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Cyclodextrin‐dendrimer functionalized polysulfone membrane for the removal of humic acid in water
Author(s) -
Malinga Soraya P.,
Arotiba Omotayo A.,
Krause Rui W. M.,
Mapolie Selwyn F.,
Diallo Mamadou S.,
Mamba Bhekie B.
Publication year - 2013
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.39728
Subject(s) - polysulfone , membrane , humic acid , attenuated total reflection , contact angle , chemistry , cyclodextrin , nanofiltration , polymer chemistry , fourier transform infrared spectroscopy , scanning electron microscope , interfacial polymerization , chemical engineering , nuclear chemistry , materials science , infrared spectroscopy , chromatography , organic chemistry , polymer , monomer , biochemistry , fertilizer , engineering , composite material
Commercial polysulfone (PSf) membranes were crosslinked with a β‐cyclodextrin‐poly (propyleneimine) (β‐CD‐PPI) conjugate which had β‐CD pendant arms using trimesoyl chloride (TMC) by interfacial polymerization. The morphology and physicochemical properties of the nanofiltration membranes were characterized using Fourier transform infrared/attenuated total reflectance (FT‐IR/ATR) spectroscopy, scanning electron microscopy (SEM), atomic force microscopy (AFM), and cross‐flow filtration system. Water‐contact angle, water‐intake capacity, and rejection capacities of the membranes were evaluated. The β‐CD‐G4 (generation 4)‐PPI‐PSf and β‐CD‐G3 (generation 3)‐PPI‐PSf membranes both exhibited high humic acid rejection of 72% as compared to the commercial PSf which exhibited 57%. The modified membranes were also more hydrophilic (36° to 41°) than PSf (76°). These results suggest that β‐CD‐PPI nanostructures are promising materials for the synthesis of membranes for the removal of humic acid from water. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 4428–4439, 2013