Title: Photoinduced Bending Behavior of Crosslinked Azobenzene Liquid-Crystalline Polymer Films with a Poly(oxyethylene) Backbone

Author: Jiu-an Lv, Weiru Wang, Jixiang Xu, Tomiki Ikeda, Yanlei Yu*

Journal: Macromol. Rapid Commun., 2014, 35(14), 1266–1272

Abstract:

Cross-linked azobenzene liquid-crystalline polymer films with a poly(oxyethylene) backbone are synthesized by photoinitiated cationic copolymerization. Azobenzene moieties in the film surface toward the light source are simultaneously photoaligned during photopolymerization with unpolarized 436 nm light and thus form a splayed alignment in the whole film. The prepared films show reversible photoinduced bending behavior with opposite bending directions when different surfaces of one film face to ultraviolet light irradiation.

论文链接：https://onlinelibrary.wiley.com/doi/full/10.1002/marc.201400112

PDF下载：Photoinduced Bending Behavior of Crosslinked Azobenzene Liquid-Crystalline Polymer Films with a Poly(oxyethylene) Backbone.pdf

通过自由基光引发剂与阳离子引发剂共同引发自由基聚合，我们利用原位长波长光引发聚合制备了以聚氧乙烯为骨架的偶氮苯交联液晶聚合物（CLCP）膜。在光聚合过程中，薄膜表面朝向光源的偶氮苯介晶在436 nm的光聚合下同时发生光取向，从而在整个薄膜中形成了一种展开（splay）取向。在紫外光照射下，薄膜的不同表面呈现出相反方向的可逆光诱导弯曲行为。