Determination of the surface potential for hollow-fiber membranes by the streaming-potential method

A procedure has been proposed for measuring the surface potential of hollow-fiber membranes by the streaming-potential method under the conditions of a tangential flow of a solution. The zeta-potential and surface charge of nanofiltration hollow-fiber polyacrylonitrile membranes have been measured....

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Bibliographic Details
Published in:Colloid journal of the Russian Academy of Sciences 2017-09, Vol.79 (5), p.677-684
Main Authors: Sobolev, V. D., Filippov, A. N., Vorob’eva, T. A., Sergeeva, I. P.
Format: Article
Language:English
Subjects:
Charge transfer
Chemistry
Chemistry and Materials Science
Electrical resistivity
Hollow fiber membranes
Nanofiltration
Polymer Sciences
Porosity
Streaming potential
Surface charge
Surfaces and Interfaces
Thin Films
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Summary:A procedure has been proposed for measuring the surface potential of hollow-fiber membranes by the streaming-potential method under the conditions of a tangential flow of a solution. The zeta-potential and surface charge of nanofiltration hollow-fiber polyacrylonitrile membranes have been measured. The measurements have been performed for membranes with different porosities, which were obtained by partial drying of initial humid membranes. The porosity has been determined from the electrical conductivity of a membrane. An equation has been proposed for calculating the charge transfer by a solution flow in a porous layer. It has been shown that the use of the proposed equation makes it possible to obtain more correct values of the membrane surface potential.
ISSN:1061-933X
1608-3067
DOI:10.1134/S1061933X17050155