兼具紫外屏蔽功能的自修复聚氨酯涂层的制备与性能研究  

Preparation and Performance of Self-healing Polyurethane Coating with UV Shielding Function

作　　者：赵赟煜 李明玮 高雯莉 杨柯 倪亚茹[1,2] 方亮[1,2] 陆春华 许仲梓[1,2] ZHAO Yunyu;LI Mingwei;GAO Wenli;YANG Ke;NI Yaru;FANG Liang;LU Chunhua;XU Zhongzi(College of Materials Science and Engineering,Nanjing Tech University,Nanjing 211816,China;Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites,Nanjing Tech University,Nanjing 211816,China;College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]南京工业大学材料科学与工程学院,南京211816 [2]南京工业大学,江苏先进无机功能复合材料协同创新中心,南京211816 [3]北京化工大学材料科学与工程学院,北京100029

出　　处：《涂料工业》2024年第9期16-22,共7页Paint & Coatings Industry

基　　金：江苏省自然科学基金面上项目(BK20191364)。

摘　　要：在聚氨酯主链中引入芳香族二硫键,制备了一种兼具高自修复率和高紫外吸收的自修复聚氨酯涂层。红外光谱、核磁共振氢谱、动态力学分析、力学测试及修复测试结果表明,R值为4时聚氨酯拥有优异的自修复效果,样条在120℃下加热15 min后断裂伸长率的修复率可达98.8%,涂层在120℃下加热5 min划痕完全修复。同时该聚氨酯涂层(膜厚100μm)对穿透力较强的UVA波段(320~400 nm)有着很强的屏蔽性能,透过率仅为0.07%。A self-healing polyurethane material combining high self-healing efficiency,excellent shape memory effect and high UV absorption was prepared by introducing aromatic disulfide bonds into the main chain of the polyurethane.The results of infrared and nuclear magnetic spectroscopy,dynamic mechanical analysis,mechanical test,shape memory and self-healing test showed that the polyurethane with an R value of 4 possessed excellent self-healing effect.The self-healing efficiency of the fracture elongation of the sample after heating at 120℃for 15 min was up to 98.8%,and the coating was heated at 120℃for 5 min to repair the scratches completely.At the same time,the polyurethane coatings performed a strong shielding performance for the UVA(320-400 nm),which had strong penetrating power,with a transmittance rate of only 0.07%.

关 键 词：聚氨酯 自修复 紫外屏蔽 

分 类 号：TQ637[化学工程—精细化工]