Ha Manh Hung, Tran Minh Thi, Le Van Khoe, Le Minh Duc, Hoang Thi Tuyet Lan, Lai Thi Hoan, Vu Thi Xuan, Nguyen Thi Bich Viet, Ngo Xuan Luong, Nguyen Thuy Chinh, Thai Hoang, Vu Thi Hương, Vu Quoc Trung
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引用次数: 0
摘要
本研究通过原位电化学聚合合成了掺杂氧化石墨烯、钼酸盐和水杨酸盐的聚吡咯基纳米复合材料(PPy/GO/Mo/Sal),以提高聚合物涂层的防腐性能。采用SEM、EDX、FTIR、拉曼光谱和XRD对涂层的形貌和结构进行了表征。采用EIS动电位极化、盐雾试验和开路电位(OCP)测试,研究了涂层在0.1 M NaCl溶液中的防腐性能。结果表明:在PPy基体中同时添加钼酸盐/水杨酸盐和氧化石墨烯时,纳米复合涂层对低碳钢的防腐性能优于仅添加氧化石墨烯的涂层;与只掺杂水杨酸盐或水杨酸盐/氧化石墨烯的纳米复合材料相比,同时掺杂钼酸盐/水杨酸盐和氧化石墨烯的纳米复合材料在ocp -时间曲线上表现出最长的保护平台(约100 h),并有一些波动点被称为钼酸盐掺杂剂的自愈作用。在盐雾试验中,腐蚀电流(Tafel图)减小,阻抗(Bode图)增大,保护性能也有所提高。在这种情况下,涂层的抗腐蚀能力是通过屏障和自修复机制提供的。
Polypyrrole-based nanocomposites doped with both salicylate/molybdate and graphene oxide for enhanced corrosion resistance on low-carbon steel.
In this work, polypyrrole-based nanocomposites doped with graphene oxide, molybdate, and salicylate (PPy/GO/Mo/Sal) were synthesized via insitu electrochemical polymerization to enhance the anti-corrosion protection performance of polymer coatings. The morphology and structures of the coatings were characterized by SEM, EDX, FTIR, Raman spectroscopy, and XRD. The protection abilities of coatings against corrosion were investigated in 0.1 M NaCl solution with EIS potentiodynamic polarization, salt spray test, and open-circuit potential (OCP) measurements. The results showed that with the presence of both molybdate/salicylate and GO in the PPy matrix, the nanocomposite coating exhibited an excellent protection ability against corrosion for low-carbon steel, better than that with only GO as filler. Compared to the nanocomposites doped with only salicylate or salicylate/GO, the one doped with both molybdate/salicylate and GO exhibited the longest protection plateau (ca. 100 h) on the OCP-time curves with some fluctuation points known as the self-healing action of molybdate dopant. It also resulted in a decrease in the corrosion current (Tafel plots), a higher impedance (Bode plot), and a better protection performance in salt spray tests. In this case, the anti-corrosion ability of the coatings was provided through a barrier and self-healing mechanism.
期刊介绍:
Designed Monomers and Polymers ( DMP) publishes prompt peer-reviewed papers and short topical reviews on all areas of macromolecular design and applications. Emphasis is placed on the preparations of new monomers, including characterization and applications. Experiments should be presented in sufficient detail (including specific observations, precautionary notes, use of new materials, techniques, and their possible problems) that they could be reproduced by any researcher wishing to repeat the work.
The journal also includes macromolecular design of polymeric materials (such as polymeric biomaterials, biomedical polymers, etc.) with medical applications.
DMP provides an interface between organic and polymer chemistries and aims to bridge the gap between monomer synthesis and the design of new polymers. Submssions are invited in the areas including, but not limited to:
-macromolecular science, initiators, macroinitiators for macromolecular design
-kinetics, mechanism and modelling aspects of polymerization
-new methods of synthesis of known monomers
-new monomers (must show evidence for polymerization, e.g. polycondensation, sequential combination, oxidative coupling, radiation, plasma polymerization)
-functional prepolymers of various architectures such as hyperbranched polymers, telechelic polymers, macromonomers, or dendrimers
-new polymeric materials with biomedical applications