中文摘要：

通过逐步聚合反应将异氰酸酯功能化石墨烯（IGN）接枝到水性聚氨酯（WPU）链段中,制备得到水性异氰酸酯改性石墨烯/聚氨酯纳米复合乳液（IGN/WPU）。通过傅里叶变换红外的光谱（红外光谱）、原子力显微镜（AFM）、扫描电镜（SEM）对氧化石墨烯（GO）、IGN、WPU及IGN/WPU复合材料的结构进行表征,并研究了IGN含量对复合乳液作为金属防腐涂层性能的影响。结果表明,随IGN含量增加,涂层硬度提高,水蒸气透过率下降,防腐效率增大。当m（IGN）=1%（质量分数）时,涂层硬度达到了2H,水蒸气透过率降低到51.98g/m^2·h,与空白样相比防腐效率提高了94.70%。

英文摘要：

Waterborne isocyanate functionalized graphene/polyurethane nanocomposite emulsion has been pre-pared through step by step polymerization reaction,which isocyanate functionalization of graphene is grafted to the water-borne polyurethane chain section.Fourier transform infared spectrometer （FT-IR）,atomic force mi-croscope （AFM）and scanning electron microscope （SEM）were used to characterize the structures of GO,IGN, WPU and IGN/WPU;the effect of IGN content on the properties of composite emulsion as metal anti-corrosion coating was systematically studied.The results show that hardness,barrier property to vapor and anticorrosive efficiency of the composite coating increases as IGN content is increasing.When m（IGN）=1wt%,the coating hardness up to 2 h,water vapor transmittance decreased to 51.98 g/（m^2·h）,anticorrosive efficiency increased by 94.70% compared with blank sample.