Effect of membrane hydrophilization on ultrafiltration performance for biomolecules separation
| Main Authors: | Susanto, Heru, A., Roihatin, N., Aryanti, D.D., Anggoro, m., Ulbricht |
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| Format: | Article PeerReviewed application/pdf |
| Terbitan: |
Elsevier
, 2012
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| Subjects: | |
| Online Access: |
http://eprints.undip.ac.id/36349/1/hs_MSE_C.pdf http://www.elsevier.com/locate/msec/ http://eprints.undip.ac.id/36349/ |
Daftar Isi:
- 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 ± 4.2 o to 37.8 ± 4.2 o to 42.5 ± 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.