Investigation on the Adhesion Mechanisms of Magnetic Composite Particles with the Centrifuge Method

离心法研究磁性复合颗粒的粘附机理

• 批准号: 169268412
• 负责人: Professor Dr.-Ing. Hermann Nirschl
• 金额: --
• 依托单位: Arbeitsgruppe Verfahrenstechnische Maschinen (VM)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/169268412?language=en
• 关键词: Investigation; Adhesion; Mechanisms; Magnetic; Composite

A method for the measurement of adhesion forces between magnetic composite particles and flat materials was developed at the Institute of Mechanical Engineering and Mechanics during the last funding periods. The adhesion forces of different particle and material combinations were measured. In the third project phase the measurements are extended in order to measure the adhesion forces between particles. The measurements are carried out by observing particle chains within a magnetic field. Therefore a new developed centrifuge is used, that allows the direct observation of the particle chains during centrifugation. The adhesion forces can be calculated according to the centrifugal force at the location of the chain fracture. On the other hand the stability of a sediment within a centrifugal field is investigated. Besides the adhesion forces in normal direction the adhesion forces in tangential direction are measured. With the known contact radius the adhesion moment can be calculated.The aim is to clarify the contribution of the single adhesion component on the stability of a sediment.

在上一次资助期间，机械工程和机械研究所开发了一种测量磁性复合颗粒与平板材料之间粘附力的方法。测量了不同颗粒和材料组合的粘附力。在第三个项目阶段，为了测量颗粒间的粘附力，对测量进行了扩展。测量是通过观察磁场中的粒子链来进行的。因此，使用了一种新开发的离心机，它可以在离心过程中直接观察粒子链。粘附力可以根据断链位置的离心力计算出来。另一方面，对离心场中泥沙的稳定性进行了研究。除了法向的粘附力外，还测量了切向的粘附力。在已知接触半径的情况下，可以计算粘附力矩，目的是阐明单个粘附组分对泥沙稳定性的贡献。

项目成果

Influence of the magnetic force on the van der Waals force of superparamagnetic composite particles

• DOI: 10.1016/j.powtec.2014.03.050
• 发表时间: 2014-06
• 期刊: Powder Technology
• 影响因子: 5.2
• 作者: J. Knoll;H. Nirschl

Investigations on the magnetization behavior of magnetic composite particles

磁性复合颗粒磁化行为的研究

• DOI: 10.1016/j.jmmm.2014.05.001
• 发表时间: 2014
• 期刊: Journal of Magnetism and Magnetic Materials
• 影响因子: 2.7
• 作者: C. Eichholz;J. Knoll;D. Lerche;H. Nirschl
• 通讯作者: H. Nirschl

Adhesive Behavior of Magnetizable Particles in Magnetic Fields – Simulation and Verification

可磁化粒子在磁场中的粘附行为——模拟与验证

• DOI: 10.1002/ceat.201300553
• 发表时间: 2014
• 期刊: Chemical Engineering & Technology
• 影响因子: 2.1
• 作者: J. Knoll;H. Nirschl;A. Haarmann;E. Schmidt
• 通讯作者: E. Schmidt

Characterization of the adhesion force between magnetic microscale particles and the influence of surface-bound protein

磁性微米颗粒之间的粘附力表征以及表面结合蛋白的影响

• DOI: 10.1016/j.powtec.2015.05.028
• 发表时间: 2015
• 期刊: Powder Technology
• 影响因子: 5.2
• 作者: J. Knoll;S. Knott;H. Nirschl
• 通讯作者: H. Nirschl

Integration of a microscope into a centrifuge for adhesion force measurement of particles

将显微镜集成到离心机中以测量颗粒的粘附力

• DOI: 10.1016/j.powtec.2016.09.065
• 发表时间: 2017
• 期刊: Powder Technology
• 影响因子: 5.2
• 作者: J. Knoll;S. Knott;H. Nirschl
• 通讯作者: H. Nirschl