| Autor: |
Kiyono, Ryotaro, Tasaka, Masayasu, Nagura, Masanobu |
| Zdroj: |
Bulletin of the Chemical Society of Japan; December 1994, Vol. 67 Issue: 12 p3201-3204, 4p |
| Abstrakt: |
The dependence of the streaming potential across hydrogel membranes on time was measured. The gel membranes used were obtained by blending various amounts of poly(vinyl alcohol) and poly(sodium l-glutamate), which have different average molecular weights per cross-linked unit. The streaming potential increased rapidly just after applying a pressure difference and then increased gradually up to a steady-state value. The time dependence of the streaming potential was analyzed as the relaxation of the polymer chains dissolved in the liquid phase of the membrane. The relaxation for all the gel membranes consisted of a single component. The relaxation time was long if the gel had a large average molecular weight per cross-linked unit. The effects of cross-linking and the concentration of the external solution on the relaxation time are discussed. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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