UPDHES电泳涂层材料的制备及其防腐性能

发布时间：2018-06-02 22:22

本文选题：双亲聚合物 + 光交联　；参考：《表面技术》2017年07期

【摘要】：目的研究电泳沉积条件及光交联对沉积胶束制备涂层形貌、性能的影响。方法首先通过自由基聚合制备可光交联双亲性丙烯酸酯共聚物(UPDHES),通过全反射红外、氢核磁共振(1H-NMR)对共聚物进行结构表征。然后,将可光交联双亲性丙烯酸酯共聚物在选择性溶剂中自组装形成胶束纳米粒子溶液,利用纳米粒度分析仪、透射电子显微镜(TEM)对胶束粒子的粒径和形貌进行表征。最后,以上述胶束溶液为沉积液,控制不同沉积条件,通过电泳沉积在316L不锈钢表面制备光交联涂层,利用扫描电子显微镜(SEM)、原子力显微镜(AFM)研究了电泳沉积条件及光交联对涂层形貌及性能的影响。同时,通过电化学工作站研究不同条件制备的涂层在1 mol/L HCl中的耐腐蚀性能。结果当沉积电压为5 V、沉积时间为3min时,电泳沉积制备的涂层表面光滑,具有较好的致密性和均一性,此时涂层的自腐蚀电位为-0.36 V,远高于不锈钢(-0.43 V),耐腐蚀性能最优。光交联后,涂层的附着力由2级增加至1级,自腐蚀电位增加至-0.34 V,耐腐蚀性进一步提高。结论电泳沉积胶束制备光交联涂层过程中,沉积时间、沉积电压均存在一最优值,此时制备的涂层结构完整,耐腐蚀性能最好。光交联可进一步提高涂层的耐腐蚀性能。
[Abstract]:Aim to study the effect of electrophoretic deposition conditions and photocrosslinking on the morphology and properties of the coatings prepared by the deposition of micelles. Methods the photocrosslinked amphiphilic acrylate copolymer was prepared by radical polymerization. The structure of the copolymer was characterized by total reflectance infrared spectroscopy (TIR) and 1H-NMRs. Then the optically crosslinked amphiphilic acrylate copolymer was self-assembled in a selective solvent to form a micellar nanoparticles solution. The particle size and morphology of the micellar particles were characterized by nano-particle size analyzer and transmission electron microscope (TEM). Finally, the photocrosslinked coating was prepared on the surface of 316L stainless steel by electrophoretic deposition with the above micellar solution as the deposition solution and controlling the different deposition conditions. The effects of electrophoretic deposition conditions and photocrosslinking on the morphology and properties of the coatings were investigated by scanning electron microscopy (SEM) and atomic force microscopy (AFM). At the same time, the corrosion resistance of coatings prepared under different conditions in 1 mol/L HCl was studied by electrochemical workstation. Results when the deposition voltage was 5 V and the deposition time was 3min, the surface of the coating prepared by electrophoretic deposition was smooth and had good compactness and uniformity. The self-corrosion potential of the coating was -0.36 V, which was much higher than that of stainless steel (-0.43 V), and the corrosion resistance of the coating was the best. After photocrosslinking, the adhesion of the coating was increased from grade 2 to grade 1, and the corrosion potential increased to -0.34 V, and the corrosion resistance was further improved. Conclusion in the process of preparing photocrosslinked coatings by electrophoretic deposition, there is an optimum value of deposition time and deposition voltage, and the structure of the coatings is complete and the corrosion resistance is the best. Photocrosslinking can further improve the corrosion resistance of the coating.
【作者单位】：江南大学材料科学与工程学院;
【基金】：国家自然科学基金(51573073)~~
【分类号】：TG174.46

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