Photoresponsive thin films of well-synthesized azobenzene side-chain liquid crystalline polynorbornenes as command surface for patterned graphic writing
Photoresponsive thin films of well-synthesized azobenzene side-chain liquid crystalline polynorbornenes as command surface for patterned graphic writing
复制标题
合成良好的偶氮苯侧链液晶聚降冰片烯的光响应薄膜作为图案化图形书写的指令表面
DOI：
10.1016/j.polymer.2021.123492
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发表时间：
2021-03
期刊：
影响因子：
4.6
通讯作者：
Yan-Qing Lu
中科院分区：
文献类型：
--
作者：
Jian Chen;Tianchi Xu;Weiguang Zhao;Ling-Ling Ma;Dongzhong Chen;Yan-Qing Lu
含偶氮苯的聚合物（偶氮聚合物）是一种备受关注的光响应材料，液晶偶氮聚合物具有良好的成膜性、有序结构和自修复能力，具有增强的光致异构和光致取向特性，有望发展成为光调制智能表面。本文通过开环易位聚合（ROMP）合成了两种不同聚合度（DP = 50和100）的偶氮苯侧链液晶聚芳烯PNB-Azo-n。柔性较小、相邻偶氮苯侧基间距较大的聚苯乙烯主链赋予了更强的H-聚集抑制作用和更好的光响应性。PNB-Azo-100薄膜的高DP偶氮聚苯乙烯由于其在光异构化和光取向方面的更好性能以及其与E7的双相液晶混合物的良好相容性和耐溶解性而很好地表现为上层双相液晶分子的命令表面。通过不同的光掩模，在正常尺寸下的选择性光学可读的LC图形书写已经被证明，并且已经实现了基于数字微镜器件（DMD）的动态微镜图案化系统的高达亚十微米的更高的网格分辨率。因此，这类液晶偶氮聚苯乙烯在液晶光取向系统和光敏器件中显示出潜在的防伪文件安全和智能卡技术的应用前景。
Azobenzene-containing polymers (azopolymers) are a kind of intensively explored fascinating photoresponsive materials, liquid crystalline (LC) azopolymers with excellent film-forming, ordered structure and self-repairing capability are endowed with enhanced photoisomerization and photoalignment characteristics capable of developing into photo-modulated smart surfaces. Here in this work, two azobenzene side-chain LC polynorbornenes of PNB-Azo-n with different DP ofn= 50 and 100 have been well synthesized through ring-opening metathesis polymerization (ROMP). The polynorbornene backbone of less flexibility with larger spacing between adjacent azobenzene side groups endows stronger inhibition for H-aggregation and better photoresponsiveness. The high-DP azopolynorbornene of PNB-Azo-100 thin films well behave as command surface for the upper layer nematic LC molecules thanks to their better performance in photoisomerization and photoalignment, together with their good compatibility and dissolution-resistance to the nematic LC mixture of E7. Selectively optically readable LC graphic writings at normal size through various photomasks have been demonstrated, and higher grid resolution up to sub-ten micrometer with a digital micromirror device (DMD) based dynamic photopatterning system has been achieved. Therefore, such kind of LC azopolynorbornenes demonstrate promising applications in LC photoalignment system and photoresponsive devices for potential anti-forgery document security and smart card technology.
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DOI：
10.1002/chin.200029276
发表时间：
2000-07
期刊：
ChemInform
影响因子：
--
作者：
J. Delaire;K. Nakatani
通讯作者：
J. Delaire;K. Nakatani
影响因子：
3.9
作者：
AOKI, K;SEKI, T;ICHIMURA, K
通讯作者：
ICHIMURA, K
接枝密度对苯并菲盘状侧链盘状液晶聚合物自组装的影响
影响因子：
3.4
作者：
Wu Mei;Gong Minqing;Zhou Dongshan;Wang Rong;Chen Dongzhong
通讯作者：
Chen Dongzhong
影响因子：
--
作者：
Sang-keun Oh;M. Nakagawa;K. Ichimura
通讯作者：
Sang-keun Oh;M. Nakagawa;K. Ichimura
影响因子：
16.6
作者：
通讯作者：
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