电场诱导多壁碳纳米管有序排列对多壁碳纳米管/环氧树脂复合材料性能的影响

采用交流（AC）电场诱导法制备了多壁碳纳米管（MWCNTs）均匀分散且定向有序排列的MWCNTs/环氧树脂复合材料。采用SEM、偏振拉曼光谱等研究了电场强度、MWCNTs含量、加电时间及温度（黏度）等因素对MWCNTs定向排列的影响，讨论了MWCNTs有序排列对MWCNTs/环氧树脂复合材料电学和力学性能的影响。结果表明：MWCNTs沿电场方向有序排列；MWCNTs/环氧树脂复合材料施加AC电场后的拉曼强度明显高于未施加电场的情况；当MWCNTs含量从0wt%增加到0.025wt%时，MWCNTs/环氧树脂复合材料导电率从2.3×10^-12 S/cm增加到1.3×10^-8 S/cm，增加了约4个数量级；MWCNTs含量为2.5wt%时，MWCNTs/环氧树脂复合材料拉伸强度提高了26.3%。

Effect of aligned multiwalled carbon nanotubes induced by electric field on properties of multiwalled carbon nanotubes/epoxy resin composites

The uniformly dispersed and aligned multiwalled carbon nanotubes (MWCNTs)/epoxy resin composite was prepared by alternating current (AC) electric field induction method. The effects of electric field intensity, MWCNTs content, applying electric field time and temperature (viscosity) on the alignment of MWCNTs were studied by SEM and polarization Raman spectroscop.The influence of MWCNTs alignment on the electrical and mechanical properties of MWCNTs/epoxy resin composites was discussed. The results show that the MWCNTs are aligned in the direction of electric field, the Raman intensity of MWCNTs/epoxy resin composites after being exposed to the electric field is significantly higher than that of the unapplied electric field. When MWCNTs content increases from 0wt% to 0.025wt%, the electrical conductivity increases from 2.3×10^-12 S/cm to 1.3×10^-8 S/cm by about 4 orders of magnitude. The tensile-shear strength of MWCNTs/epoxy resin composites increases by 26.3%, when MWCNTs content is 2.5wt%.