Azo-Functionalized Thermoplastic Polyurethane for Light-Driven Shape Memory Materials,Macromolecular Rapid Communications

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Azo-Functionalized Thermoplastic Polyurethane for Light-Driven Shape Memory Materials
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2022-11-09 , DOI: 10.1002/marc.202200650
Baohai Pan ₁ , Soon Mo Park ₂ , Wu Bin Ying ₃ , Dong Ki Yoon _{2,

4} , Kyung Jin Lee ₁

Affiliation

Shape memory polymers have great potential in the fields of soft robotics, injectable medical devices, and as essential materials for advanced electronic devices. Herein, light-triggered shape-memory thermoplastic polyurethane (TPU) is reported using azido TPU grafted by the photoswitchable azo compound. The trans–cis transitions of the azobenzene on the side chain of the TPU induce the recoiling of the main chain, leading to shaping memory behavior. Under UV irradiation, cis–azo allows the oriented main chain to recoil to release residual stress and realize light-triggered shape memory behavior. The facile method proposed here for the preparation of azo-functionalized TPU can provide viable opportunities for soft robotics and smart TPU applications.

中文翻译：

用于光驱动形状记忆材料的偶氮官能化热塑性聚氨酯

形状记忆聚合物在软体机器人、可注射医疗设备以及作为先进电子设备的基本材料等领域具有巨大潜力。在此，报道了光触发形状记忆热塑性聚氨酯 (TPU) 使用由光开关偶氮化合物接枝的叠氮基 TPU。TPU 侧链上偶氮苯的反式-顺式转变引起主链的反冲，从而导致塑造记忆行为。在紫外线照射下，顺偶氮使定向主链反冲以释放残余应力并实现光触发的形状记忆行为。这里提出的用于制备偶氮功能化 TPU 的简便方法可以为软机器人和智能 TPU 应用提供可行的机会。

更新日期：2022-11-09

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