从物理交叉连接的主链亚烯液晶聚合物中完全可重编程,可回收和可光移动的室温软执行器
Shengkui Ma1, Lei Wang1, Yan Zhou1
1State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Functional Polymer Materials (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), and College of Chemistry, Nankai University, Tianjin 300071, China.
Molecules (Basel, Switzerland)
|May 27, 2023
概括
研究人员开发了新型的阿佐 (azo) 液晶聚合物 (LCP),可进行3D形状重编程,可回收利用,并在室温下具有光移动性. 这些先进的聚合物由于其独特的结构-属性关系,为光驱应用提供了新的可能性.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 纳米技术 纳米技术
背景情况:
- 亚 (azo) 聚合物对光触发应用具有前景,但在实现室温3D形状重编程性,可回收性和光移动性方面面临挑战.
- 开发具有多种功能的聚合物,如动态结合和有序相,对于先进的执行器设计至关重要.
研究的目的:
- 为了高效地合成主链酸液晶聚合物 (LCP),具有室温3D形状重编程性,可回收性和光流性.
- 研究聚合物骨干结构的影响,包括灵活的间距长度和结合群,对材料特性和光激应行为.
主要方法:
- 迈克尔添加聚合被用来合成一系列具有不同灵活间隔长度的聚胺二次胺 (PEAs).
- 聚合物纤维的单轴定向是通过融来实现的.
- 在室温 (25°C) 测定了光响应,机械性能,形状重编程和可回收性.
主要成果:
- 合成的PEAAs表现出低的玻璃过渡温度 (Tg ≤ 18.4 °C),有序的液体晶体相,以及可逆光反应.
- 融纤维表现出良好的机械强度,可逆光感应曲/不曲,并在室温下产生显著的应力.
- 纤维成功地被重新编程成稳定的纤维弹,在25°C时具有明显的解线/绕线光移动模式,并且可以从溶液中回收利用.
结论:
- 这项工作介绍了第一个亚博烯LCP,证明了3D形状的可重编程性,可回收性和室温光流性.
- 这项研究提供了关于这些可光变形聚合物的性能结构属性关系的关键见解.
- 这些发现对于设计下一代具有定制功能的光触发材料具有价值.
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