Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 455, Issue -, Pages 15-23Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2013.12.060
Keywords
Fluorinated polyamine; Surface grafting; Polyamide nanofiltration membrane; Low surface free energy; Antifouling
Categories
Funding
- National Science Fund for Distinguished Young Scholars [21125627]
- Tianjin Natural Science Foundation [13JCYBJC20500]
- Program of Introducing Talents of Discipline to Universities [B06006]
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new kind of fluorinated polyamine was successfully synthesized and grafted onto the polyamide membrane surface to fabricate an antifouling nanofiltration membrane with low surface free energy. The surface composition of the fluorinated polyamide nanofiltration membrane was confirmed by Fourier transform infrared spectroscopy (FT4R) and X-ray photoelectron spectroscopy (XPS). The membrane cross-section morphology was observed by a field emission scanning electron microscopy (FESEM). The presence of perfluoroalkyl groups on the membrane surface significantly lowered the surface free energy from 60.0 to 44.4 mJ/m(2). The filtration experiment results indicated that the surface fluorination did not lower the separation performance of the polyamide nanofiltration membrane significantly. The antifouling experiment results demonstrated that the fluorinated polyamide nanofiltration membranes exhibited superior antifouling property, that is, high flux recovery ratio (similar to 985%) and low total flux decline ratio (similar to 11%) during protein aqueous solution and humic acid aqueous solution filtration. (C) 2013 Elsevier B.V. All rights reserved,
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