Solute transport across polyelectrolyte complex membranes

✍ Scribed by Ryu, Seh Man ;Miller, Irving F.

• Publisher: John Wiley and Sons
• Year: 1971
• Tongue: English
• Weight: 714 KB
• Volume: 5
• Category: Article
• ISSN: 0021-9304
• DOI: 10.1002/jbm.820050402

✦ Synopsis

The transport of glucose and urea under electro-osmosis across two polyelectrolyte complex membranes and two other membranes, for comparison, was analyzed in detail, both experimentally and theoretically.

The membranes were characterized by measurements of water content, concentration of coion and counterion in the membrane, and dist,ribution coefficient of glucose and urea in the absence of electric current, as a function of external solution composition. I n addition, fluxes of those solutes and solvent were measured as a function of external solution composition and of electric current.

The observed phenomena were modelled by use of Fick's law of diffusion, with electro-osmosis treated simply as bulk flow. The effect of stirring was accounted for in terms of a boundary layer mass transfer coefficient.

The results indicate a good fit of the model to the data for glucose. For urea, the results indicate substantial binding of urea to the membrane matrix and anomalous behavior in the boundary layer adjacent to the membrane.