聚合物的透驱动硬化和闭环循环循环循环回收通过不同的金属-皮拉相互作用
Lei Huang1, Jiujie Xia1, Zeyuan Jin1
1MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, China.
Nature communications
|November 27, 2025
概括
这项研究引入了一种创新的策略,用于创建强大的,可回收的聚氨弹性体,使用不同的金属-醇 (DiMP) 协调. 这些动态聚合物在温和条件下表现出异常的性和高效的闭环可回收性.
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
- 可持续化学 可持续化学
背景情况:
- 开发具有高机械性能和闭环可回收的动态聚合物材料是一个重大挑战.
- 现有的可回收聚合物往往会损害机械强度或需要严苛的条件进行再加工.
研究的目的:
- 设计和合成一个机械坚固和可回收的聚氨弹性体,使用由驱动的硬化策略.
- 研究聚氨网中的不同金属-醇 (DiMP) 协调的结构-属性关系.
- 为了证明在温和条件下开发的材料的闭环可回收性.
主要方法:
- 利用不同的金属-醇 (DiMP) 协调,涉及多个离散的铜-合体复合体 (CuL2,Cu2L2,CuL3),以增强能量消散.
- 交叉连接的聚氨 (PU) 链与 DiMP 相互作用和层次的键形成 DiMP 交叉连接的 PU (DiMPU).
- 研究了聚合物变形机制和单体回收通过选择性酸溶解的pyrazole-urea债券.
主要成果:
- 在性方面实现了11倍的改进 (310.8 MJ m-3),拉伸强度为59.0 MPa和94%的弹性回收.
- 通过动态 DiMP 协调和结合,证明了梯度能量消散.
- 成功地回收了单体,并将它们重新设计成原始材料,证实了闭环可回收性.
结论:
- 使用DiMP协调的以为导向的硬化策略为机械坚固和可回收的聚氨弹性体提供了一条可持续的途径.
- 开发的DiMPU在高机械性能和环境循环性之间提供了有前途的平衡.
- 这项工作为设计用于可持续应用的先进动态聚合物提供了蓝图.
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