Barragán VM
Departamento Física Aplicada I, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, Ciudad Universitaria, Madrid, 28040, Spain
J Colloid Interface Sci. 2000 Oct 15;230(2):359-366. doi: 10.1006/jcis.2000.7063.
Electroosmosis experiments through a cation-exchange membrane have been performed using NaCl solutions in different experimental situations. The influence of an alternating (ac) sinusoidal perturbation, of known angular frequency and small amplitude, superimposed to the usual applied continuous (dc) signal on the electroosmotic flow has been studied. The experimental results show that the presence of the ac perturbation affects the electroosmotic flow value, depending on the frequency of the ac signal and on the solution stirring conditions. In the frequency range studied, two regions have been observed where the electroosmotic flow reaches a maximum value: one at low frequencies ( approximately Hz); and another at frequencies of the order of kHz. These regions could be related to membrane relaxation phenomena. Copyright 2000 Academic Press.
通过阳离子交换膜进行了电渗实验，实验采用不同实验条件下的氯化钠溶液。研究了已知角频率和小振幅的交变（ac）正弦扰动叠加到通常施加的连续（dc）信号上对电渗流的影响。实验结果表明，交流扰动的存在会影响电渗流值，这取决于交流信号的频率和溶液搅拌条件。在所研究的频率范围内，观察到电渗流达到最大值的两个区域：一个在低频（约Hz）；另一个在kHz量级的频率处。这些区域可能与膜弛豫现象有关。版权所有2000年学术出版社。
