Photoresponsive Behavior of Laminated Films Composed of a Flexible Plastic Sheet and a Crosslinked Azobenzene Liquid-Crystalline Polymer Layer with Different Initial Alignment of Mesogens
Photoresponsive Behavior of Laminated Films Composed of a Flexible Plastic Sheet and a Crosslinked Azobenzene Liquid-Crystalline Polymer Layer with Different Initial Alignment of Mesogens
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DOI：
10.1080/15421400802612391
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发表时间：
2009-02
影响因子：
0.7
通讯作者：
Munenori Yamada;M. Kondo;R. Miyasato;J. Mamiya;Motoi Kinoshita;Yanlei Yu;C. Barrett;T. Ikeda
中科院分区：
文献类型：
--
作者：
Munenori Yamada;M. Kondo;R. Miyasato;J. Mamiya;Motoi Kinoshita;Yanlei Yu;C. Barrett;T. Ikeda
采用热压法将交联偶氮苯液晶聚合物（CLCP）薄膜与未拉伸的低密度聚乙烯（PE）薄膜通过粘接层粘合，制备了由柔性塑料片和具有不同偶氮苯液晶基元初始取向的CLCP层组成的层压薄膜。在这两个层压膜与均匀排列的介晶和垂面的，大的运动可以诱导在室温下用紫外光照射。具有均匀CLCP的部分层压膜从整个膜的两端弯曲，而具有垂面CLCP的部分层压膜从膜的中心朝向光源向上弯曲。这些结果表明，我们使塑料薄膜没有光响应性能，光照射下灵活地移动，只是通过层压的CLCP层的一部分，和层压膜的光致运动是完全依赖于在CLCP层中的液晶基元的取向方向。此外，还发现均匀CLCP层压膜和垂直层压膜的最大应力和应力增量也不同。
Laminated films composed of a flexible plastic sheet and a crosslinked azobenzene liquid-crystalline polymer (CLCP) layer with different initial alignment of azobenzene mesogens were prepared by thermal compression bonding of a CLCP film and an unstretched low-density polyethylene (PE) film with an adhesion layer. In both laminated films with a homogeneous alignment of mesogens and a homeotropic one, large movements could be induced by irradiation with UV light at room temperature. A partly laminated film with homogeneous CLCP bent from both ends of the whole film, while one with homeotropic CLCP bent up from the center of the film toward the light source. These results indicate that we enable plastic films with no photoresponsive property to move flexibly upon photoirradiation just by laminating the CLCP layers partly, and the photoinduced motions of the laminated films are completely dependent on the alignment direction of the mesogens in the CLCP layers. In addition, it was found that the maximum stress generated in the films and the stress increment are also different between the homogeneous CLCP laminated films and the homeotropic ones.