Susanto, Heru and A., Roihatin and N., Aryanti and D.D., Anggoro and m., Ulbricht (2012) Effect of membrane hydrophilization on ultrafiltration performance for biomolecules separation. Material Science and Engineering C, 32 . pp. 1759-1766. ISSN 0928-4931
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This paper compares the performance of different hydrophilization methods to prepare low fouling ultrafiltration (UF) membranes. The methods include post-modification with hydrophilic polymer and blending of hydrophilic agent during either conventional or reactive phase separation (PS). The post-modiï¬ca ti on wa s done by photograft copolymerization of water-soluble monomer, poly(ethylene glycol) methacrylate (PEGMA), onto a commercial polyethersulfone (PES) UF membrane. Hydrophilization via blend polymer membrane with hydrophilic additive was performed using non-solvent induced phase separation (NIPS). In reactive PS method, the cast membrane was UV-irradiated before coagulation. The resulting membrane characteristic, the performance and hydrophilization stability were systematically compared. The investigated membrane characteristics include surface hydrophilicity (by contact angle /CA/), surface chemistry (by FTIR spectroscopy), and surface morphology (by scanning electron microscopy). The membrane performance was examined by investigation of adsorptive fouling and ultraï¬ltration using solution of protein or polysaccharide or humic acid. The results suggest that all methods could increase the hydrophilicity of the membrane yielding less fouling. Post-modiï¬cation decreased CA from 44.8 Â± 4.2 o to 37.8 Â± 4.2 o to 42.5 Â± 4.3 o de pe nd in g o n t he degree of grafting (DG). The hydrophilization via polymer blend decreased CA from from 65 o to 54 o for PEG concentration of 5%. Nevertheless, decreasing hydraulic permeability was observed after post-modiï¬cation as well as during polymer blend modiï¬cation. Stability examination showed that there was leaching out of modiï¬er agent from the membrane matrix prepared via conventional PS after 10 days soaking in both water and NaOH. Reactive PS could increase the stability of the modiï¬er agent in membrane matrix.
|Subjects:||T Technology > TP Chemical technology|
|Divisions:||Faculty of Engineering > Department of Chemical Engineering|
Faculty of Engineering > Department of Chemical Engineering
|Deposited By:||Dr. Heru Susanto|
|Deposited On:||11 Oct 2012 15:19|
|Last Modified:||12 Oct 2012 14:24|
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