氧化石墨烯-SiO_2杂化材料对环氧树脂拉伸性能的影响

Effects of graphene oxide-SiO_2 hybrid materials on tensile properties of epoxy

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,one-step synthesis method was used to obtain graphene oxide(GO)-SiO2(GO-SiO2)hybrid materials.SEM confirmed that three dimensional GO-SiO2 hybrid materials were prepared successfully.GO,SiO2 and GO-SiO2 with the same content of 0.1% mass fraction were added into epoxy to prepare composites.Universal strength tester was used to test the tensile performance of the composites,and the effects of three types of fillers on tensile performance of the resin matrix composites were compared.Then different contents with 0.1%,0.3%and 0.5% mass fraction of the GO-SiO2 were added into epoxy to prepare GO-SiO2/epoxidation composites,and the effects of different contents of GO-SiO2 on the tensile perpormance of resin matrix composites were compared.SEM was used to test the fracture cross-section of tensile specimen,and the reinforcing and toughening effect of different kinds and contents of fillers on the resin matrix composites were analyzed,and the reinforcing and toughening mechanism was analyzed.Results show that the reinforcing and toughening effect of GO-SiO2 is much better than GO and SiO2 particles,and when the mass fraction of GO-SiO2 is 0.3%,the reinforcing and toughening effect is the best.