High-Performance pH-Switchable Supramolecular Thermosets via Cation-π Interactions
High-Performance pH-Switchable Supramolecular Thermosets via Cation-π Interactions
复制标题
通过阳离子-γ相互作用实现高性能pH可切换的超分子热固性材料
DOI：
10.1002/adma.201704234
复制
发表时间：
2018-02-15
影响因子：
29.4
通讯作者：
Wang, Dapeng
中科院分区：
文献类型：
--
作者：
Chang, Guanjun;Yang, Li;Wang, Dapeng
超分子化学为智能软材料的设计提供了通用且经济的解决方案，但它不能应用于刚性材料。本文介绍了一种利用非共价阳离子-π相互作用作为交联剂来设计高性能超分子热固性材料的新概念。这些超分子热固性材料是一类不熔和不溶的刚性聚合物，即使在超过300摄氏度的温度下也具有优异的机械性能。阳离子-π相互作用可以通过分别在高或低pH下的水处理来局部地可逆地安装和移除。交联的局部操作赋予这些热固性材料多种刺激响应功能，如可回收性、可愈合性、粘附性以及交联和机械性能的无损检测。
Supramolecular chemistry has provided versatile and affordable solutions for the design of intelligent soft materials, but it cannot be applied in stiff materials. This paper describes a new concept for the design of high-performance supramolecular thermosets by using the noncovalent cation-pi interaction as cross-linking. These supramolecular thermosets are a class of infusible and insoluble stiff polymers having excellent mechanical properties even at temperatures exceeding 300 degrees C. The cation-pi interaction can be locally and reversibly installed and removed by aqueous treatments at high or low pH, respectively. Local manipulation of cross-linking confers these thermosets with multiple stimuli-responsive functions, such as recyclability, healability, adhesion, and nondestructive detection of cross-linking and mechanical properties.