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Citation: Zhao Kong-Shuang. Dielectric Analysis of the Concentration Polarization Phenomena at Membrane/Solution Interface[J]. Acta Physico-Chimica Sinica, ;1996, 12(07): 635-640. doi: 10.3866/PKU.WHXB19960711 shu

Dielectric Analysis of the Concentration Polarization Phenomena at Membrane/Solution Interface

Zhao Kong-Shuang

1.
State Key Laboratory for Physical Chemistry of Solid Surface,Department of Chemistry,Xiamen University,Xiamen 361005

Received Date: 28 November 1995
Available Online: 15 July 1996

A dielectric measurements were carried out over the frequency range 10~107 Hz for the systems comprising strong, weak charged membranes and solution. A distinct double dielectric relaxation was observed under application of d.c. bias voltage. The data on the double relaxation for cation-exchange membrane were analyzed by using a dielectric theory for concentration polarization layer(CPL), the structure parameters of the layer and phase parameters of the two adjoining aqueous phases were obtained from dielectric parameters observed. The cause of dielectric relaxation was discussed in detail. The results of simulation basis of dielectric theory of CPL made in previous study are shown to be reasonable, and a high possibility in respect to the origin of the dielectric relaxation was suggested by the experiments.
- Concentration polarization,
- Dielectric relaxation,
- Ion-exchenge membrane
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