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功能化碳纳米管/环氧树脂复合材料性能研究

, PP. 97-102

Keywords: 环氧树脂,碳纳米管,增韧机理,力学性能,介电性能

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Abstract:

采用羧基功能化碳纳米管(C-MWNTs)和环氧基功能化碳纳米管(E-MWNTs)改性环氧树脂。利用扫描电子显微镜观察碳纳米管功能化前后的形貌变化,分析碳纳米管/环氧树脂纳米复合材料的冲击断面形貌,测试了复合材料的力学性能和介电性能。结果表明环氧基功能化碳纳米管与环氧树脂基体作用力更强,当E-MWNTs和C-MWNTs在复合材料中的掺杂量分别达到1.0wt%和0.7wt%时,E-MWNTs/EP复合材料和C-MWNTs/EP复合材料的冲击强度较未掺杂环氧树脂分别提高了52.2%和39.9%,当碳纳米管掺杂量为0.7wt%时,两体系的弯曲强度与未掺杂环氧相比分别提高了35%和26%。探讨了碳纳米管增韧环氧树脂的机理。不同方法处理的碳纳米管对环氧树脂复合材料的介电常数和介电损耗影响程度不同。

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