FUNDAMENTAL STUDY OF ELECTROOSMOTIC FLOW THROUGH PERFORATED MEMBRANE
FUNDAMENTAL STUDY OF ELECTROOSMOTIC FLOW THROUGH PERFORATED MEMBRANE
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穿孔膜电渗流的基础研究
DOI：
10.1252/jcej.12.466
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发表时间：
1979
影响因子：
0.8
通讯作者：
H. Yukawa
中科院分区：
文献类型：
--
作者：
Kazumasa Kobayashi;M. Iwata;Yukio Hosoda;H. Yukawa
基于Navier-Stokes方程，考虑电场的影响，分析了由直管和圆管组成的穿孔膜上的电渗透流动。理论上研究了两种情况，即毛细管壁面附近液体中真电荷的体积密度恒定且与平均值相对应的情况，以及双电层中电荷沿毛细管径向分布的情况。实验用不同毛细管直径的膜在几种施加电压下进行。采用单膜和不同毛细管直径的多膜串联。电渗透压与电流密度成正比，随毛细管直径的增大而减小。电渗流速与电流密度成正比，随直径的增大而增大。这些结果与假设真实电荷的体积密度恒定的理论结果很好地吻合。
Electroosmotic flow through a perforated membrane consisting of straight and circular capillary tubes was analyzed on the basis of the Navier-Stokes equation, taking account of the effect of an electric field. Two cases were theoretically investigated, i. e., that where the volumetric density of true electric charge in the liquid near the wall of the capillary tubes is constant and corresponds to the average, and that where the electric charges in the electric double layer are distributed in the radial direction of the capillary. Experiments were performed under several applied voltages using membranes of various capillary diameters. A single membrane and several membranes with different capillary diameters arranged in series were used. The electroosmotic pressure was directly proportional to electric current density and decreased with increase of capillary diameter. The rate of electroosmotic flow was directly proportional to current density and increased with increase of diameter. These results were in good agreement with the theoretical results derived from the assumption that the volumetric density of true electric charge is constant.