| 一种新型的氢键自组装液晶光控取向膜 |
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| 引用本文： | 吕凤珍,彭增辉,张伶莉,姚丽双,刘艳,宣丽.一种新型的氢键自组装液晶光控取向膜[J].物理化学学报,2009,25(2):273-277. |
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| 作者姓名： | 吕凤珍 彭增辉 张伶莉 姚丽双 刘艳 宣丽 |
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| 作者单位： | State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, P. R. China; Graduate School of the Chinese Academy of Sciences, Beijing 100039, P. R. China; Department of Physics, College of Science, Harbin Institute of Technology, Harbin 150001, P. R. China |
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| 基金项目： | 国家自然科学基金，吉林省与中国科学院科技合作项目 |
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| 摘 要： | 报道了一种新型的以氢键为驱动力的液晶自组装光控取向膜, 研究了薄膜的制备方法与光敏特性. 通过聚(4-乙烯基吡啶)中的吡啶基团与光敏聚丙烯酰氧基肉桂酸间的氢键作用制备了LBL(layer-by-layer)型的自组装多层膜, 制备过程的紫外-可见光谱表明, 该组装过程为逐层、均匀沉积过程. 傅里叶变换红外光谱表明, 多层膜的成膜驱动力为氢键. 用线性偏振紫外光辐照该薄膜, 多层膜中与光矢量方向匹配的光敏基团发生2+2]环加成反应, 形成表面张力各向异性的薄膜. 用该薄膜作为向列相液晶的取向膜制成平行液晶器件, 在偏光显微镜下观察, 发现获得了均一、稳定的取向效果.
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| 关 键 词： | 液晶 光控取向 自组装多层膜 线性偏振紫外光 氢键 |
| 收稿时间： | 2008-09-05 |
| 修稿时间： | 2008-10-27 |
A New Type of Hydrogen-Bonded LBL Photoalignment Film for Liquid Crystal |
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| LU Feng-Zhen,PENG Zeng-Hui,ZHANG Ling-Li,YAO Li-Shuang,LIU Yan,XUAN Li.A New Type of Hydrogen-Bonded LBL Photoalignment Film for Liquid Crystal[J].Acta Physico-Chimica Sinica,2009,25(2):273-277. |
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| Authors: | LU Feng-Zhen PENG Zeng-Hui ZHANG Ling-Li YAO Li-Shuang LIU Yan XUAN Li |
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| Institution: | State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, P. R. China; Graduate School of the Chinese Academy of Sciences, Beijing 100039, P. R. China; Department of Physics, College of Science, Harbin Institute of Technology, Harbin 150001, P. R. China |
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| Abstract: | A new type of hydrogen-bonded layer-by-layer (LBL) photoalignment film was fabricated and studied. The photosensitive hydrogen donor containing cinnamoyl groups (Poly(4-acryloyloxy)-cinnamic acid, PCA) was self-assembled with hydrogen accepter poly (4-vinylpyridine) (PVPy) in an organic solvent. Then a hydrogen-bonding-directed ultrathin film was formed. The uniformity and linear growth of the deposition procedure was proven by UV-Vis spectra and the interaction between PVPy and PCA was identified as hydrogen bonding using FT-IR spectroscopy. When linearly polarized ultraviolet light (LPUVL) irradiated the multilayer film, only the photosensitive double bond parallel to the polarization direction of LPUVL could be polymerized via 2+2] cycloaddition. After the irradiation an anisotropic film was prepared, and we used this anisotropic film as an alignment layer of nematic liquid crystals, and obtained uniformand stable alignment results. |
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| Keywords: | Liquid crystal Photoalignment Self-assembled multilayer Linearly polarized ultra-violet light Hydrogen-bond |
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