Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 445, Issue -, Pages 146-155Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2013.05.026
Keywords
UV-assisted graft polymerization; Surface modification; Capsaicin derivative moiety; Antifouling; Antibacterial activity
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Funding
- National Natural Science Foundation of China [21006100, 21106139]
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In this study, the covalently bonding of N-(3-tert-butyl-2-hydroxy-5-methylbenzyl) aciylamide (MBHBA) onto polysulfone (PSf) ultrafiltration membrane surface was performed via UV-assisted graft polymerization. The membranes were characterized by FTIR-ATR, Contact Angle (CA), SEM, AFM, cross-flow filtration unit, antifouling and antibacterial measurements. Verification of MBHBA that photo-chemically grafted onto the PSf membrane surfaces is confirmed by carbonyl stretching vibration at similar to 1665 cm(-6). The modified membranes show lower hydrophilicity and surface roughness when compared with the pristine membrane. SEM images suggest that membrane pore size is decreased slightly, which is in accordance with the increase of bovine serum albumin (BSA) rejection rate. Notably, BSA filtration test suggests that the antifouling property of the modified membrane is enhanced, even though there is a decrease in the hydrophilicity of the modified membrane surface. Most importantly, the PSf membrane modified with MBHBA exhibits excellent antibacterial properties against Escherichia coli, which implies that the membrane has a good antibiofouling surface. (c) 2013 Elsevier B.V. All rights reserved.
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