Preparation and characterization of polysulfone/β-cyclodextrin polyurethane composite nanofiltration membranes

被引:94
作者
Adams, Feyisayo V. [1 ]
Nxumalo, Edward N. [1 ]
Krause, Rui W. M. [1 ]
Hoek, Eric M. V. [2 ,3 ,4 ]
Mamba, Bhekie B. [1 ]
机构
[1] Univ Johannesburg, Dept Chem Technol, ZA-2028 Doornfontein, South Africa
[2] Univ Calif Los Angeles, Los Angeles, CA 90095 USA
[3] Dept Civil & Environm Engn, Los Angeles, CA 90095 USA
[4] Calif NanoSyst Inst, Los Angeles, CA 90095 USA
关键词
Water treatment; Nanofiltration; Hydrophilicity; Morphology; Porosity; Cadmium; ULTRAFILTRATION MEMBRANES; BETA-CYCLODEXTRIN; SURFACE MODIFICATION; CELLULOSE-ACETATE; SEPARATION; WATER; PERVAPORATION; PERFORMANCE; REMOVAL; PLASMA;
D O I
10.1016/j.memsci.2012.03.023
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
This work presents the preparation and characterization of polysulfone (PSf)/beta-cyclodextrin (beta-CD) polyurethane composite membranes using a modified phase inversion technique. beta-CD polyurethane was blended with PSf at concentrations of 0-10% to prepare nanofiltration (NF) membranes for selective removal of Cd2+ ions from water at a working pH of 6.9. Mixed matrix beta-CD polyurethane/PSf membranes were more hydrophilic with higher water permeability and higher Cd2+ rejection (up to 70%). However, the mixed matrix membranes were also rougher, less porous, took up more water, and were less mechanically stable. Further, FT-IR results indicate hydrogen bonding interactions between beta-CD polyurethane and PSf, which suggests that the materials are compatible. Dead-end filtration tests suggest that mixed matrix membranes have higher water flux. This suggests that the combination of beta-CD polyurethane with PSf can produce viable nanofiltration with improved flux without a compromise on its rejection ability. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:291 / 299
页数:9
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