Ray Suprakas Sinha, Vaudreuil Sébastien, Maazouz Abderrahim, Bousmina Mosto
Department of Chemical Engineering, Laval University (CREPEC), Quebec, Canada.
J Nanosci Nanotechnol. 2006 Jul;6(7):2191-5. doi: 10.1166/jnn.2006.368.
This communication describes the preparation, characterization and properties of biodegradable poly(butylene succinate) (PBS)/multi-walled carbon nanotubes (MWCNTs) nanocomposite. Nanocomposite was prepared by melt-blending in a batch mixer and the amount of MWCNTs loading was 3 wt%. State of dispersion-distribution of the MWCNTs in the PBS matrix was examined by scanning and transmission electron microscopic observations that revealed homogeneous distribution of stacked MWCNTs in PBS matrix. The investigation of the thermomechanical behavior was performed by dynamic mechanical thermal analysis. Results demonstrated substantial enhancement in the mechanical properties of PBS, for example, at room temperature, storage flexural modulus increased from 0.64 GPa for pure PBS to 1.2 GPa for the nanocomposite, an increase of about 88% in the value of the elastic modulus. The tensile modulus and thermal stability of PBS were moderately improved after nanocomposite preparation with 3 wt% of MWCNTs, while electrical conductivity of neat PBS dramatically increased after nanocomposite formation. For example, the in plane conductivity increased from 5.8 x 10(-9) S/cm for neat PBS to 4.4 x 10(-3) for nanocomposite, an increase of 10(6) fold in value of the electrical conductivity.
本通讯描述了可生物降解的聚丁二酸丁二醇酯（PBS）/多壁碳纳米管（MWCNTs）纳米复合材料的制备、表征及性能。通过在间歇式混合器中熔融共混制备纳米复合材料，MWCNTs的负载量为3 wt%。通过扫描电子显微镜和透射电子显微镜观察来研究MWCNTs在PBS基体中的分散分布状态，结果表明堆叠的MWCNTs在PBS基体中分布均匀。通过动态机械热分析对热机械行为进行了研究。结果表明PBS的力学性能有显著提高，例如，在室温下，储能弯曲模量从纯PBS的0.64 GPa增加到纳米复合材料的1.2 GPa，弹性模量值增加了约88%。用3 wt%的MWCNTs制备纳米复合材料后，PBS的拉伸模量和热稳定性有适度提高，而纯PBS形成纳米复合材料后电导率显著增加。例如，面内电导率从纯PBS的5.8×10⁻⁹ S/cm增加到纳米复合材料的4.4×10⁻³ S/cm，电导率值增加了10⁶倍。
