In this study, a carboxymethyl chitosan functionalized graphene (CMCS-rGO) nanomaterial was successfully synthesized in aqueous solution by non-covalent functionalization method. Fourier transform infrared, Raman, ultraviolet visible spectroscopy and thermogravimetric analysis confirmed that carboxymethyl chitosan had been successfully anchored on the surface of graphene. In addition, the CMCS-rGO was used as an anticorrosive nanofiller to be added to waterborne epoxy (EP) coatings to protect steel substrates. The corrosion protection behavior of all coatings was tested by electrochemical workstation, and the results proved that the incorporation of well-dispersed CMCS-rGO nanomaterials could significantly improve the anti-corrosion performance of waterborne epoxy coatings. Furthermore, even after 180 days of immersion, the impedance modulus value of the 0.2% CMCS-rGO/EP at |Z|_f =0.01 Hz was still approximately 2 orders of magnitude higher than that of the EP.

在这项研究中，通过非共价官能化方法成功地在水溶液中合成了羧甲基壳聚糖官能化石墨烯（CMCS-rGO）纳米材料。傅里叶变换红外，拉曼光谱，紫外可见光谱和热重分析证实羧甲基壳聚糖已成功锚固在石墨烯表面。此外，CMCS-rGO还用作防腐纳米填料，可添加到水性环氧（EP）涂料中以保护钢基材。通过电化学工作站测试了所有涂料的防腐性能，结果证明掺入分散良好的CMCS-rGO纳米材料可以显着提高水性环氧涂料的防腐性能。此外，即使在浸泡180天后，_f = 0.01 Hz仍比EP高约2个数量级。