表面官能化对碳纳米管/环氧复合材料玻璃化转变温度及韧性的影响

通过碳纳米管的不同表面官能化，构造其与环氧树脂的不同界面。采用动态机械性能分析研究不同表面官能化碳纳米管对环氧树脂复合材料玻璃化转变温度的影响；采用摆锤冲击试验研究环氧树脂复合材料的韧性。结果表明：与纯环氧树脂相比，氨基化碳纳米管/环氧树脂复合材料的玻璃化转变温度升高，而羧基化碳纳米管/环氧树脂复合材料的玻璃化转变温度反而有所下降；碳纳米管/环氧树脂复合材料的冲击强度相比纯环氧树脂均提高了近一倍。复合材料性能的这些变化规律主要归因于不同表面官能化碳纳米管与环氧树脂基体间形成了不同的界面。
Different interphases between the carbon nanotubes and the epoxy resin were constructed through the organic functionalization of carbon nanotubes. Effects of different functionalized carbon nanotubes on the glass transition temperature of the epoxy resin composites were investigated by using the dynamic mechanical analysis method; the roughness of epoxy resin composites was studied in the pendulum impact test. Results show that: the glass transition temperature of the composites with amination carbon nanotube is the highest, while that of the composites with carboxylation carbon nanotube is lower than that of the pure epoxy resin; toughness of the composites with embedded carbon nanotubes is doubled. These variation laws in the properties are attributed to the different interphases formed between the functionalized carbon nanotubes and epoxy resin matrixes.