In the current report, surface modification of hydroxylated multi-walled carbon nanotubes (OH-MWCNTs) was done by silanization with 3-aminopropyltriethoxysilane (APTS) and dipodal silane (DSi). Then, rigid polyurethane (PU) foam nanocomposites were prepared by silanized MWCNTs to investigate the effects of the silane-modified MWCNTs on the mechanical, thermal, and morphological properties of the nanocomposites. Morphological studies showed that the addition of silanized MWCNTs to the PU matrix increases the cell density of nanocomposites. The obtained data from SEM analysis also showed the nanoparticles dispersion for 1.5 wt% of DSi-MWCNT (dipodal silane - MWCNT) loading when compared to same loading level of Si-MWCNT (APTS - MWCNT) and resulted in improved mechanical properties of nanocomposites. The results of mechanical tests showed that the Young’s moduli as well as tensile strengths were improved due to the presence of strong interfacial interaction between the PU matrix and the nanotubes in PU nanocomposites.

在当前的报告中，羟基化的多壁碳纳米管（OH-MWCNTs）的表面改性是通过使用3-氨丙基三乙氧基硅烷（APTS）和二足硅烷（DSi）进行硅烷化来完成的。然后，通过硅烷化的MWCNT制备硬质聚氨酯（PU）泡沫纳米复合材料，以研究硅烷改性的MWCNT对纳米复合材料的机械，热学和形态学性能的影响。形态学研究表明，将硅烷化的MWCNTs添加到PU基质中会增加纳米复合材料的细胞密度。从SEM分析获得的数据还显示，与相同载量的Si-MWCNT（APTS-MWCNT）相比，载有1.5 wt％DSi-MWCNT（二足硅烷-MWCNT）的纳米颗粒分散体，并改善了纳米复合材料的机械性能。