Dynamic Polymer Network System Mediated by Radically Exchangeable Covalent Bond and Carbolong Complex
Dynamic Polymer Network System Mediated by Radically Exchangeable Covalent Bond and Carbolong Complex
复制标题
自由基交换共价键和碳龙配合物介导的动态聚合物网络系统
DOI：
10.1021/acsmacrolett.0c00035
复制
发表时间：
2020-03-17
影响因子：
7.015
通讯作者：
Xia, Haiping
中科院分区：
文献类型：
--
作者：
Chen, Yuan;Yang, Liulin;Xia, Haiping
开发具有多功能特性的动态聚合物体系具有重要的现实意义。在此，我们报道了一种动态共价聚合物网络的聚氨酯弹性体，该共价聚合物网络包含具有热敏和可逆交联的可交换的2-芳胺-1,3-二酮二聚体。此外，碳龙配合物是一种优良的光热剂，加入到动态网络骨干中。随着近红外光的照射，碳龙配合物迅速产生热能，热能随后触发动态共价键的裂解，产生自由基，激活聚氨酯网络。在概念验证实验中，我们证明了可交换共价键和碳长片段组合的效用，为具有时空控制能力的聚合物网络带来了多种功能特征，包括热致变色、光致变色、可重写性、可延展性和自愈性。该研究具有探索更多可调动力学和改进材料性能的潜力。
It is appealing to develop dynamic polymer systems with multifunctionl properties. Herein, we report a polyurethane elastomer with a dynamic covalent polymer network containing a radically exchangeable 2-arylindane-1,3-dione dimer as thermally sensitive and reversible cross-links. In addition, the carbolong complex, an excellent photothermal agent, is incorporated into the dynamic network backbone. With the irradiation of NIR light, the carbolong complex rapidly generates thermal energy, which subsequently triggers the cleavage of the dynamic covalent bond to generate radicals and activate the polyurethane network. In proof-of-concept experiments, we demonstrate that the utility of a combination of radically exchangeable covalent bond and carbolong moiety brings multiple functional characteristics to the polymer network with a capability of spatiotemporal control, including thermochromism, photochromism, rewritability, malleability, and self-healing. This study holds potentials for exploring more tunable dynamics and improved material properties.