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坚固的热步响应形状记忆辅助自愈弹性体用于宏观穿孔修复
Jie Zheng1, Zhongxin Ping1, Fang Xie2
1Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, P. R. China.
ACS applied materials & interfaces
|January 22, 2026
概括
新的自我修复聚合物使用动态金属协调键来自主修复大损伤. 这种形状记忆辅助自我愈合 (SMASH) 方法提高了材料的性,并延长了设备的寿命.
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:
- 自愈聚合物增强了设备的寿命和可靠性.
- 传统的聚合物与宏观损伤和变形作斗争.
- 形状记忆辅助自我愈合 (SMASH) 提供了一个解决方案,但在交叉链接稳定性方面面临挑战.
研究的目的:
- 开发使用动态金属协调键的坚固,热阶段响应的SMASH聚氨.
- 为了使软材料中的宏观损伤能够自主修复.
- 研究协调键在增强机械性能和自我愈合能力方面的作用.
主要方法:
- 在聚氨弹性体中利用Zn2+-皮里丁协调键作为动态交叉链接.
- 研究了用于形状恢复和愈合的热步响应行为.
- 特性机械性能,包括强度和性.
- 评估了不同温度下厘米大小的穿孔的自主修复.
主要成果:
- 开发了具有增强机械性能的SMASH聚氨 (49.71 MPa强度,138.17 MJ/m3性).
- 在40°C的温度下,在1分钟内实现了1.4厘米的穿孔的自主关闭.
- 在70°C时证明了宏观损伤的完全愈合.
- 确定了在能源储存,释放和维修过程中的链路流动性中协调交叉链接的三个关键角色.
结论:
- 金属协调键是有效的动态交叉链接,用于创建坚固的,自我愈合的软材料.
- 开发的SMASH聚氨可以自主修复宏观损伤,显著延长材料的使用寿命.
- 这种方法为设计用于苛刻应用的先进自我修复材料提供了宝贵的见解.
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