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首页> 外文期刊>Materials Science and Engineering >Polymeric thin shells: Measurement of elastic properties at the nanometer scale using atomic force microscopy
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Polymeric thin shells: Measurement of elastic properties at the nanometer scale using atomic force microscopy

机译：聚合物薄壳：使用原子力显微镜在纳米级测量弹性

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摘要

We conducted atomic force microscopy nanocompression tests on thin-walled hollow microspheres in aqueous conditions. The microspheres used for this study consist of a ～10nm soft gel skin and an inner ～40 nm stiff polymeric shell. The resulting force-deformation curves revealed an initial small-range nonlinear repulsion associated with the soft ultrathin outer layer followed by a linear regime which was used to calculate the Young's modulus of the stiff thin wall. The linear regime is of the order of the shell thickness and the elastic modulus deduced using the linear Reissner relationship is comparable to the corresponding bulk polymer modulus. At larger deformations, we observed near-linear behaviour zones of similar slope separated by various non-linearities, steps and jumps which are associated with buckling events.
机译：我们在水性条件下对薄壁空心微球进行了原子力显微镜纳米压缩测试。用于本研究的微球由〜10nm的软凝胶皮和〜40nm的内部刚性聚合物壳组成。所得的力-变形曲线显示出与软超薄外层相关的初始小范围非线性斥力，然后是线性区域，该线性区域用于计算刚性薄壁的杨氏模量。线性状态为壳厚度的量级，并且使用线性Reissner关系推导的弹性模量与相应的本体聚合物模量相当。在较大的变形下，我们观察到相似斜率的近线性行为区域，这些行为区域被各种非线性，台阶和跳跃所分隔，这些非线性与屈曲事件有关。

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  • 来源
    《Materials Science and Engineering》 |2009年第3期|231-234|共4页
  • 作者

    Emmanouil Glynos; Vassilis Sboros; Vasileios Koutsos;

  • 作者单位

    Institute for Materials and Processes. School of Engineering & Centre for Materials Science and Engineering. The University of Edinburgh, King's Buildings. Edinburgh EH9 3JL, United Kingdom Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA;

    Medical Physics. The University of Edinburgh, Chancellor's Building. 49 Little France Crescent, Edinburgh EH16 4SB, United Kingdom;

    Institute for Materials and Processes. School of Engineering & Centre for Materials Science and Engineering. The University of Edinburgh, King's Buildings. Edinburgh EH9 3JL, United Kingdom;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    thin films; polymers; microcapsules; microbubbles; nanomechanics; atomic force microscopy;

    机译：薄膜;聚合物微胶囊;微泡纳米力学原子力显微镜;

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