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为了提高环氧树脂的力学性能,采用一步合成法制备得到氧化石墨烯(GO)-SiO2(GO-SiO2)杂化材料,利用扫描电子显微镜(SEM)对杂化材料的形貌进行表征,成功制得了具有三维结构的GO-SiO2杂化材料;将GO、SiO2颗粒和GO-SiO2以相同的含量(质量分数均为0.1%)添加到环氧树脂中制备复合材料,利用万能强力仪测试复合材料的拉伸性能,比较3种填料对树脂基复合材料拉伸性能的影响;再分别将质量分数为0.1%、0.3%和0.5%的GO-SiO2添加到环氧树脂中制备GO-SiO2/环氧树脂复合材料,比较不同质量分数的GO-SiO2对树脂基复合材料拉伸性能的影响;利用SEM对拉伸样条的断截面进行扫描测试,分析了不同种类和不同比例的填料对树脂基复合材料的增强增韧效果,并分析其增强增韧机制。结果表明:GO-SiO2的增强增韧效果明显优于GO和SiO2颗粒,当GO-SiO2的添加质量分数为0.3%时,其增强增韧效果最佳。
In order to improve the mechanical properties of epoxy resin, GO-SiO2 (GO-SiO2) hybrid material was prepared by one-step synthesis method. The morphology of the hybrid material was characterized by scanning electron microscopy (SEM) GO-SiO2 hybrid material with three-dimensional structure was prepared. GO, SiO2 particles and GO-SiO2 were added to epoxy resin at the same content (mass fraction of 0.1%) to prepare composite material, The tensile properties of the composites were compared. The tensile properties of the composites were compared among the three fillers. GO-SiO2 was added into the epoxy resin to prepare the GO-SiO2 / SiO2 composites with mass fraction of 0.1%, 0.3% and 0.5% Epoxy resin composites were prepared and the effects of GO-SiO2 with different mass fractions on the tensile properties of resin-based composites were compared. The cross-sections of the tensile splines were scanned by scanning electron microscope (SEM). The effects of different types and proportions of fillers on the resin Based composite materials to enhance the toughening effect, and analyze its enhanced toughening mechanism. The results show that the toughening effect of GO-SiO2 is better than that of GO and SiO2 particles. When the mass fraction of GO-SiO2 is 0.3%, the toughening effect of GO-SiO2 is the best.