Journal
RADIATION PHYSICS AND CHEMISTRY
Volume 81, Issue 11, Pages 1763-1769Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.radphyschem.2012.07.001
Keywords
Antifouling; Blend; Hydrophilicity; NVP; PVDF; Porous membrane
Funding
- National Basic Research Program [2009CB930400, 2010CB735505, 2012CB821500]
- National Natural Science Foundation of China [21174086, 21074069, 91127047]
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The hydrophilic PVDF-g-PVP powder was used as additive to prepare a series of PVDF/PVDF-g-PVP blend porous membranes via an immersion precipitation phase inversion process. FTIR-AIR measurements confirmed that the hydrophilic PVP preferentially segregated to the interface between membrane and coagulant. SEM images showed that there was no big change in the membrane cross-section with the amount of PVDF-g-PVP increased. However, the membrane surface roughness increased with the amount of PVDF-g-PVP increased according to AFM data. The mean pore size of membranes reached max when the amount of PVDF-g-PVP was 10 wt%. The water contact angle and filtration experiments revealed that the surface enrichment of PVP endowed the membranes with significantly enhanced surface hydrophilicity and protein-adsorption resistance. The flux recovery of the porous membranes was increased from 37.50% to 77.23% with the amount of PVDF-g-PVP increased from 0 to 50 wt%, also indicating that the antifouling property of the porous membranes was improved. (C) 2012 Elsevier Ltd. All rights reserved.
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