Exploration of immobilization conditions of cellulosic lyotropic liquid crystals in monomeric solvents by in situ polymerization and achievement of dual mechanochromism at room temperature

Miyagi K.; Teramoto Y.

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Exploration of immobilization conditions of cellulosic lyotropic liquid crystals in monomeric solvents by in situ polymerization and achievement of dual mechanochromism at room temperature

机译：在室温下原位聚合方法纤维素溶血性液晶固定条件探讨单体溶剂中的双层机械溶剂

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We investigated conditions to prepare cellulosic cholesteric liquid crystalline (ChLC) films in order to accomplish dual mechanochromism, i.e., colour control and circular dichroic inversion upon mechanical stimulus, at room temperature. Flexible propionylated hydroxypropyl cellulose (PHPC) was prepared by a simple reaction and found to be capable of forming lyotropic ChLC in various monomeric solvents. The ChLC solutions were subjected to in situ polymerization to obtain PHPC/synthetic polymer composite films incorporating the ChLC structure. However, the immobilization behaviour depended on the type of original monomers. Differential scanning calorimetry and solid-state NMR measurement revealed that the ChLC structure was more highly fixed when the compatibility between PHPC and the coexisting polymers was lower. Eventually, thus obtained ChLC composite films exhibited dual mechanochromism under ambient temperature.

机译：我们研究了制备纤维素胆甾型液晶（CHLC）薄膜的条件，以实现双力学激素，即在机械刺激时，在室温下进行颜色控制和圆形二色性反转。通过简单的反应制备柔性丙酮化羟丙基纤维素（PHPC），并发现能够在各种单体溶剂中形成旋转层CHLC。对CHLC溶液进行原位聚合，得到包含CHLC结构的PHPC /合成聚合物复合膜。然而，固定行为取决于原始单体的类型。差分扫描量热法和固态NMR测量显示，当PHPC和共存聚合物之间的相容性较低时，CHLC结构更加高度固定。最终，如此获得的CHLC复合膜在环境温度下表现出双重机芯。

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《RSC Advances》 |2018年第44期|共7页
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Miyagi K.; Teramoto Y.;
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Gifu Univ Fac Appl Biol Sci Dept Appl Life Sci Gifu 5011193 Japan;

Gifu Univ Fac Appl Biol Sci Dept Appl Life Sci Gifu 5011193 Japan;

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正文语种 eng
中图分类化学;
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2. 室温及非传统条件下AlCl3-尿素低共熔溶剂中铝的电沉积 [J] . Vesna SCVETKOVIĆ, Nataša MVUKIĆEVIĆ, Niko JOVIĆEVIĆ, 中国有色金属学报：英文版 . 2020,第003期
3. Exploration of immobilization conditions of cellulosic lyotropic liquid crystals in monomeric solvents by in situ polymerization and achievement of dual mechanochromism at room temperature [J] . Miyagi K., Teramoto Y. RSC Advances . 2018,第44期

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4. Mechanical orientation in thermotropic liquid crystal state and magnetic orientation in solvent evaporation process via lyotropic liquid crystal state of an amphotropic low-bandgap liquid-crystalline π-conjugated polymer [J] . Goto H., Wang A., Nimori S., Liquid Crystals: An International Journal in the Field of Anisotropic Fluids . 2013,第9期

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5. Activation of mandelate racemase via immobilization in lyotropic liquid crystals for biocatalysis in organic solvents: application and modeling [J] . Christoph Bauer, Matthias Boy, Kurt Faber, Journal of molecular catalysis, B. Enzymatic . 2001,第2期

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机译：两亲性低带隙液晶π共轭聚合物的溶致液晶态在热致液晶态下的机械取向和溶剂蒸发过程中的磁取向

Exploration of immobilization conditions of cellulosic lyotropic liquid crystals in monomeric solvents by in situ polymerization and achievement of dual mechanochromism at room temperature

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