水性异氰酸酯改性石墨烯/聚氨酯复合乳液防腐性能研究  

Synthesis and anticorrosive properties of waterborne isocyanate functionalized graphene/polyurethane nanocomposite emulsion

作　　者：朱科[1] 李小瑞[1] 李菁熠[1,2] 费贵强 王佼[1] 

机构地区：[1]陕西科技大学化学化工学院,教育部轻化工助剂化学与技术重点实验室,西安710021 [2]渭南师范学院,陕西渭南714099

出　　处：《功能材料》2016年第6期16-21,28,共7页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21204046;51373091);陕西省教育厅重点实验室资助项目(13JS018;14JS014)

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/m2·h,与空白样相比防腐效率提高了94.70%。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.

关 键 词：水性聚氨酯 石墨烯 复合材料 金属防腐 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]