Membrane fouling in the ultrafiltration of polyelectrolyte solutions: Polyacrylic acid and bovine serum albumin |
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| Affiliation: | 1. Department of Pharmacology, Osaka City University Medical School, Osaka, Japan;2. Applied Pharmacology and Therapeutics, Osaka City University Medical School, Osaka, Japan;3. Department of Advanced Medical Initiatives, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan;4. Department of Molecular and Cellular Biology, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan;5. Department of Pathology, Osaka City University Medical School, Osaka, Japan |
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| Abstract: | Batch ultrafiltration was used to study the reduction in membrane permeability due to fouling by polyelectrolyte solutes. The flexibility of the polymer chain was found to be an important factor in determining the degree of fouling in the ultrafiltration of poly(acrylic acid) (PAA) solutions, as the effects observed were dependent on the pH and the cation concentration. These parameters were found to have a less pronounced effect in the ultrafiltration of bovine serum albumin (BSA) solutions. An observation of the effects of temperature and applied pressure led to the conclusion that membrane fouling by PAA was due to a pore-plugging effect while that caused by BSA was attributed to hydrophobic adsorption. |
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