A theory on the electroviscous effect: A method for the estimation of the viscosity of dispersions of charged spherical colloidal particles
A theory on the electroviscous effect: A method for the estimation of the viscosity of dispersions of charged spherical colloidal particles
复制标题
电粘性效应理论：带电球形胶体颗粒分散体粘度的估计方法
DOI：
10.1063/1.445873
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发表时间：
1983
影响因子：
4.4
通讯作者：
C. Rha
中科院分区：
文献类型：
--
作者：
J. Menjivar;C. Rha
本文提出了一种估算静电相互作用对带电球形颗粒浓分散体系剪切粘度影响的方法。二次电粘性效应可以与有效最大堆积分数（φM）相关，其被定义为带电粒子达到完全长程有序的粒子浓度。最大填充分数（φM）可以通过理论或实验确定。该排除体积方法定量描述了表面电位（λ 0）、颗粒半径（α）、悬浮介质离子强度（I）和颗粒浓度（φ）对带电球形颗粒的胶体单分散体的低剪切粘度的作用。所提出的理论的有效性建议与现有的文献数据的协议。
A method to estimate the effect of electrostatic interactions on the shear viscosity of concentrated dispersions of charged spherical particles is presented. The secondary electroviscous effect can be related to an effective maximum packing fraction (φM), defined as the particle concentration at which the charged particles attain complete long‐range order. The maximum packing fraction (φM) can be determined either theoretically or experimentally. This excluded volume approach quantitatively describes the roles of surface potential (ψ0), particle radius (a), suspending medium ionic strength (I), and particle concentration (φ) on the low‐shear viscosity of collodial monodispersions of charged spherical particles. The validity of the proposed theory is suggested by an agreement with existent literature data.