Study on the choresteric-smectic isothermal phase transition inducedby application of electric field

电场诱导的列构-近晶等温相变研究

• 批准号: 19350096
• 负责人: SASAKI Takeo
• 金额: $ 12.56万
• 依托单位: Tokyo University of Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2007
• 资助国家: 日本
• 起止时间: 2007 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19350096/
• 关键词: 液晶材料; 素子; 強誘電性液晶; コレステリック相; 電界誘起相転移; 自発分極; 3状態間スイッチング; 高分子安定化

A series of cholesteric liquid crystals possessing three ring structure as a mesogenic unit was synthesized. The liquid crystal exhibited an isothermal phase transition from planer phase to focal conic phase when an electric field was applied to the LC. The focal conic phase showed electro optical switching. The response time of the electro optical switching was about 600 micro s. The focal conic phase exhibited a spontaneous polarization of 5nC/cm^2. Those results indicate that the focal conic phase was a ferroelectric phase. Thus, It was shown that the cholesteric LC synthesized in this study exhibits isothermal phase transition from cholesteric phase to ferroelectric phase. The cholesteric LC shows three-states electro optical switching under application of electric field.

合成了一系列具有三环结构作为介晶单元的胆甾型液晶。当向液晶施加电场时，液晶表现出从平面相到焦点圆锥相的等温相变。焦点圆锥相位显示电光切换。电光开关的响应时间约为600微秒。焦锥相表现出 5nC/cm^2 的自发极化。这些结果表明焦点圆锥相是铁电相。因此，表明本研究合成的胆甾型液晶表现出从胆甾相到铁电相的等温相变。胆甾型液晶在电场作用下表现出三态电光切换。

项目成果

Photoinduced Depolymerization of Poly(olefin sulfone)s Possessing Photobase Generating Groups in the Side Chain

侧链具有光产碱基团的聚烯烃砜的光诱导解聚

• DOI: 10.1021/ma702001h
• 发表时间: 2007-11-28
• 期刊: Macromolecules
• 影响因子: 5.5
• 作者: H. Yaguchi;T. Sasaki
• 通讯作者: T. Sasaki

Photorefractive Effect of Ferroelectric Liquid Crystals with Application of Alternating Electric field

交变电场下铁电液晶的光折变效应

• 发表时间: 2007
• 作者: T. Sasaki; N. Moriya; Y. Iwasaki
• 通讯作者: Y. Iwasaki

等温的コレステリックースメクチック電界誘起相転移

等温胆甾-近晶场诱导相变

• 发表时间: 2007
• 作者: 赤堀陽介;佐々木健夫
• 通讯作者: 佐々木健夫

光機能性高分子材料の新たな潮流

光功能高分子材料新趋势

• 发表时间: 2008
• 作者: 佐々木健夫

Photorefractive Effect of Polymer-Stabilized Ferroelectric Liquid Crystals

聚合物稳定铁电液晶的光折变效应

• 发表时间: 2009
• 作者: T. Sasaki; Y. Nakazawa
• 通讯作者: Y. Nakazawa