文献类型：期刊文献

英文题名：Toughening, recyclable and healable nitrile rubber based on multi-coordination crosslink networks after "tetrazine click" reaction

作者：Wang, Qiang[1];Shi, Yi[1];Li, Qiuying[1];Wu, Chifei[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Polymer Proc Lab, Shanghai 200237, Peoples R China

年份：2021

卷号：150

外文期刊名：EUROPEAN POLYMER JOURNAL

收录：;EI(收录号：20211810299853);WOS:【SCI-EXPANDED(收录号:WOS:000642496300015)】；

基金：This work was supported by National Natural Science Foundation of China (51973059)

语种：英文

外文关键词：Coordination networks; Mechanical property; Recyclable materials

摘要：The recycling and self-healing functions of commercial rubber are of great significance in the field of sustainable materials. So far, manufacturing such rubber with excellent strength and toughness was still a huge challenge. Herein, the multi-coordination crosslink networks were designed to achieve this goal. First, the nitrile-butadiene rubber (NBR) was modified through 3,6-di(2-pyridyl)-1,2,4,5-tetrazine (DPT) click reaction to introduce the second ligand group. Next, the blend of modified NBR and metal salt (including ZnCl2 and CoCl2) was hot-pressed to form the metal-nitrile and metal-pyridine (nitrogen-containing heterocyclic groups) coordination bonds. The designed composite had ultra-high mechanical strength and toughness at the same time. Compared with the NBR/ZnCl2 composite, the tensile strength of NBR-DPT4-Zn10 composite with multi-coordination bonds was improved by 7.5-fold (from 5.5 MPa to 46.82 MPa), and the corresponding fracture energy was improved by 142% (from 26.2 MJ m(-3) to 63.5 MJ m(-3)). At the same time, the high recyclable and heat-healing efficiency were obtained. These achievements are expected to develop commercial rubber's recyclability and high mechanical properties.