A Convenient Route to Prepare Reactive Azobenzene‐Containing Liquid Crystal Polymers and Photodeformable Fibers
A Convenient Route to Prepare Reactive Azobenzene‐Containing Liquid Crystal Polymers and Photodeformable Fibers
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DOI：
10.1002/aisy.202000254
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发表时间：
2021-03
影响因子：
7.4
通讯作者：
Yan Chen;QUAN LIU;P. Théato;Jia Wei;Yanlei Yu
中科院分区：
文献类型：
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作者：
Yan Chen;QUAN LIU;P. Théato;Jia Wei;Yanlei Yu
含偶氮苯的液晶聚合物（azo-LCP）由于具有液晶性、光响应性和反应性的综合性能而备受关注，这使得它们在设计智能光驱动软致动器方面具有很大的潜力。在本文中，使用后聚合改性策略来使用聚（丙烯酸五氟苯基酯）与官能醇的酯交换反应制备一系列反应性偶氮LCP。这些反应性偶氮LCP在通过简单的热拉伸方法和随后在温和条件下与二胺的交联反应来制造纤维方面显示出良好的能力。此外，在紫外光和可见光（365/530 nm）交替照射下，所制备的纤维表现出可逆的形变行为。这种简单的合成策略有望为制造光驱动执行器开辟新的可能性。
Azobenzene‐containing liquid crystal polymers (azo‐LCPs) with reactive groups attract much attention due to the combined properties of liquid crystallinity, photoresponsivity and reactivity, which make them promising in designing intelligent photo‐driven soft actuators. Herein, a post‐polymerization modification strategy is used to prepare a series of reactive azo‐LCPs using the trans‐esterification reaction of poly(pentafluorophenyl acrylate) with functional alcohols. These reactive azo‐LCPs show good capabilities in fabricating fibers via a simple thermal‐drawing method and subsequent crosslinking reaction with diamine under mild conditions. Furthermore, the prepared fibers exhibit reversible deformation behaviors under the alternate irradiation of UV and visible light (365/530 nm). This facile synthetic strategy is expected to open up new possibilities for fabricating photo‐driven actuators.