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自愈和可再加工的聚氨弹性体,具有三重动态交联网络

Xingyu Mou¹, Yiqin Guo¹, Xuejun Lai¹

¹School of Materials Science and Engineering, Key Lab of Guangdong Province For High Property and Functional Polymer Materials, South China University of Technology, Guangzhou, China.

Macromolecular rapid communications

|August 14, 2025

概括

这项研究引入了一种具有三重动态网络的自我修复和可再加工的聚氨 (PU) 弹性体. 这种新型材料表现出优异的机械性能,高愈合效率和优异的热氧化衰老抵抗力,解决了PU回收的关键挑战.

科学领域:

聚合物化学聚合物化学
材料科学材料科学材料科学
可持续材料可持续材料

背景情况:

化学交联聚氨 (PU) 具有出色的机械性能,但面临着重大的回收挑战.
开发可回收和功能性PU对于可持续材料应用至关重要.

研究的目的:

合成一种自我愈合和可再加工的聚氨 (PU) 弹性体.
调查三重动态网络对材料特性和可回收性的影响.

主要方法:

合成的PU弹性体使用甲基二二二酸盐,聚乙胺,protocatechualdehyde和tris(2-aminoethyl) amine与Fe3+离子进行合成.
集成的三重动态网络:键,Fe3+-甲基醇协调,和胺基键.
具有特色的机械性能,自我愈合效率,可重加工性和耐热氧化衰老的性能.

主要成果:

实现了优良的机械性能:抗拉强度为6.40 MPa,破裂延伸率为1838%,性为51.16 MJ m-3,破裂能量为154.91 kJ m-2.
证明了高的自我修复效率 (96.6%) 和卓越的再加工能力 (75.6%的抗拉强度在三个循环后保持).
由于残留的酸基基团,表现出出色的热氧化衰老耐受性.

结论:

开发的具有三重动态网络的PU弹性体为可回收和高性能材料提供了有前途的解决方案.
这种方法为创建具有增强耐用性和可持续性的功能弹性体提供了新的途径.
该材料的性能解决了当前聚氨应用中的局限性,为先进的材料设计铺平了道路.

关键词:

聚氨是一种聚氨.可重新处理的可重加工.这是一种自我愈合的疗法.耐热-氧化衰老的耐力.三重动态交联网络三重动态交联网络

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