Polyethersulfone (PES)-silver composite UF membrane: Effect of silver loading and PVP molecular weight on membrane morphology and antibacterial activity

被引:238
作者
Basri, H. [1 ,2 ]
Ismail, A. F. [1 ,3 ]
Aziz, M. [1 ]
机构
[1] Univ Teknol Malaysia, Adv Membrane Technol Res Ctr AMTEC, Johor Baharu 81310, Johor, Malaysia
[2] Univ Tun Hussein Onn Malaysia, Fac Sci Art & Heritage, Dept Sci & Math, Batu Pahat 86400, Johor, Malaysia
[3] Univ Teknol Malaysia, Fac Petr & Renewable Energy Engn, Johor Baharu 81310, Johor, Malaysia
关键词
Polyethersulfone-silver; Composites; Polyvinylpyrrolidone; Antibacterial; ULTRAFILTRATION MEMBRANES; NANOFILTRATION MEMBRANES; NANOPARTICLES; POLYVINYLPYRROLIDONE; PERFORMANCE; PARTICLES; ROUTE; FILM; MICROFILTRATION; HYDROPHILICITY;
D O I
10.1016/j.desal.2010.11.010
中图分类号
TQ [化学工业];
学科分类号
081705 [工业催化];
摘要
Polyethersulfone-silver composite membranes were fabricated via a simple phase inversion method by using silver nitrate (AgNO3) as an antibacterial agent and polyvinylpyrollidone (PVP) of molecular weight 10,000, 40,000 and 360,000 Da as dispersant in the dope formulation. The effect of AgNO3 loading on the resulting membrane was studied using field emission scanning electron microscope (FESEM), energy dispersive X-ray (EDX) and X-ray photoelectron spectroscopy (XPS) techniques. The silver loss during fabrication and pure water filtration was measured using inductive-coupled plasma mass spectrometer (ICP-MS). From XPS and EDX examinations, it was observed that the resulting membrane prepared from 2 wt.% AgNO3 and PVP of 360,000 Da exhibited high concentration of Ag mainly due to the high Ag-particle entrapment in the membrane structure. The uniform distribution of Ag particles has contributed significantly to 100% inhibition against Escherichia coli (E. coli) growth within 24 h incubation. In addition, the results of pure water filtration test showed minimum silver loss during operation, indicating better stability of membrane produced in terms of Ag-entrapment in membrane structure. Based on the findings, it can be concluded that PES-silver composite membrane with PVP of 360,000 MW offers huge potential membrane for bacteria removal and disinfection. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:72 / 80
页数:9
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