The research of nematic/banana-shaped liquid crystal composite system in polymer network structure induced blue phase temperature range raise and extend

• Main Authors: Chia-Le Kao, 高佳樂
• Other Authors: 黃振球
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/11857771562351735206

碩士 === 元智大學 === 化學工程與材料科學學系 === 100 === Blue phase are known to appear in chiral liquid crystals between the chiral nematic phase and the isotropic liquid phase, have 3-dimensional structure and optical isotropic characteristic. The application is limited because the very narrow temperature range, usually less than a few Kelvin. This study is a novel way to effectively enhance the presence of temperature and range of blue phase. In the experiment, the achiral banana-shaped molecules is doped in chiral nematic liquid crystals observed in a wide temperature range blue phase, upgrade and blue phase temperature to 69.4 ° C; we also use the tri-functional monomer(TMPTA) and illumination polymerization to form the Polymer-Stabilized Liquid Crystal(PSLC),polymer network structure discussed by SEM images under different exposure temperature stable blue phase cube lattice arrangement. Apart from this, we observed the liquid crystal phase transformation by change the electric field.