinnamate) and poly (vinyl alcohol) were used as polymer. In both ISEG spectra, the absorbance bands attributed to the CN-stretching bands of 5CB were observed. At the (PVCi /5GB) interface, the absorbance band of CN-stretching appeared at 2225 cm^<-1>, which was in good agreement with CN-stretching band in the ET-IR spectrum of 5CB in the bulk state. However, at the (PVA/ 5CB) interface, the band of CN-stretching was sifted 100 cm^<-1> to lower frequency. This results indicate that the intermolecular interaction between PVA and 5CB is much larger than the case of PVCi and 5GB.
液晶(LC)分子的均匀比对通常是由聚合物表面表面诱导的比对技术产生的。但是,常规的摩擦技术涉及一个严重的问题,即通过摩擦在机械摩擦过程中产生静电电荷和灰尘。在这项研究中,研究了一种新型的液晶比对技术,以实现在聚酰亚胺表面上无静电电荷和无尘。通过使用聚酰亚胺表面获得LC的均匀比对,该表面在343 K处暴露于单向流动的水之前,然后通过热疗法添加添加。在热浸泡后,表面诱导的比对效应不足以使聚酰亚胺表面暴露于水流中。通过暴露于水流量及其通过热imidation对链取向诱导的聚酰亚胺前体表面上的局部链取向是“水流摩擦”的可能机制。接口增强的增强型总频率产生(ISFG)方法是二阶非线性光学技术,是一种强大的工具,是一种强大的工具,是一种研究表面和互面的工具。 ISEG方法用于研究(聚合物 / 5CB)界面处的4-氰基-4'-苯基苯基(5CB)行为。聚(乙烯基肉桂酸)和聚乙烯醇作为聚合物。在两个ISEG光谱中,都观察到归因于5CB的CN伸展带的吸光度带。在(PVCI /5GB)界面上,Cn伸展的吸光频带的吸光度为2225 cm^<-1>,它与散装状态的5CB的ET-IR光谱中的CN伸展带非常吻合。但是,在(PVA/ 5CB)界面上,将CN拉伸的频带筛选为100 cm^<-1>至较低的频率。结果表明,PVA和5CB之间的分子间相互作用比PVCI和5GB的情况大得多。
项目成果
期刊论文数量(36)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
H.Yang, H.Kikuchi, T.Kajiyama: "Thermal Switching Characteristics Based on smectic-A-Chiral Nematic Phase Transition of (Liquid Crystals/Chiral Dopant) Composites, with and without Side Chain-type Liquid Crystalline Polymer"Liquid Crystals. Vol.29. 1141-1
H.Yang、H.Kikuchi、T.Kajiyama:“基于(液晶/手性掺杂剂)复合材料的近晶-A-手性向列相变的热开关特性,有和没有侧链型液晶聚合物”液晶。
- DOI:
- 发表时间:
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- 影响因子:0
- 作者:
- 通讯作者:
T.Kajiyama, H.Yamane, H.Kikuchi: "Memory Switching of (Liquid Crystalline Copolymer/Low Molecular Weight Liquid Crystal) Composite Systems"Molecular Crystals Liquid Crystals. Vol.346. 217-227 (2000)
T.Kajiyama、H.Yamane、H.Kikuchi:“(液晶共聚物/低分子量液晶)复合系统的存储切换”分子晶体液晶。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
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- 通讯作者:
T.Kajiyama, H.Yamane, H.Kikuchi: "Bistable Memory Switching of (Liquid Crystalline Copolymer/Low Molecular Weight Liquid Crystal) Composite Systems"Molecular Crystals Liquid Crystals. Vol.346. 217-227 (2000)
T.Kajiyama、H.Yamane、H.Kikuchi:“(液晶共聚物/低分子量液晶)复合系统的双稳态记忆切换”分子晶体液晶。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
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- 通讯作者:
H.Yang, H.Kikuchi, T.Kajiyama: "(Homeotropically Oriented Polymer Network/Side Chain Type Liquid Crystalline Polymer/Liquid Crystal/Chiral Dopant) Composite with Thermally Addressed and Electrically Erasable Properties"Molecular Crystals and Liquid Crysta
H.Yang,H.Kikuchi,T.Kajiyama:“(垂直取向聚合物网络/侧链型液晶聚合物/液晶/手性掺杂剂)具有热寻址和电可擦除性能的复合材料”分子晶体和液晶
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- 影响因子:0
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M.Kawasaki, H.Yang, H.Kikuchi, T.Kajiyama: "Transient Light Scattering of Ferroelectric Liquid Crystals Enhanced by Adding Ferroelectric Liquid Crystalline Polymers"Molecular Crystals and Liquid Crystals. Vol.381. 69-84 (2002)
M.Kawasaki、H.Yang、H.Kikuchi、T.Kajiyama:“通过添加铁电液晶聚合物增强铁电液晶的瞬态光散射”分子晶体和液晶。
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KIKUCHI Hirotsugu其他文献
KIKUCHI Hirotsugu的其他文献
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{{ truncateString('KIKUCHI Hirotsugu', 18)}}的其他基金
Understanding basic nature, investigation of new phases and applications to device materials of frustrated liquid crystals
了解受挫液晶的基本性质、新相研究及其在器件材料中的应用
- 批准号:
21245037 - 财政年份:2009
- 资助金额:
$ 2.82万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Expansion of temperature range of liquid crystalline frustrated phase
液晶受挫相温度范围的扩大
- 批准号:
15350136 - 财政年份:2003
- 资助金额:
$ 2.82万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Environment dependence of single polymer chain stretching and application to molecular spring
单链聚合物链拉伸的环境依赖性及其在分子弹簧中的应用
- 批准号:
12650886 - 财政年份:2000
- 资助金额:
$ 2.82万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Development of Flexible and Large area Liquid Crystal Display Devices
柔性大面积液晶显示器件的开发
- 批准号:
12793005 - 财政年份:2000
- 资助金额:
$ 2.82万 - 项目类别:
Grant-in-Aid for University and Society Collaboration
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