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Control and modelling of capillary flow of epoxy resin in aligned carbon nanotube forests

机译：对齐碳纳米管林中环氧树脂毛细血管流动的控制与建模

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摘要

This paper examines the mechanism of infiltration by capillary flow of epoxy resin into vertically-aligned carbon nanotube forests. The resin viscosity during curing was characterized by rheometry. Carbon nanotube forests were brought into contact with resin at a range of times during curing, therefore at a range of viscosities. The penetration of the resin into the forests was measured using electron microscopy, X-ray micro-computed tomography and energy-dispersive X-ray spectroscopy, the latter relying on a chromium-complex dye additive which acts as a marker for the presence of resin. Experimental results were compared to a simulation based on the Implicit Lucas-Washburn equation for capillary flow. It was found that prior to the resin gel point, the resin penetrates through the full height of the forest. Close to the gel point, the flow into the forest ceases, leaving unwetted regions of nanotubes. Understanding the relationship between resin flow in nanotube structures and the resin viscosity and curing has important application in the fabrication of nanocomposite materials. This "partial wetting" effect is a key requirement for a previously proposed method for the fabrication of carbon nanotube composites by additive manufacture (AM) which would provide strong interlayer reinforcement combined with the versatility of AM.
机译：本文研究了环氧树脂毛细管流入垂直排列的碳纳米管林中浸润机制。通过流变学，固化过程中的树脂粘度表征。在固化过程中，在固化期间的一系列时间内与树脂接触碳纳米管林，因此在一系列粘度下。使用电子显微镜，X射线微型计算机断层扫描和能量分散X射线光谱测量树脂进入森林的渗透，后者依赖于铬 - 复杂的染料添加剂，其用作树脂存在的标记物。将实验结果与基于毛细血管流动的隐含Lucas-Washburn方程的模拟进行了比较。结果发现，在树脂凝胶点之前，树脂穿过森林的全高度渗透。靠近凝胶点，流入森林停止，留下未展示的纳米管区域。理解纳米管结构中树脂流动的关系，树脂粘度和固化在纳米复合材料的制造中具有重要应用。这种“部分润湿”效果是通过添加剂制造（AM）制备碳纳米管复合材料的先前所提出的方法的关键要求，这将提供强大的层间增强与AM的多功能性。

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  • 来源
    《RSC Advances》 |2015年第49期|共9页
  • 作者

    Beard J. D.; Rouholamin D.; Farmer B. L.; Evans K. E.; Ghita O. R.;

  • 作者单位

    Univ Exeter Coll Engn Math &

    Phys Sci Exeter Adv Technol Exeter EX4 4QF Devon England;

    Univ Exeter Coll Engn Math &

    Phys Sci Exeter Adv Technol Exeter EX4 4QF Devon England;

    Airbus Corp Ltd Airbus Grp Filton BS54 7QW England;

    Univ Exeter Coll Engn Math &

    Phys Sci Exeter Adv Technol Exeter EX4 4QF Devon England;

    Univ Exeter Coll Engn Math &

    Phys Sci Exeter Adv Technol Exeter EX4 4QF Devon England;

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  • 正文语种 eng
  • 中图分类 化学;
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