In this work, the effect of inclusion of 0.5 to 2 wt% multiwalled carbon nanotubes (MWCNT) in epoxy on the performance of the epoxy-carbon fabric (CF) composites is analyzed. High-resolution transmission electron microscopy (HRTEM) correlated the dispersion of the nanofillers and morphology of the nanocomposites. The tensile and fracture properties of the composites improved significantly with MWCNT content. Beyond 1 wt%, the properties declined in both nano- and multiscale composites due to the agglomeration of MWCNTs. The wear rate showed a decreasing trend with increase in MWCNT content. The incorporation of MWCNTs resulted in a positive shift in the glass transition temperature (T_g) of the nanocomposites. The complex network formed between MWCNT and CF severely impeded the segmental mobility of the polymer chains which improved the storage modulus of the composites. From the tensile fracture surface analysis, the failure pattern of multiscale composites is found to be relatively ductile in comparison with epoxy-CF composites.

在这项工作中，分析了在环氧树脂中包含 0.5 至 2 wt% 的多壁碳纳米管 (MWCNT) 对环氧树脂-碳织物 (CF) 复合材料性能的影响。高分辨率透射电子显微镜 (HRTEM) 将纳米填料的分散与纳米复合材料的形态相关联。复合材料的拉伸和断裂性能随着 MWCNT 含量的增加而显着提高。超过 1 wt%，由于 MWCNT 的团聚，纳米级和多级复合材料的性能都会下降。随着MWCNT含量的增加，磨损率呈下降趋势。MWCNT 的掺入导致玻璃化转变温度 ( T _g) 的纳米复合材料。MWCNT和CF之间形成的复杂网络严重阻碍了聚合物链的链段移动性，从而提高了复合材料的储能模量。从拉伸断裂表面分析，发现多尺度复合材料的破坏模式与环氧-CF 复合材料相比具有相对延展性。