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

在这项研究中，它被定量地澄清，流体动力学相互作用和稳定流动下的粘弹性取决于扩散双层的厚度和在排斥力优于颗粒之间的相互作用力的分散区域中的颗粒间力的强度。结果表明：钠基蒙脱石在分散状态下的流体动力学相互作用仅取决于扩散双电层，且随着扩散双电层厚度的增加，粘土颗粒间的相互作用也增强。利用麦克斯韦模型对不同盐浓度下悬浮液的流动曲线进行分析，定量地得到了悬浮液的牛顿粘度、弹性模量和应力松弛时间。结果表明，流变常数随温度的降低而增大 ...更多信息 alt浓度这一事实表明，即使当颗粒的结构没有发生变化时，颗粒之间的排斥力也影响悬浮液的流动特性，作为检查悬浮状态下颗粒取向的结果，蒙脱石颗粒以0.011体积分数平行排列。因此，在推斥力的计算中，采用DLVO理论的平行板近似公式是合适的。通过考察各盐浓度的推斥力与粘度系数、弹性模量和松弛时间的关系，结果表明，推斥力的增加使蒙脱土悬浮液向更固体化的方向转变。此外，由于蒙脱土分散体系的流变学常数与颗粒间的排斥力成正比，因此排斥力与体系的粘弹性能呈线性关系。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