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Single particle contact versus particle packing behavior: model based analysis of chemically modified glass particles

机译：单颗粒接触与颗粒堆积行为：化学改性玻璃颗粒的基于模型的分析

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摘要

Smooth spherical micro glass particles are the reference particle system to demonstrate the correlation between single contacts and the particle packing properties. To investigate the influence of the van der Waals attraction force, the particles will be functionalized to obtain hydrophilic and hydrophobic surfaces. To remove the impurities and hydrophilize the particle surfaces a very strong oxidizing agent is used-the peroxymonosulfuric acid. In order to generate a hydrophobic glass surface, the process of silanization is applied. The comprehensive force displacement model of elastic-plastic and adhesive contacts are discussed. Therefore the model 'stiff particles with soft contacts' is used to quantify and compare the elastic-plastic contact properties. In this work, the particle contacts are experimentally investigated by means of atomic force microscopy (AFM), nanoindentation and shear tests. While the AFM and nanoindenter measurements are aimed to analyse single particle contacts, shear tests are used for particle packing studies. The fundamental challenge and question is addressed and answered: How do the micro mechanical material properties change when the glass surfaces are functionalized? Do we obtain the same behavior for the used micro glass particles when we compare the different methods?
机译：光滑的球形微玻璃粒子是参考粒子系统，用于证明单接触与粒子堆积特性之间的相关性。为了研究范德华力的影响，将颗粒官能化以获得亲水和疏水表面。为了去除杂质并使颗粒表面亲水化，使用了非常强的氧化剂-过氧一硫酸。为了产生疏水性玻璃表面，应用了硅烷化过程。讨论了弹塑性和黏性接触的综合力位移模型。因此，模型“具有软接触的硬质颗粒”用于量化和比较弹塑性接触特性。在这项工作中，通过原子力显微镜（AFM），纳米压痕和剪切试验对颗粒接触进行了实验研究。尽管原子力显微镜和纳米压痕仪的测量旨在分析单个颗粒的接触，但剪切测试用于颗粒堆积研究。解决并回答了基本的挑战和问题：玻璃表面功能化后，微机械材料的性能如何变化？当我们比较不同的方法时，对于使用过的微玻璃颗粒，我们是否获得相同的行为？

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  • 来源
    《Granular matter》 |2014年第3期|359-375|共17页
  • 作者

    Katja Mader-Arndt; Zinaida Kutelova; Regina Fuchs; Jan Meyer; Thorsten Staedler; Werner Hintz; Juergen Tomas;

  • 作者单位

    Institute for Process Engineering, Mechanical Process Engineering, Otto von Guericke University Magdeburg, Universitaetsplatz 2, 39106 Magdeburg, Germany;

    Institute for Process Engineering, Mechanical Process Engineering, Otto von Guericke University Magdeburg, Universitaetsplatz 2, 39106 Magdeburg, Germany;

    Institute of Materials Engineering, Surface and Materials Technology, University of Siegen, Paul-Bonatz-Strasse 9-11, 57076 Siegen, Germany;

    Institute of Materials Engineering, Surface and Materials Technology, University of Siegen, Paul-Bonatz-Strasse 9-11, 57076 Siegen, Germany;

    Institute of Materials Engineering, Surface and Materials Technology, University of Siegen, Paul-Bonatz-Strasse 9-11, 57076 Siegen, Germany;

    Institute for Process Engineering, Mechanical Process Engineering, Otto von Guericke University Magdeburg, Universitaetsplatz 2, 39106 Magdeburg, Germany;

    Institute for Process Engineering, Mechanical Process Engineering, Otto von Guericke University Magdeburg, Universitaetsplatz 2, 39106 Magdeburg, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Van der Waals attraction force; Surface functionalization; Particle contact; Powder bulk behavior;

    机译：范德华力;表面功能化;颗粒接触;粉末散装行为;

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