Towards Solar-Driven Formation of Robust and Self-Healable Waterborne Polyurethane Containing Disulfide Bonds via in-situ Incorporation of 2D Titanium Carbide MXene

作     者：Sai Gong Shanglin Xiang Tingwei Wang Dongyu Cai 

作者机构：College of Materials Science&EngineeringNanjing Tech UniversityNanjing211816China Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM)Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing Tech UniversityNanjing211816China 

出 版 物：《Journal of Renewable Materials》 (可再生材料杂志（英文）)

年 卷 期：2023年第11卷第3期

页      面：1063-1076页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：National Natural Science Foundation of China(Grant No.21503110)for supporting this work 

主　　题：MXene waterborne polymer photothermal conversion film formation 

摘      要：Waterborne polymers are vital for coating industry to reduce carbon ***,formation of robust and self-healable films at ambient temperature remains a challenge owing to high energy cost of film formation *** work reports a solar-driven film formation of waterborne polyurethanes(WPUs)containing disulfide bonds via in-situ incorporation of 2D titanium carbide(MXene)with ability to convert light to *** of directly mixed with WPUs,MXene is added to join the reaction with isocyanate-terminated pre-polymer before emulsification *** approach not only prevents aggregation of MXene in water but stabilizes MXene against thermal degradation which is the key hurdle for mass production of MXene/WPU *** importantly,our results show that mechanical performance of WPU films under visible light(100 mW/cm^(2))is overwhelmingly competitive with that processed in ***,the existence of disulfide bonds in PU chains enables fast self-healing of micro-cracks under natural visible light which could vanish completely within 40 *** fractured specimens were repaired under natural visible light for 2 h,and the self-healing efficiency of tensile strength and elongation at break reached over 94.00%.