为了提高环氧树脂的低温力学性能,采用石墨烯与多壁碳纳米管(MWCNTs)协同改性环氧树脂,系统研究了石墨烯-MWCNTs/环氧树脂复合材料的室温(RT)和低温(77 K)力学性能.结果表明:当石墨烯的质量分数为0.1 wt％,MWCNTs的质量分数为0.5wt％时,纳米填料的加入可同时改善环氧树脂的低温拉伸强度、弹性模量和冲击强度;在此最佳含量下,石墨烯-MWCNTs/环氧树脂复合材料在RT和77 K时的拉伸强度皆达到最大值,比纯环氧树脂的拉伸强度分别提高了11.04％和43.78％.石墨烯和MWCNTs能协同提高环氧树脂的低温力学性能.
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