Abstract Multi-walled carbon nanotube (MWCNT) and montmorillonite (Mt) are used as reinforcing fillers in polymers. Achieving homogeneous distribution of the reinforcing nanoparticles without agglomerates in polymeric matrices continues to be an important topic in materials science. In this study, hybrid Mt/MWCNT nanofiller was prepared after determining the most stable composition with the help of dynamic light scattering (DLS). The hybrid Mt/MWCNT was characterized via X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) spectroscopy. The Mt/MWCNT hybrid fillers were incorporated in poly(lactic acid) (PLA) at concentrations of 0.5, 1 and 2 wt%, by a two-step procedure of solution and melt mixing, and their physicochemical, thermal, mechanical and morphological properties were evaluated. The physicochemical studies suggested strong hybrid-polymer interaction. The structural analyzes confirmed synergy between nanoclay and carbon nanotubes in achieving homogeneous dispersion of Mt/MWCNT nanoparticles in the PLA matrix. The thermal characterizations depicted that the Mt./MWCNT hybrid nanofillers synergistically restricted the PLA segment motions and promoted the crystallization of the polymer matrix. The mechanical properties of PLA/Mt/MWCNT nanocomposites were improved, confirming the reinforcing effect of the Mt/MWCNT hybrid on PLA matrix.

中文翻译：

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蒙脱石/碳纳米管杂化纳米填料对聚乳酸性能的影响

摘要 多壁碳纳米管（MWCNT）和蒙脱石（Mt）被用作聚合物中的增强填料。在聚合物基质中实现增强纳米颗粒的均匀分布而没有团聚体仍然是材料科学中的一个重要课题。在这项研究中，在动态光散射 (DLS) 的帮助下确定最稳定的成分后，制备了混合 Mt/MWCNT 纳米填料。通过 X 射线衍射 (XRD) 和傅里叶变换红外 (FTIR) 光谱对混合 Mt/MWCNT 进行表征。Mt/MWCNT 杂化填料以 0.5、1 和 2 wt% 的浓度掺入聚乳酸 (PLA) 中，通过溶液和熔融混合的两步程序，及其物理化学、热、机械和形态特性被评估。物理化学研究表明强杂化聚合物相互作用。结构分析证实了纳米粘土和碳纳米管在实现 Mt/MWCNT 纳米颗粒在 PLA 基质中的均匀分散方面的协同作用。热表征表明 Mt./MWCNT 混合纳米填料协同限制了 PLA 链段运动并促进了聚合物基质的结晶。PLA/Mt/MWCNT 纳米复合材料的机械性能得到改善，证实了 Mt/MWCNT 杂化物对 PLA 基体的增强作用。/MWCNT 杂化纳米填料协同限制 PLA 链段运动并促进聚合物基质的结晶。PLA/Mt/MWCNT 纳米复合材料的机械性能得到改善，证实了 Mt/MWCNT 杂化物对 PLA 基体的增强作用。/MWCNT 杂化纳米填料协同限制 PLA 链段运动并促进聚合物基质的结晶。PLA/Mt/MWCNT 纳米复合材料的机械性能得到改善，证实了 Mt/MWCNT 杂化物对 PLA 基体的增强作用。