Preparation of solid cholesteric films from biomaterials and usage of their optical performances

生物材料固体胆甾醇薄膜的制备及其光学性能的应用

• 批准号: 13450389
• 负责人: WATANABE. Junji
• 金额: $ 8.83万
• 依托单位: TOKYO INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13450389/
• 关键词: liquid crystal; stepwise transformation; Rod-like molecule; cholesteric phase; smectic phase; columnar phase; polysilane; polypeptide; 排除体積効果; スメクチック相; カラムナー相; コレステリック相

In the biological systems, there are many rod-like molecules which can form the liquid crystals. These molecules form the microfibril and are widely distributed in the skeletal systems, including plant cells, insect cuticles, bone and cornea. They function like angle-ply laminates which have the helical twisted structure as in the cholesteric liquid crystal, leading to the hypothesis that the molecules are oriented by spontaneous ordering or self-assembly during a formation of cholesteric liquid crystalline phases.More recent theoretical studies indicate that the biological rod-like molecules can also form the smectic and hexagonal columnar liquid crystals other than the cholesteric one. The variety of structures are responsible for the variety of performances in the biological system. In this study, by using the polysilane, we have successfully confirmed that simple rod-like polymers show the stepwise transformation to the higher ordered liquid crystal from simple cholesteric liquid crystal. According to these studies, we also success in the preparation of the high performance materials with the excellent mechanical properties and optical properties.

在生物系统中，有许多棒状分子可以形成液晶。这些分子形成微纤维，广泛分布在骨骼系统中，包括植物细胞、昆虫角质层、骨骼和角膜。它们的功能类似于具有胆甾型液晶中的螺旋扭曲结构的角层层压板，从而导致了这样的假设：分子在胆甾型液晶相形成过程中通过自发有序或自组装定向。最近的理论研究表明生物棒状分子除了可以形成胆甾型液晶外，还可以形成近晶型和六方柱状液晶。结构的多样性决定了生物系统的性能的多样性。在这项研究中，通过使用聚硅烷，我们成功地证实了简单的棒状聚合物表现出从简单的胆甾型液晶逐步转变为高阶液晶的能力。根据这些研究，我们还成功制备了具有优异机械性能和光学性能的高性能材料。

项目成果

B.Mettout, P.Toledano, H.Takezoe, J.Watanabe: "Theory of Polar Biaxial Nematic Phases"Phys.Rev.. E66. 031701-031705 (2002)

B.Mettout、P.Toledano、H.Takezoe、J.Watanabe：“极性双轴向列相理论”Phys.Rev.. E66。

unji Watanabe, Kento Ookoshi, Kohichi Sakajiri, S.Kawauchi, Jun Magoshi: "Columnar liquid crystals in polypeptides. 1. Columnar hexagonal phase observed in the lyotropic system of poly(γ-octadecyl L-glutamate) dissolved in amphiphilic molecules such as oc

unji Watanabe、Kento Ookoshi、Kohichi Sakajiri、S.Kawauchi、Jun Magoshi：“多肽中的柱状液晶。1. 在溶解于两亲分子（如 oc）的聚（γ-十八烷基 L-谷氨酸）的溶致体系中观察到柱状六角相。

K. Okoshi, G. Suzaki, H. Kamee, M. Tokita, J. Magoshi, and J. Watanabe: "Smectic liquid crystal observed in thermotropic system of rigid-rod poly(γ-octadecyl L-glutamate)"Jpn, J. Appl. Phys.. 41. L720-L722 (2002)

K. Okoshi、G. Suzaki、H. Kamee、M. Tokita、J. Magoshi 和 J. Watanabe：“在刚性棒聚（γ-十八烷基 L-谷氨酸）热致系统中观察到的近晶液晶”Jpn，J应用物理.. 41. L720-L722 (2002)

K.Okoshi, H.Kamee, G.Suzaki, M.Tokita, M.Fujiki, J.Watanabe: "Well-defined phase sequence including cholesteric, smectic A and columnar phases, observed in thermotropic LC system of simple rigid-rod helical polysilane"Macromolecules. 35. 4556-4559 (2002)

K.Okoshi、H.Kamee、G.Suzaki、M.Tokita、M.Fujiki、J.Watanabe：“在简单刚性棒螺旋的热致液晶系统中观察到明确的相序列，包括胆甾相、近晶 A 相和柱状相。

J. Watanabe, K. Ookoshi, K. Sakajiri, S. Kawauchi, and J. Magoshi: "Columnar liquid crystals in polypeptides. 1. Columnar hexagonal phase observed in the lyotropic system of poly(γ-octadecyl L-glutamate) dissolved in amphiphilic molecules such as octadecy

J. Watanabe、K. Ookoshi、K. Sakajiri、S. Kawauchi 和 J. Magoshi：“多肽中的柱状液晶。1. 在溶解于其中的聚（γ-十八烷基 L-谷氨酸）的溶致体系中观察到柱状六方相两亲性分子，例如十八烷基