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Investigation of the relationship between adhesion force and mechanical behavior of vertically aligned carbon nanotube arrays

机译：垂直对准碳纳米管阵列粘附力与力学行为的关系研究

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摘要

The mechanical behavior of vertically aligned carbon nanotube (VACNT) arrays can largely impact their adhesion performance. In this paper, we fabricated various VACNT arrays to investigate the relationship between adhesion force and their mechanical behavior. High-volume fraction (3.4%) CNT arrays did not exhibit the applicable adhesion effect due to their intrinsic elastic property. Adhesion measurements on several low-density (less than 0.5%) VACNT arrays demonstrated that the adhesion performance is strongly related to the plastic deformation of the carbon nanotubes at the contact surface. Due to the nature of the growth of CNT arrays, the top region of the as-grown CNT arrays is denser and stiffer than the bottom region of the arrays. Therefore, compared with as-grown CNT arrays, the flipped CNT arrays reached higher adhesion efficiency (the ratio of adhesion force to preload) with lower preload due to the higher compliance at the top surface of the arrays. With cyclic loading under micro mechanical tests, stiffening of the surface and declining of adhesion force were also observed. These results illustrated that the mechanical compliance at the region near the contact interface is the dominant factor for the adhesion performance of VACNT arrays.
机译：垂直对准的碳纳米管（VACT）阵列的力学行为可以很大程度上影响它们的粘合性能。在本文中，我们制造了各种VACNT阵列，以研究粘附力与其机械行为之间的关系。高容量级分（3.4％）CNT阵列由于其固有的弹性性能而没有表现出适用的粘合效果。粘附测量几种低密度（小于0.5％）VACNT阵列表明，粘合性能与接触表面处的碳纳米管的塑性变形强烈相关。由于CNT阵列的生长的性质，生长的CNT阵列的顶部区域比阵列的底部区域更密集并且更硬。因此，与以生长的CNT阵列相比，由于阵列的顶表面的柔性较高，翻转的CNT阵列具有更高的预载效率（粘合力与预载的比率），其具有较低的预热。通过微机械测试下的循环载荷，还观察到表面的硬化和粘合力的下降。这些结果表明，接触界面附近的区域的机械顺应性是VACNT阵列附着性能的主导因素。

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  • 来源
    《Nanotechnology》 |2020年第29期|共9页
  • 作者

    Yang Xiaochen; Chen Lie; Zhang Peng; Zhong Hongmei; Zhang Yiyuan; Zhang Ruogu; Gu Ping; Zhao Yang;

  • 作者单位

    Univ Sci &

    Technol China CAS Key Lab Mech Behav &

    Design Mat Hefei 230022 Anhui Peoples R China;

    Univ Sci &

    Technol China CAS Key Lab Mech Behav &

    Design Mat Hefei 230022 Anhui Peoples R China;

    Univ Sci &

    Technol China CAS Key Lab Mech Behav &

    Design Mat Hefei 230022 Anhui Peoples R China;

    Univ Sci &

    Technol China CAS Key Lab Mech Behav &

    Design Mat Hefei 230022 Anhui Peoples R China;

    Univ Sci &

    Technol China CAS Key Lab Mech Behav &

    Design Mat Hefei 230022 Anhui Peoples R China;

    Univ Sci &

    Technol China CAS Key Lab Mech Behav &

    Design Mat Hefei 230022 Anhui Peoples R China;

    Univ Sci &

    Technol China CAS Key Lab Mech Behav &

    Design Mat Hefei 230022 Anhui Peoples R China;

    Univ Sci &

    Technol China CAS Key Lab Mech Behav &

    Design Mat Hefei 230022 Anhui Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    vertically aligned carbon nanotube arrays; mechanical behavior; adhesion force;

    机译：垂直对齐的碳纳米管阵列;机械行为;粘附力;

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