仿贻贝粘附蛋白聚合物的合成及其防腐机理研究  

Synthesis and Inhibition Mechanism of Mussel-inspired Adhesive Polymers in Waterborne Coatings on Carbon Steel

作　　者：杨名亮 吴建华 李至秦[2] 苏雅丽 方大庆 郑添水 YANG Ming-liang;WU Jian-hua;LI Zhi-qin;SU Ya-li;FANG Da-qing;ZHENG Tian-shui(School of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China;State Key Laboratory for marine Corrosion and Protection,Qingdao 266101,China;Xiamen Sunrui Ship Coating Co.,Ltd,Xiamen 361101,China)

机构地区：[1]哈尔滨工程大学材料科学与化学工程学院,哈尔滨150001 [2]厦门双瑞船舶涂料有限公司,福建厦门361101 [3]海洋腐蚀与防护国防科技重点实验室,山东青岛266101

出　　处：《表面技术》2018年第8期211-219,共9页Surface Technology

基　　金：“十二五”科技支撑计划项目(2014BAE12B01);中国-瑞典联合研发项目(OS2014GR0462)

摘　　要：目的合成水性含多巴胺功能基团的仿贻贝粘附蛋白聚合物(PHEA-DOPA),研究在水性环氧涂层中的腐蚀防护机理。方法通过聚琥珀酰亚胺与乙醇胺和多巴胺的连续氨解反应,成功制备了PHEA-DOPA粘附聚合物,并用红外光谱(FTIR)仪、核磁(1HNMR)共振波谱仪和紫外-可见分光光度计对其结构进行了表征。通过电化学阻抗谱(EIS)、扫描电子显微镜(SEM)、石英晶体微天平(QCM-D)和拉曼光谱,对含有PHEA-DOPA的水性环氧涂层在碳钢表面的防护性能与机理进行了研究。结果红外光谱、核磁光谱和紫外-可见光谱结果表明,成功合成了PHEA-DOPA聚合物。EIS和SEM结果表明,PHEA-DOPA的加入能够明显提高涂层的防护性能。QCM-D和拉曼光谱结果表明PHEA-DOPA的防腐机理为:PHEA-DOPA结构中的DOPA基团与Fe离子有较强的吸附络合作用,并在碳钢表面和涂层内部反应生成不溶性的[Fe(DOPA)3]3+络合物,可抑制铁的溶解过程,提高涂层的致密性。结论 PHEA-DOPA粘附聚合物的加入能够明显提高涂层的防护性能。The work aims to study corrosion prevention mechanism of synthesized waterborne PHEA-DOPA containing dopamine pendant functional groups in waterborne epoxy anticorrosive coatings.A PHEA-DOPA adhesive polymer was successfully prepared based upon continuous aminolysis reactions among polysuccinimide,ethanolamine and dopamine.Structure of this adhesive polymer was characterized by FTIR,1HNMR and UV-Vis spectrophotometer.Furthermore,protective properties and mechanism of the waterborne epoxy coating containing PHEA-DOPA were investigated by EIS,scanning electron microscope(SEM),quartz crystal microbalance with dissipation monitoring(QCM-D)and Raman microspectroscopy.The results of FTIR,1HNMR and UV-Vis measurements demonstrated that the PHEA-DOPA polymer was successfully synthesized.The EIS and SEM results indicated that the addition of PHEA-DOPA could significantly improve protection properties of waterborne epoxy coatings.The evidences of QCM-D and Raman microspectroscopy demonstrated that the DOPA group in PHEA-DOPA structure had strong adsorptive complex effects on Fe^3+,and could generate in soluble[Fe(DOPA)3]^3+complexes on the surface of carbon steel and inside the coatings,which inhibited dissolution process of Fe and improved coating density.Addition of PHEA-DOPA adhesive polymer can significantly improve protective properties of waterborne coatings.

关 键 词：仿贻贝粘附蛋白 粘附聚合物 合成 缓蚀剂 环氧涂层 

分 类 号：TQ630.4[化学工程—精细化工]