基于pH敏感缓蚀剂微胶囊的自修复涂层的制备及对碳钢的腐蚀防护作用研究  

Preparation of self-healing coating using pH-sensitive corrosion inhibitor loaded microcapsules and study on its anticorrosion property on carbon steel

作　　者：张姗姗[1] 郑兴荣[1] 杨艳玲[1] 闫峥 张英超[1] 冯丽娟[1] ZHANG Shanshan;ZHENG Xingrong;YANG Yanling;YAN Zheng;ZHANG Yingchao;FENG Lijuan(Weifang University of Science and Technology,Weifang 262700,China)

机构地区：[1]潍坊科技学院,山东潍坊262700

出　　处：《电镀与涂饰》2023年第2期41-47,共7页Electroplating & Finishing

基　　金：山东省自然科学基金项目“基于智能释放缓蚀剂胶囊的聚丙烯酸酯自修复涂层构建”(ZR2019MEM046)。

摘　　要：以丙烯酸、丙烯酰胺和丙烯酸乙酯为单体合成了一种具有pH敏感性的聚合物,并以此负载磷酸二氢钾,形成缓蚀剂微胶囊,再将其与水性丙烯酸涂料复合,制备出了一种环保型自修复涂层。通过傅里叶变换红外光谱分析和Zeta电位测定,考察了微胶囊与涂料的相容性,采用扫描电镜观察自修复涂层的形貌特征,借助电化学阻抗谱和中性盐雾试验来评价自修复涂层对R235碳钢的腐蚀防护作用。结果表明:缓蚀剂微胶囊与涂料基体的相容性良好,可以均匀地分散于涂料中,形成的涂层表现出优异的自修复作用,能够显著提高对碳钢的腐蚀防护性能。A pH-sensitive polymer was synthesized with acrylic acid,acrylamide,and ethyl acrylate as monomers,and then loaded with potassium dihydrogen phosphate,forming a corrosion inhibitor loaded microcapsule.An environment-friendly self-healing coating was prepared by the combination of a waterborne acrylic paint and the corrosion inhibitor loaded microcapsule.The compatibility between the microcapsule and coating was examined by Fourier-transform infrared spectroscopy and Zeta potential measurement.The morphology of the self-healing coating was observed by scanning electron microscopy.The anticorrosion property of the self-healing coating on R235 carbon steel was evaluated by electrochemical impendence spectroscopy and neutral salt spray test.The results showed that the corrosion inhibitor loaded microcapsule had good compatibility with the coating matrix and distributed uniformly in it.The coating containing the corrosion inhibitor loaded microcapsules showed good self-healing performance and provided better corrosion protection for carbon steel.

关 键 词：自修复涂层 微胶囊 缓蚀剂 水性丙烯酸涂料 碳钢 防腐蚀 

分 类 号：TQ630[化学工程—精细化工]