基于D-A反应的光固化自修复聚氨酯涂料及其性能研究

doi:10.7517/issn.1674-0475.180604

影像科学与光化学 ›› 2018, Vol. 36 ›› Issue (6): 489-497.DOI: 10.7517/issn.1674-0475.180604

基于D-A反应的光固化自修复聚氨酯涂料及其性能研究

曹建诚, 鲁富康, 刘敬成, 刘仁, 袁妍

江南大学化学与材料工程学院, 江苏无锡 214122

收稿日期:2018-06-21 修回日期:2018-09-11 出版日期:2018-11-15 发布日期:2018-11-15
通讯作者: 刘敬成
基金资助:
中央高校基本科研基金（JUSRP51719A）、江苏省研究生科研与实践创新计划项目（SJCX18_0619）和中国博士后基金项目（2016M601712）资助

Preparation and Properties of UV-cured Self-healing Polyurethane Coatings Based on Diels-Alder Reaction

CAO Jiancheng, LU Fukang, LIU Jingcheng, LIU Ren, YUAN Yan

School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu, P. R. China

Received:2018-06-21 Revised:2018-09-11 Online:2018-11-15 Published:2018-11-15

摘要/Abstract

摘要： 以对苯基亚甲基双马来酰亚胺（BMI）和糠醇（FA）为反应单体，通过Diels-Alder反应制备得到带羟基的改性DA单体，再以不同分子量的聚碳酸酯二元醇（PCDL）、异佛尔酮异氰酸酯（IPDI）、改性DA单体为反应单体，得到聚氨酯预聚物，然后与甲基丙烯酸羟乙酯（HEMA）反应得到光固化自修复聚氨酯。利用傅立叶红外光谱（FT-IR）、核磁共振氢谱（¹HNMR）等表征了树脂的结构，同时考察了树脂的光固化性能。再以聚氨酯树脂为基体树脂，通过配方设计制备了光固化自修复凃料。通过超景深显微镜和热重分析仪（TGA）对涂料的基本性能、自修复性能、热性能进行了测试，结果表明：随着PCDL分子量的增加，涂层的硬度有所下降，而DA单体的引入赋予涂层自修复性能的同时可以提高涂料的硬度。

关键词: 自修复, 光固化, Diels-Alder, 聚氨酯, 涂料

Abstract: N,N'-4,4'-Diphenylmethane-bismaleimide (BMI) and furfuryl alcohol (FA) were used to synthesize the modified DA monomers with hydroxyl groups through Diels-Alder reaction, and then use the polycarbonates diols (PCDL)with different molecular weights, isophorone isocyanate (IPDI) and modified DA monomers as reaction monomers to obtain a polyurethane prepolymer. Then the UV cured self-healing polyurethane were prepared by reaction of the prepolymer and hydroxyethyl methacrylate (HEMA). Fourier transform infrared (FT-IR) and nuclear magnetic resonance (¹HNMR) spectra were used to characterize the structure and double bond conversion of the self-healing polyurethane. In addition, the UV cured self-healing polyurethane coatings were prepared by designing a series of coating formulations with the polyurethane. The self-healing properties and thermal properties of the coatings were tested by ultra-deep-depth microscope and thermal gravimetric analyzer (TGA). The results showed that the hardness of the coatings decreased as the molecular weight of PCDL increased, and the introduction of the DA monomer imparts self-healing properties to the coating while increasing the hardness of the coating.

Key words: self-healing, UV-cured, Diels-Alder, polyurethane, coatings

曹建诚, 鲁富康, 刘敬成, 刘仁, 袁妍. 基于D-A反应的光固化自修复聚氨酯涂料及其性能研究[J]. 影像科学与光化学, 2018, 36(6): 489-497.

CAO Jiancheng, LU Fukang, LIU Jingcheng, LIU Ren, YUAN Yan. Preparation and Properties of UV-cured Self-healing Polyurethane Coatings Based on Diels-Alder Reaction[J]. Imaging Science and Photochemistry, 2018, 36(6): 489-497.

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基于D-A反应的光固化自修复聚氨酯涂料及其性能研究

Preparation and Properties of UV-cured Self-healing Polyurethane Coatings Based on Diels-Alder Reaction

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