Dynamic covalent polymers enabled by reversible isocyanate chemistry.
Dynamic covalent polymers enabled by reversible isocyanate chemistry.
复制标题
由可逆异氰酸酯化学实现的动态共价聚合物。
DOI：
10.1039/d2cc04747k
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发表时间：
2022-10
影响因子：
4.9
通讯作者：
Ning Zhao
中科院分区：
文献类型：
--
作者：
Wenxing Liu;Shijia Yang;Lei Huang;Jian Xu;Ning Zhao
通过引入动态共价键（DCB）来设计响应性材料是近年来的一个热门研究领域。动态共价键在一定条件下可以发生可逆的缔合和解离。可逆异氰酸酯化学反应的代表性物质包括氨基甲酸酯、硫代氨基甲酸酯和脲键，所有这些键在加热时都可以转化为各自的起始化学物质（异氰酸酯和活性氢化合物）。在这篇文章中，我们概述了影响异氰酸酯基键（IB）的动态特性的机制和实验因素。随着可逆异氰酸酯化学的知识，不同的动态共价聚合物，包括聚氨酯，聚脲，和聚硫氨酯的建设战略进行了讨论，特别是动态聚合物网络。概述了动态异氰酸酯基聚合物在回收和自修复材料、变形聚合物、3D打印和复合材料中的主要应用。可逆异氰酸酯化学的出现为设计热适应性材料提供了一个非常有效的平台。
The design of responsive materials by introducing dynamic covalent bonds (DCBs), which can undergo reversible association and dissociation under certain conditions, is an appealing research field in recent years. Reversible isocyanate chemistry representatively consists of urethane, thiourethane, and urea bonds, all of which can reverse into their own starting chemicals (isocyanates and active hydrogen compounds) upon heating. In this article, we overview the mechanisms and experimental elements affecting the dynamic features of isocyanate-based bonds (IBs). With the knowledge of reversible isocyanate chemistry, the construction strategies of different dynamic covalent polymers including polyurethanes, polyureas, and polythiourethanes are discussed, in particular for dynamic polymer networks. The major applications of dynamic isocyanate-based polymers in recycling and self-healing materials, shape morphing polymers, 3D printing, and composites are outlined. The emergence of reversible isocyanate chemistry offers a highly effective platform to engineer thermally adaptable materials.