کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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644174 | 884419 | 2006 | 7 صفحه PDF | دانلود رایگان |
Hydrophilic nanofiltration membranes were prepared by UV-assisted graft polymerization of hydrophilic monomers onto the surface of ultrafiltration membranes made of cardo polyetherketone (PEK-C). The effect of irradiation time and monomer nature on the membrane performances was investigated. Analyses by Fourier transform infrared in attenuated total reflection mode, contact angles of the modified-membrane surface showed that the grafting degree and the hydrophilicity increase with the irradiation/grafting time or irradiation intensity. It was found that the UV-assisted grafting can be performed on the PEK-C chains with or without benzophenone (BP). The grafting inside the pores of the UV sensitive PEK-C membrane is demonstrated by the change of the membrane retention characteristic from that of an UF membrane to that of a nanofiltration membrane. The retentions to sodium chloride and sodium sulfate of the membrane with poly(acrylic acid) grafted for 90 min. UV irradiation under a 1.6 mW/cm2 irradiation were 36 % and 94.1%, respectively, while the water flux through the membrane was ca. 31.3 L m−2 h−1, at 0.4 MPa.
Journal: Separation and Purification Technology - Volume 51, Issue 3, October 2006, Pages 325–331