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- 2015
不同官能化碳纳米管对MWCNTs-碳纤维/环氧树脂复合材料力学性能的影响
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Abstract:
为研究加入不同官能化碳纳米管对环氧树脂力学性能的影响, 通过对羧基化多壁碳纳米管(MWCNTs-COOH)进行化学处理, 得到表面接枝乙二胺的碳纳米管(MWCNTs-EDA)。分别将MWCNTs-COOH和MWCNTs-EDA分散在环氧树脂中, 通过热熔法制备环氧树脂中含有碳纳米管的T700碳纤维预浸料, 并热压成准各向同性复合材料层合板。结果表明: MWCNTs-EDA在环氧树脂中的分散性优于MWCNTs-COOH, MWCNTs-EDA本身具有固化反应活性, 加入后对基体的交联密度影响较小。与MWCNTs-COOH相比, MWCNTs-EDA可以有效改善环氧树脂及碳纤维/环氧树脂复合材料的力学性能。当MWCNTs-EDA含量为1.0wt%时, MWCNTs-碳纤维/环氧树脂准各向同性复合材料层合板的压缩性能、弯曲性能和冲击后压缩强度分别提高了14.7%、40.9%和20.6%。 In order to study the effects of adding different functionalized carbon nanotubes on mechanical properties of epoxy, multi-walled carbon nanotubes with reactive amino groups(MWCNTs-EDA) were prepared by chemical processing on MWCNTs-COOH. MWCNTs-COOH and MWCNTs-EDA were dispersed in epoxy. T700 carbon fiber prepreg which epoxy containing carbon nanotubes was successfully produced by hot-melt method and then the quasi isotropic composite laminates were prepared. The results confirm that MWCNTs-EDA has better dispersion than MWCNTs-COOH. MWCNTs-EDA itself has curing reaction activity and exhibites a little effect on crosslinking density of matrix. Compared with MWCNTs-COOH, MWCNTs-EDA is more effective in enhancing the mechanical performance of epoxy and carbon fiber/epoxy composites. When the content of MWCNTs-EDA is 1.0wt%, the compression properties, flexural properties and compression strength after impact (CAI) of quasi isotropic MWCNTs-carbon fiber/epoxy composite laminates can be increased by 14.7%, 40.9% and 20.6%, respectively. 国家自然科学基金(51073019)
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