A Three-Armed Polymer with Tunable Self-Assembly and Self-Healing Properties Based on Benzene-1,3,5-tricarboxamide and Metal-Ligand Interactions
A Three-Armed Polymer with Tunable Self-Assembly and Self-Healing Properties Based on Benzene-1,3,5-tricarboxamide and Metal-Ligand Interactions
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基于苯-1,3,5-三甲酰胺和金属配体相互作用的具有可调自组装和自修复性能的三臂聚合物
DOI：
10.1002/marc.201800909
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发表时间：
2019-09-01
影响因子：
4.6
通讯作者：
Zhang, Qiuyu
中科院分区：
文献类型：
--
作者：
Li, Chunmei;Tan, Jiaojun;Zhang, Qiuyu
超分子的动态性质使其在智能设备领域非常有用。一种材料中多种动态相互作用的组合可以带来机械性能、自修复性能或可回收性方面的一些增强性能。因此，设计新型的多动态键合材料并阐明其键合机理具有重要意义。在这里，一种新型的三臂聚合物基于苯-1，3，5-三甲酰胺（BTA）的开发和聚合物可以进一步与金属离子络合，形成动态的锌-咪唑相互作用。在该体系中，苯并三氮唑位于中心位置，配体功能化单体与丙烯酸正丁酯共聚形成三条链。这是首次将BTA引入自修复体系，赋予聚合物自组装和自修复性能。研究了聚合物的组成、化学结构、组装行为、力学性能和自修复性能。结果表明，聚合物的组装行为依赖于BTA的含量和时间。机械性能可以通过配体/金属比容易地调节，并且通过聚合物链长和环境湿度显著地调节。长的聚合物链不仅有助于良好的机械性能，而且由于有效的物理缠结而促进自修复过程。
The dynamic nature of supramolecules makes them useful in the fields of smart devices. The combination of multiple dynamic interactions in one material may bring some enhanced properties in mechanical property, self-healing property, or recyclability. Thus, it is significantly meaningful to design new materials with multi-dynamic bonds and clarify their bonding mechanisms. Here, a novel three-armed polymer based on benzene-1,3,5-tricarboxamide (BTA) is developed and the polymer could be further complexed by metal ions to form dynamic zinc-imidazole interactions. In this system, BTA is located in the center, and the ligand-functionalized monomer is copolymerized with n-butyl acrylate to form three chains. This is the first time BTA is introduced to a self-healing system to endow the polymer with assembly and self-healing properties. The composition, chemical structure, assembly behavior, mechanical properties, and self-healing properties of the polymer are investigated. It is revealed that the assembly behavior of the polymer depends on the BTA contents and time. The mechanical property can be easily tuned by ligand/metal ratio and is significantly adjusted by the polymer chain length and environment humidity. Long polymer chains not only contribute to good mechanical property but also promote the self-healing process due to the effective physical entanglement.