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6篇 您的检索式:作者名="Siegfried Ripperger"
    题名 作者 年代 出处 被引量
1MEASUREMENT OF ADHESION FORCES IN AIR WITH THE VIBRATION METHOD显示文摘The vibration method represents a practical method for the measurement of adhesion forces and adhesion force distributions. This method causes sinusoidally alternating stresses and yields detachment and contact forces between particles and substrate of the same order of magnitude. Alternating contact forces of the vibration method can cause an adhesion force intensification through flattening of asperities. The measuring principle of the vibration method and the analysis of experimental results are described in the article. Normal adhesion forces (pull-off forces) are measured using the vibration method and the colloidal probe technique. The results of both methods show good agreement for small particle sizes. The influence of the detachment force direction is shown by comparing tangential and normal adhesion forces measured using particle reentrainment in a turbulent air flow and the vibration method, respectively. The surface roughness of the substrate and the relative humidity are shown to significantly influence the measured adhesion forces. For the calculation of the adhesion forces, an approach by Rabinovich was combined with approximations of plastic micro asperity flattening. The Rabinovich approach accounts for roughness effects on the van der Waals force by incorporating the rms roughness of the interacting surfaces, rms-values of the particles and substrates were measured with atomic force microscopy at different scanning areas.Siegfried Ripperger Konrad Hein 2005China Particuology2005,3,1:7
2Crossflow microfiltration - state of the art,显示文摘Siegfried Ripperger Justus Altmann 2002Separation Purification Technology2002,26,:2
3Particle deposition and layer formation at the crossflow microfiltration显示文摘Justus Altmann Siegfried Ripperger 1997Journal of Membrane Science1997,,124:1
4Influence of temper- ature on the flow properties of bulk solids 显示文摘Marcus Ripp Siegfried Ripperger 2010Chemi- cal Engineering Science2010,65,:1
5Dependence of ultrasonic attenuation on the material properties 显示文摘Frank Babick Frank Hinze Siegfried Ripperger 2000Colloids and Surfaces2000,172,:1
6横流微滤技术现状与应用显示文摘<正> 横流微滤(CMF)已经成为一种获取纯滤液的过滤技术,它所采取的过滤介质为微孔滤膜,可以截留粒度约0.05μm的颗粒。因此,CMF的使用介于超滤(颗粒粒度约0.5×10~3μm)Siegfried Ripperger 张剑鸣 1991化工装备技术1991,,4:0
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