Yang Daqing, Zhang Wenyu, Zhu Tiyun, Liu Xiao, He Liang, Meng Shuai, Li Zhiqiang, Xiong Qingqing
College of Chemistry and Materials Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding 071002, China.
College of Chemistry and Materials Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding 071002, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2023 Jun 5;294:122569. doi: 10.1016/j.saa.2023.122569. Epub 2023 Mar 2.
For typical synthetic materials, continue mechanical loading usually cause damage and even failure, because they are closed systems, without substance exchange with surroundings and structural reconstruction after damage. Double-network (DN) hydrogels have recently been demonstrated to generate radicals under mechanical loading. In this work, DN hydrogel provided with sustained monomer and lanthanide complex supply undergo self-growth, and thus simultaneous self-strengthen in both mechanical performance and luminescence intensity are realized through bond rupture-initiated mechanoradical polymerization. This strategy proves the feasibility of imparting desired functions to the DN hydrogel by mechanical stamping, and provides a new strategy for the design of luminescent soft materials with high fatigue resistance.
对于典型的合成材料，持续的机械加载通常会导致损伤甚至失效，因为它们是封闭系统，与周围环境没有物质交换，损伤后也没有结构重建。最近已证明双网络（DN）水凝胶在机械加载下会产生自由基。在这项工作中，具有持续单体和镧系元素配合物供应的DN水凝胶会自我生长，从而通过键断裂引发的机械自由基聚合实现机械性能和发光强度的同时自我增强。该策略证明了通过机械冲压赋予DN水凝胶所需功能的可行性，并为设计具有高抗疲劳性的发光软材料提供了新策略。
