Herein, an ionic liquid–graphene oxide hybrid nanomaterial was prepared via a facile grafting reaction between an imidazole ionic liquid and graphene oxide. FTIR, Raman, and XPS spectra demonstrated that imidazole ionic liquids were successfully covalently attached to the surface of graphene oxide nanosheets. The resulting hybrid nanomaterial, with a thickess of ca. 3 nm, can be stably dispersed in water. Results obtained from electrochemical impedance spectroscopy revealed that ionic liquid–graphene oxide hybrids effectively improved the anticorrosion performance of epoxy-based waterborne coatings. Moreover, ionic liquids performed two functions: (a) they facilitated the dispersion of graphene in a polymer matrix and then utilized the impermeable barrier capability of graphene and (b) they endowed the graphene sheets with a corrosion inhibition effect. The scanning vibrating electrode technique combined with electrochemical tests proved that the enhanced protective performance of the as-prepared composite coatings was attributed to the synergistic effect of the impermeable property of graphene nanosheets and the inhibitory function of the imidazole-based ionic liquid.

中文翻译：

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离子液体-氧化石墨烯杂化纳米材料：合成和防腐应用†

在本文中，通过咪唑离子液体和氧化石墨烯之间的容易接枝反应制备了离子液体-氧化石墨烯杂化纳米材料。FTIR，拉曼光谱和XPS光谱表明，咪唑离子液体已成功地共价附着于氧化石墨烯纳米片的表面。所得的杂化纳米材料，其厚度约为。3 nm，可以稳定地分散在水中。电化学阻抗谱的结果表明，离子液体-氧化石墨烯杂化物有效地改善了环氧水性涂料的防腐性能。此外，离子液体具有两种功能：（a）促进石墨烯在聚合物基质中的分散，然后利用石墨烯的不可渗透的阻挡能力，（b）赋予石墨烯片材腐蚀抑制作用。扫描振动电极技术与电化学测试相结合证明，所制备的复合涂层的防护性能增强是由于石墨烯纳米片的不渗透性与咪唑基离子液体的抑制作用的协同作用。