In this study, we examine the effect of multi-wall carbon nanotubes (MWCNT) morphology on electrical and mechanical properties of MWCNT-filled polyurethane (PU) nanocomposites. The main objective of this study is to understand the role of aspect ratio and length of MWCNTs in determining the performance of nanocomposites. Highly aligned MWCNTs were prepared by aerosol-assisted chemical vapour deposition method and compared to commercially available MWCNTs in PU matrix for ease of dispersibility and performance. We observed opposing influence of the MWCNT on electrical and mechanical behaviour of the nanocomposites. The electrical properties were proportional to length of the MWCNTs whereas the mechanical properties were dependent on the aspect ratio of the MWCNTs. Moreover, thicker nanotubes (approximately 40 nm) with a higher aspect ratio (approximately 225) are less prone to shortening and impart better tensile and storage modulus along with improved electrical and therefore are more suitable for the MWCNT nanocomposites.

在这项研究中，我们研究了多壁碳纳米管（MWCNT）形态对MWCNT填充聚氨酯（PU）纳米复合材料的电气和机械性能的影响。这项研究的主要目的是了解长宽比和MWCNT的长度在确定纳米复合材料性能中的作用。通过气溶胶辅助化学气相沉积法制备了高度取向的MWCNT，并与PU基质中的市售MWCNT进行了比较，以简化分散性和性能。我们观察到纳米碳管对纳米复合材料的电气和机械行为的不利影响。电性能与MWCNT的长度成比例，而机械性能取决于MWCNT的长宽比。而且，