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首页> 外文期刊>Journal of Materials Science >Role of structure and morphology in the elastic modulus of carbon nanotube composites
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Role of structure and morphology in the elastic modulus of carbon nanotube composites

机译：结构和形态在碳纳米管复合材料弹性模量中的作用

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摘要

The nature of nanoscale reinforcements in the carbon nanotube composites indicates nanocomposite properties are heavily dependent on the microano-structure and morphology. Macroscopic parameter-based properties estimation may lead to deviation as large as 30%. In this paper, a modified shear-lag model, combined with probability statistical theory and composites morphology, is established to investigate the elastic properties of single wall carbon nanotubes (SWNTs)-reinforced polymer composites. The computational results indicated that elastic modulus of nanocomposite was remarkably dependent on the microano-structure, including diameter, length, and orientation of the dispersed SWNTs. Microstructure-dependent shape factor and orientation effect factor played a key role on achieving high-performance nanocomposites. Elastic modulus of nanocomposite with well-dispersed carbon nanotubes was more susceptible to the orientation. Similarly, nanocomposite modulus was more subject to the dispersion influence when SWNTs were well-aligned. The maximal modulus was located in the zone of small rope diameters and small orientation angles when adequate interfacial bonding was provided. The computational results were also compared with experimental outcome and demonstrated good consistence.
机译：碳纳米管复合材料中纳米级增强材料的性质表明，纳米复合材料的性能在很大程度上取决于微观/纳米结构和形态。基于宏观参数的属性估计可能会导致30％的偏差。本文建立了改进的剪切滞后模型，结合概率统计理论和复合材料形态，研究了单壁碳纳米管（SWNTs）增强聚合物复合材料的弹性。计算结果表明，纳米复合材料的弹性模量显着取决于微观/纳米结构，包括分散的单壁碳纳米管的直径，长度和取向。依赖于微结构的形状因子和取向效应因子在获得高性能纳米复合材料方面起着关键作用。具有良好分散的碳纳米管的纳米复合材料的弹性模量更容易受到取向的影响。同样，当SWNT排列正确时，纳米复合材料模量更易受到分散的影响。当提供足够的界面粘结时，最大模量位于较小的绳索直径和较小的定向角的区域。计算结果也与实验结果进行了比较，并显示出良好的一致性。

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