This study aims to prepare antibacterial coatings based on polyurethane and curcumin-modified graphene oxide. Curcumin-modified graphene oxide (GO-CU) as an antibacterial agent was prepared using the adsorption method. GO-CU was incorporated in polyurethane (PU) coatings at concentrations of 0.1 and 0.5 wt%. Synthesized GO-CU was characterized by Fourier transform infrared spectroscopy, UV–Vis spectroscopy, transmission scanning electron microscopy, and zeta potential measurement. Curcumin content in GO-CU was determined by thermogravimetric analysis. Antibacterial properties of GO-CU powder and PU coatings containing GO-CU were investigated by counting the colony-forming unit (CFU) of Escherichia coli (E. coli) strain. The results showed that curcumin was attached on GO-CU surface and curcumin content in GO-CU was about 32.9%. GO-CU provided a higher antibacterial effect against E. coli than GO. The antibacterial efficiency of PU coatings containing 0.1 wt% GO-CU was 85.8%; however, the increase in GO-CU concentration did not significantly increase the antibacterial efficiency of PU coating.

本研究旨在制备基于聚氨酯和姜黄素改性氧化石墨烯的抗菌涂层。使用吸附法制备了姜黄素修饰的氧化石墨烯（GO-CU）作为抗菌剂。GO-CU 以 0.1 和 0.5 wt% 的浓度掺入聚氨酯 (PU) 涂料中。合成的 GO-CU 通过傅里叶变换红外光谱、紫外-可见光谱、透射扫描电子显微镜和 zeta 电位测量进行表征。GO-CU 中的姜黄素含量通过热重分析确定。通过对大肠杆菌（E.coli ) 菌落形成单位 (CFU) 进行计数，研究了 GO-CU 粉末和含有 GO-CU 的 PU 涂料的抗菌性能） 拉紧。结果表明姜黄素附着在GO-CU表面，GO-CU中姜黄素含量约为32.9%。GO-CU 对大肠杆菌的抗菌作用比 GO 高。含有0.1 wt% GO-CU的PU涂料的抗菌效率为85.8%；然而，GO-CU 浓度的增加并没有显着提高 PU 涂层的抗菌效率。