【作者】 王振华； 范文如； 佟锐； 卢锡立； 夏和生；

【Author】 WANG Zhenhua;FAN Wenru;TONG Rui;LU Xili;XIA Hesheng;State Key Laboratory of Polymer Materials Engineering,Polymer Research Institute,Sichuan University;

【机构】 高分子材料工程国家重点实验室,四川大学高分子研究所；

【摘要】 <正>传统的修复材料主要是通过在材料内部分散或复合一些功能性物质来实现,这些功能性物质主要是装有修复介质的纤维或胶囊^[1]。形状记忆材料可以修复应力变形,但不能修复裂纹。将形状记忆材料和含动态键连接的自修复材料相结合,设计同时具有自修复和形状记忆性能的聚合物材料,克服了形状记忆和传统自修复材料的缺陷,不仅可以恢复形变,而且可以修复裂纹,更能实现多次修复。然而到目前为止形状记忆自修复材料的报道很少。更多还原

【Abstract】 A big challenge in developing stimuli-responsive materials is to integrate multiple functionalities such as shape memory property,healable ability,recyclability into a single-component material.With this purpose,we designed a novel poly(n-butyl acrylate-co-methyl methacrylate) bearing a side group 2,6-bis(l’-methylbenzimidazolyl)pyridine ligand,which is dynamically crosslinked by metal salt zinc trifluoromethanesulfonate to obtain the metallosupramolecular polymer.The shape recovery and healing is achieved upon thermal or light stimulus due to the specific metal-ligand interactions which not only serve as "inert" crosslinks network at low temperature to produce the shape recovery,but also dissociate at high temperature for healing.The healing rate is quick and the healing efficiently is close to ~90%.更多还原