Single particle contact versus particle packing behavior: model based analysis of chemically modified glass particles
Single particle contact versus particle packing behavior: model based analysis of chemically modified glass particles
复制标题
DOI：
10.1007/s10035-013-0478-9
复制
发表时间：
2014-01
期刊：
影响因子：
2.4
通讯作者：
Katja Mader-Arndt;Zinaida Kutelova;R. Fuchs;Jan Meyer;T. Staedler;W. Hintz;J. Tomas
中科院分区：
文献类型：
--
作者：
Katja Mader-Arndt;Zinaida Kutelova;R. Fuchs;Jan Meyer;T. Staedler;W. Hintz;J. Tomas
光滑球形微玻璃颗粒是证明单接触与颗粒堆积特性之间相关性的参考颗粒系统。为了研究范德华吸引力的影响，将对颗粒进行功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——过一硫酸。为了产生疏水性玻璃表面，采用了硅烷化工艺。讨论了弹塑性接触和粘着接触的综合力位移模型。因此，“硬颗粒与软接触”模型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)、纳米压痕和剪切测试对颗粒接触进行了实验研究。 AFM 和纳米压痕仪测量的目的是分析单颗粒接触，而剪切测试则用于颗粒堆积研究。解决并回答了基本的挑战和问题：当玻璃表面功能化时，微机械材料性能如何变化？当我们比较不同的方法时，我们是否获得了所用微玻璃颗粒的相同行为？
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?