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首页> 外文期刊>Journal of Materials Research >Effect of graphitic filler size and shape on the microstructure, electrical percolation behavior and thermal properties of nanostructured multilayered carbon films deposited onto paper substrates
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Effect of graphitic filler size and shape on the microstructure, electrical percolation behavior and thermal properties of nanostructured multilayered carbon films deposited onto paper substrates

机译：石墨填料的尺寸和形状对沉积在纸基材上的纳米结构多层碳膜的微结构，电渗行为和热性能的影响

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摘要

Dispersions containing 1 mg/mL of several carbon nanomaterials were used to deposit films containing 1 to 20 layers. The electrical properties of the composite films were characterized via impedance spectroscopy along two directions: in-plane on the film topmost surface and also through the thickness. It was found that carbon black nanoparticles never achieved full in-plane interconnection while the multiwalled carbon nanotube (MWNT) and single-walled carbon nanotube were already percolated at one layer. Graphite flakes showed a complete percolation curve that allowed its resistance to change by 6-7 orders of magnitude. The differences in the microstructure, electrical response, and thermal decomposition behavior of these carbon nanomaterial-paper substrate films were explained by detailed equivalent circuit analysis of the impedance spectra. Interpretation was supplemented by scanning electron microscopy images and thermal analysis via Differential Scanning Calorimetry/Thermogravimetric Analysis (DSC/TGA). Thru-plane electrical properties were for the most part similar, although only films with short MWNT showed a clearly infiltrated network structure.
机译：包含1 mg / mL的几种碳纳米材料的分散体用于沉积包含1至20层的薄膜。通过沿两个方向的阻抗谱来表征复合膜的电性能：在膜的最表面上的面内以及在整个厚度上。发现炭黑纳米粒子从未实现完全的面内互连，而多壁碳纳米管（MWNT）和单壁碳纳米管已经渗透了一层。石墨薄片显示出完整的渗透曲线，使其抗性变化了6-7个数量级。通过对阻抗谱进行详细的等效电路分析，解释了这些碳纳米材料-纸基材薄膜的微观结构，电响应和热分解行为的差异。通过扫描电子显微镜图像和通过差示扫描量热法/热重分析（DSC / TGA）进行的热分析来补充解释。尽管只有短MWNT的薄膜显示出明显渗透的网络结构，但通面电性能在很大程度上相似。

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  • 来源
    《Journal of Materials Research》 |2014年第3期|472-484|共13页
  • 作者

    Rachel L. Muhlbauer; Timothy L. Pruyn; Waylon T. Puckett; Rosario A. Gerhardt;

  • 作者单位

    School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245;

    School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245;

    School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245;

    School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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