定向石墨烯复合防腐涂层的研究现状

Research status of oriented graphene composite corrosive coatings

摘要:

由于溶液共混法、原位聚合法等制备方法的局限性,石墨烯在涂层内部的无序随机排布已经成为了阻碍石墨烯复合防腐涂层性能提升的重要瓶颈问题。于是,一大批学者从石墨烯定向排序的角度出发,在拓扑结构优化、定向排布策略和定向排布对涂层防腐性能的影响等方面开展了大量的研究工作。本文首先介绍了石墨烯拓扑优化的理论研究,梳理了已报道的几种复合涂层屏蔽性能模型。接着,总结了已报道的石墨烯定向调控策略,详细阐述了基于电场和磁场的外场调控法,介绍了层层、蒸发诱导和抽滤诱导等自组装法,分析了两类调控策略的优劣势。然后,总结了石墨烯定向排布对于复合防腐涂层阻抗和服役寿命的影响规律。最后,概括了定向石墨烯复合防腐涂层在工业化应用中尚待探索与解决的若干问题。

Abstract:

Due to the limitations of traditional preparation processes such as solution blending, in-situ polymerization and so on, the disordered random arrangement of graphene in organic coatings has become an important bottleneck problem. Therefore, many scholars are denoted from the perspective of graphene orientation sequencing. A lot of research work has been carried out in the fields of topology optimization, directional arrangement technology, effects of directional arrangement on corrosion resistance of coating and so on. In this paper, the theoretical research of graphene topological optimization is introduced in detail, and the evolution history of the shielding performance model of composite coatings is summarized. Then, the reported directional regulation strategies of graphene are summarized. the regulation preparation based on electric field and magnetic field are elaborated. The reported layer-by-layer self-assembly method, evaporation-induced self-assembly method and filtration-induced self-assembly method to prepare oriented graphene composite coatings are introduced, and their advantages and disadvantages are analyzed. Then, the influences of oriented graphene on resistance and service life of composite anticorrosive coatings have been summarized. Finally, the research direction and some problems to be solved in industrial application of oriented graphene composite coatings are discussed.