液晶弹性体中的热门共价适应性,用于稳定的执行
Yixuan Wang1, Enjian He1, Huan Liang1
1Tsinghua University, Department of Chemistry, CHINA.
Angewandte Chemie (International ed. in English)
|May 19, 2025
概括
这项研究引入了稳定,可更换的液晶弹性体执行器,使用一种具有高温激活值的新型动态共价键. 这些执行器表现出热封闭的行为,确保了先进智能材料应用的耐用性和可重编程性.
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
- 软机器人软机器人 软机器人软机器人
背景情况:
- 液晶弹性体 (LCE) 为软机器人和人工肌肉等智能材料提供大,异构变形.
- 在LCE中,动态共价键 (DCB) 能够进行网络重组,从而促进定制的执行和重编程.
- 在启动过程中 DCB 意外激活,尤其是热变化时,会损害稳定性,导致故障.
研究的目的:
- 开发稳定,可更换的LCE执行器,具有热封闭的行为.
- 为了克服在启动过程中 DCB 意外激活的挑战.
- 在不牺牲可重编程性或性能的情况下实现长期的执行稳定性.
主要方法:
- 使用无催化剂的α-AC/A DCB与高温激活值的LCE执行器的制造.
- 永久交叉连接的整合,以防止意外的链滑动,并确保拓稳定性.
- 热门行为,执行稳定性和可重编程性的表征.
主要成果:
- 开发的LCE执行器在120°C时表现出"热门",在这个温度以下有惰性键交换,在160°C时快速激活.
- 执行器表现出前所未有的耐用性,在120°C下维持10,000个执行周期,没有故障.
- 该系统可逆地在可重编程性和执行稳定性之间切换,满足长期服务需求.
结论:
- 拟议的策略成功地创建了稳定,可更换的LCE执行器,具有受控的,热门的行为.
- 这种方法提高了驱动器的稳定性和耐用性,解决了当前智能材料的关键限制.
- 对于需要长期性能和可重编程性的应用,LCE执行器提供了一个有前途的解决方案.
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