通过拓设计的工程能耗途径:实现动态聚合物网络的可调节的宏观机械性能
Shaolei Qu1, Guoquan Liu1, Yuhang Liu1
1State Key Laboratory of Synergistic Chem-Bio Synthesis, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, Shanghai, 200240, P.R. China.
Angewandte Chemie (International ed. in English)
|August 25, 2025
概括
研究人员开发了一种使用宿主-客人和金属协调相互作用来控制超分子弹性体中的能量消散的新方法. 这可以提高材料的强度和性等机械性能.
科学领域:
- 材料科学
- 聚合物化学
- 超分子化学
背景情况:
- 提高弹性材料的性能通常涉及能量消耗的牺牲键.
- 精确控制这些材料中的能量消散途径是具有挑战性的.
- 在需要时选择性激活特定的超分子相互作用是困难的.
研究的目的:
- 开发一个直角自组装策略,以定制超分子弹性体中的能量消散机制.
- 整合主机-客户识别和金属协调交互.
- 通过拓结构设计精确控制能量消散路径.
主要方法:
- 使用一个直角自组合策略, 整合主机-客户识别和金属协调.
- 用于构建超分子聚合物网络 (SPN) 或机械互锁网络 (MIN) 的宿主-客户端模块的修饰轴末端.
- 在外力下研究能量消散机制,重点是宿主-客体解离和金属协调键断裂.
主要成果:
- 通过宿主-客体解离,SPN消散能量,而协调键保持完整.
- 在宿主-客体解离后,MIN通过金属协调键破裂表现出额外的能量消耗.
- 与SPN-2相比,MIN-2表现出优越的机械性能,包括更高的强度 (19.1 MPa与14.5 MPa) 和性 (57.7 MJ m-3与45.9 MJ m-3).
- MIN-2显示出增强的穿孔阻力.
结论:
- 正交自组装可以精确地控制超分子弹性体中的能量消散途径.
- 拓结构设计是调整材料性能的一种强大策略.
- 这种方法为开发高性能超分子弹性体提供了多功能途径.
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