The effect of interaction between particles on flow characteristic of the clay colloidal dispersion system

在本研究中，定量地阐明了定常流动下的流体动力相互作用和粘弹性性质取决于扩散双层的厚度和弥散区颗粒间力的强度，其中斥力优于颗粒间的相互作用力。结果表明，钠基蒙脱石在分散条件下的流体动力相互作用仅依赖于扩散双层，粘土颗粒之间的相互作用也随着扩散双层厚度的增加而增强。通过麦克斯韦模型对悬浮液在不同浓度下的流动曲线进行分析，得到了牛顿粘度、弹性模量和应力松弛时间等参数。结果表明，这些流变常数随S…的降低而增大。更多的谷丙转氨酶浓度。这一事实表明，颗粒之间的排斥力影响着悬浮液的流动特性，即使在颗粒没有发生结构变化的情况下也是如此。通过考察颗粒在悬浮状态下的取向，蒙脱土颗粒在0.011的体积分数处平行排列。通过考察各盐浓度下的排斥力与粘度系数、弹性模数和松弛时间的关系，结果表明，随着排斥力的增大，蒙脱土悬浮液的性质发生了明显的变化。此外，蒙脱土分散体系的排斥力与粘弹性之间呈线性关系，因为这些流变常数与颗粒间的排斥力成正比增加。较少

In this study, it was quantitatively clarified that hydrodynamic interaction and viscoelastic property under steady flow depended on thickness of the diffusion double layer and intensity of the interparticle force in the dispersion region where repulsive force excels as interaction force between particles. The summary of the results is shown below.The hydrodynamic interaction of sodium montmorillonite under dispersed condition depends only on the diffuse double layer, and interaction between clay particles becomes also stronger as the thickness of the diffuse double layer increases. This fact shows that hydrodynamic interaction is caused by the second electroviscous effect.By analyzing the flow curve of suspension for each salt concentration using the Maxwell model, the following were quantitatively obtained : Not only newton viscosity but also elastic modulus and relaxation time of stress. As the results, it was proven that these rheology constants increased with the lowering of the s … More alt concentration. This fact indicates that repulsive force between particles influences the flow characteristic of the suspension, even when structural change of the particle is not produced.As a result of examining orientation of the particle in the suspension state, the montmorillonite particle is arranged in parallel at 0.011 volume fraction. Therefore, it is appropriate to use the approximate formula of parallel plates due to DLVO theory in the calculation of the repulsive force.As a result of examining the relationship between repulsive force for each salt concentration and coefficient of viscosity, elastic modulus and relaxation time, it was shown that the montmorillonite suspension was made to change to more solid property by the increase in the repulsive force. In addition, the relation between repulsive force and viscoelastic property of montmorillonite dispersed system is linear, because these rheology constants increase in proportion to the repulsive force between particles. Less