Fouling behaviour of polyethersulfone UF membranes made with different PVP
- Marchese, Jose
- Ponce, Mariela Leticia
- Ochoa, Nelio Ariel
- Prádanos, Pedro
- Palacio, Laura
- Hernández, Antonio
DOIAbstract
Several polyethersulfone (PES) ultrafiltration membranes have been made with small quantities of polyvinyl-pyrrolidone (PVP) of different molecular weights to increase the permeability without a significant reduction in selectivity. The corresponding fouling mechanism and subsequent structural modifications have been analyzed when in contact with bovine serum albumin (BSA) and DL-histidine (DLH). It has been shown that according to the relative sizes of solute and pores of the membranes: BSA fouls the three membranes externally whereas DLH fouls them internally. Moreover, BSA fouls the non-PVP membranes faster than DLH fouls them slower, according to the action of hydrophobic and electrostatic forces acting at the working pH (4.9). The chan...
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