纳米纤维包覆3,4,5-三羟基苯甲酸丙二醇酯自修复涂层防腐蚀机理的研究  

Corrosion Prevention Mechanism of Self-healing Coatings with Core-shell Electrospun Fibres Containing 3,4,5-Trihydroxybenzoate Propylene Glycol Ester

作　　者：程庆利 董邯海 宋立英 徐宁静 李振兴[2] Cheng Qingli;Dong Hanhai;Song Liying;Xu Ningjing;Li Zhenxing(SINOPEC Research Institute of Safety Engineering Co.,Ltd.,Qingdao,Shandong 266000,China;College of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266000,China)

机构地区：[1]中石化安全工程研究院有限公司,青岛266000 [2]山东科技大学安全与环境工程学院,青岛266000

出　　处：《涂料工业》2022年第5期11-17,23,共8页Paint & Coatings Industry

摘　　要：针对海洋环境中防腐涂层微裂缝难以发现、修复不及时而导致涂层服役寿命缩短这一问题,制备了纳米纤维包覆3,4,5-三羟基苯甲酸丙二醇酯(没食子酸酯)的自修复涂层。采用扫描电镜和透射电镜对纳米纤维进行了表征,在3.5%NaCl溶液中模拟了含没食子酸酯纳米纤维的涂层在碳钢表面的自修复过程,最终通过电化学测试评价了涂层的自修复性能,并分析了修复机理。结果显示:纳米纤维具有核壳结构,电纺纤维的壳层厚度约为149 nm,芯层厚度约为354 nm。合成的没食子酸酯与基底金属表面铁离子反应,可形成稳定的Fe—O—C化合物,制备的防腐涂层对微裂缝具有一定的自修复能力。In view of the problems that the service life of coating was shortened due to the difficulty in finding micro-cracks in marine environment.A self-healing coating with electrospun nanofibers encapsulating 3,4,5-trihydroxybenzoate propylene glycol ester was successfully prepared.The nanofibers were characterized by SEM and TEM.The self-healing process of the coating with 3,4,5-trihydroxybenzoate propylene glycol ester nanofibers coated on the carbon steel surface was simulated in 3.5 wt%NaCl solution.The self-repairing abilities were evaluated by the electrochemical measurement technology and a healing mechanism was analyzed.SEM and TEM showed that the nanofibers were core-shell structure.The shell thickness of the nanofibers was about 149 nm,and the core thickness was about 354 nm.The 3,4,5-trihydroxybenzoate propylene glycol ester could react with iron ions to form stable Fe-O-C compound.The prepared anticorrosive coating owned certain self-healing ability.

关 键 词：自修复 静电纺丝 纳米纤维 螯合反应 3 4 5-三羟基苯甲酸丙二醇酯 

分 类 号：TQ635.2[化学工程—精细化工]