In this work, the preparation of the graphene/epoxy resin composite and its corrosion protection on the copper substrate were presented. The 1,8-diaminooctane-grafted-graphene (1,8-D-g-G) was synthesized using the carboxyl functional graphite and 1,8-diaminooctane by a one-pot process under ultrasonication in supercritical CO₂. The structure and morphology of the as-prepared samples characterized by FTIR, XPS, TEM, AFM, and SEM confirmed that the graphite was exfoliated into the graphene and the latter reacted with the 1,8-diaminooctane via amidation to form the 1,8-D-g-G. The graphene/epoxy resin composite was readily achieved by the reaction of the epoxy resin with the 1,8-D-g-G. The electrochemical and salt spray tests were applied to assess the corrosion protection of the composite coating on the copper substrate. The results demonstrated that the composite exhibited excellent corrosion protection. Also, the mechanism of the co-occurred exfoliating process and the amidation reaction in one-pot under ultrasonication in supercritical CO₂ was explored.

在这项工作中，提出了石墨烯/环氧树脂复合材料的制备及其在铜基底上的腐蚀防护。在超临界CO _2中，通过一锅法，使用羧基官能团石墨和1,8-二氨基辛烷，通过羧基合成了1,8-二氨基辛烷接枝石墨烯（1,8-DgG）。。FTIR，XPS，TEM，AFM和SEM表征的制备样品的结构和形态证实，石墨被剥落成石墨烯，后者通过酰胺化与1,8-二氨基辛烷反应形成1,8 -DgG。通过使环氧树脂与1，8-DgG反应，可以容易地获得石墨烯/环氧树脂复合材料。进行了电化学和盐雾测试，以评估铜基板上复合涂层的腐蚀防护性能。结果表明该复合材料表现出优异的腐蚀防护性能。同时，探讨了超临界CO ₂超声下一锅共剥落过程和酰胺化反应的机理。