Determination of the surface potential for hollow-fiber membranes by the streaming-potential method
| Autor: | V. D. Sobolev, I. P. Sergeeva, Anatoly Filippov, T. A. Vorob’eva |
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| Rok vydání: | 2017 |
| Předmět: |
Chemistry
Analytical chemistry Polyacrylonitrile 02 engineering and technology Surfaces and Interfaces 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Streaming current Quantitative Biology::Cell Behavior 0104 chemical sciences Quantitative Biology::Subcellular Processes chemistry.chemical_compound Colloid and Surface Chemistry Membrane Electrical resistivity and conductivity Fiber Surface charge Nanofiltration Physical and Theoretical Chemistry Composite material 0210 nano-technology Porosity |
| Zdroj: | Colloid Journal. 79:677-684 |
| ISSN: | 1608-3067 1061-933X |
| DOI: | 10.1134/s1061933x17050155 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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