纳米二氧化硅和硅烷偶联剂共修饰氧化石墨烯增强环氧复合涂层的耐腐蚀性能。

Nano-SiO and Silane Coupling Agent Co-Decorated Graphene Oxides with Enhanced Anti-Corrosion Performance of Epoxy Composite Coatings.

机构信息

School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China.

出版信息

Int J Mol Sci. 2021 Oct 14;22(20):11087. doi: 10.3390/ijms222011087.

DOI:10.3390/ijms222011087

PMID:34681743

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8537813/

Abstract

Coatings are of great significance for irons and steels in regards to the harsh marine environment. Graphene oxides (GO) have been considered as an ideal filler material of epoxy coating. However, the undesired dispersion in the epoxy together with easy agglomeration and stacking remain great problems for practical application of GO composited epoxy coatings. A method that can effectively solve both self-aggregation and poor dispersion of GO is highly desired. Herein, we present a high dispersion strategy of graphene oxides in epoxy by co-decoration of nano-SiO and silane coupling agent. The co-decorated GO filled epoxy coating exhibits high anti-corrosion performance, including high electrochemical impedance, high self-corrosive potential, low self-corrosive current, and superior electrochemical impedance stability for ten days to Q235 carbon steel. This work displays new possibilities for designing novel coating materials with high performance toward practical marine anti-corrosion applications.

摘要

涂层对于铁和钢在恶劣的海洋环境中具有重要意义。氧化石墨烯（GO）已被认为是环氧树脂的理想填充材料。然而，在环氧树脂中不理想的分散以及容易团聚和堆积仍然是 GO 复合环氧树脂涂层实际应用的重大问题。因此，非常需要一种能够有效解决 GO 自团聚和分散不良的方法。在此，我们提出了一种通过纳米二氧化硅和硅烷偶联剂共修饰来提高氧化石墨烯在环氧树脂中分散性的方法。共修饰的 GO 填充的环氧树脂涂层表现出优异的耐腐蚀性能，包括高电化学阻抗、高自腐蚀电位、低自腐蚀电流以及对 Q235 碳钢十天的电化学阻抗稳定性。这项工作为设计具有高性能的新型涂层材料提供了新的可能性，可应用于实际的海洋防腐领域。