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Study on Optically Anisotropic Films Synthesized from Chitin.

甲壳素合成光学各向异性薄膜的研究。

基本信息

批准号：
14360095
负责人：
TAKEMURA Akio
金额：
$ 9.79万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14360095/
关键词：
Chitin Liquid Crystalinity Optically Anisotropic Dichroism Magnetic Field Shearing 液晶円二色性

项目摘要

Microcrystalline chitin (MC), which is moderately hydrolyzed in aqueous hydrochloric acid. has NH3+ and shows chiral-ncnlatic liquid crystalline structure in aqueous suspension. The phase diagram of three components of MC water and acrylic acid monomer was investigated. where isotropic anisotropic and birefringence phases are found. The above anisotropic phase shows chiral-nematic liquid crystalline structure and lyotropic liquid crystalline structure was known to fond in the three components system. It is the first phase diagram obtained with this system where orientated composite polymer using chitin was demonstrated as follows.The orientation was investigated using this system when placed in magnetic field of 5T From X ray diffraction analysis the more orientated film was obtained when cast from anisotropic phase than biphase systems. From the polarized FT-1R analysis glucose ring is orientating 90° amide and NH groups are orientating 0 against magnetic field direction. When orientated by shear strength, glucose ring is orientating 0° amide and NH groups are orientating 90° against shear direction whichi is tolally opposite when applying magnetic field.Thus it is known that optically anisotropic films can be prepared using chtin where orientation can easily be produced along, with the lengthwise or thickness direction using shear or magnetic field.

微晶几丁质（MC），在盐酸中适度水解。含NH3+，在水悬浮液中显示手性非纳米液晶结构。研究了MC水与丙烯酸单体的三组分相图。发现各向同性各向异性和双折射相。上述各向异性相显示手向列液晶结构，而在三组分体系中已知存在溶向液晶结构。这是该系统获得的第一个相图，其中使用甲壳素的定向复合聚合物如下所示。X射线衍射分析表明，各向异性相铸造的薄膜比双相铸造的薄膜取向更明显。从极化FT-1R分析来看，葡萄糖环与酰胺方向呈90°取向，NH基团与磁场方向呈0°取向。当受剪切强度取向时，葡萄糖环向酰胺方向为0°，NH基团向剪切方向为90°，施加磁场时则完全相反。因此，我们知道，利用甲壳素可以制备光学各向异性薄膜，在这种薄膜中，利用剪切或磁场可以很容易地沿纵向或厚度方向产生取向。