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

作者：Adams Feyisayo V; Nxumalo Edward N; Krause Rui W M; Hoek Eric M V; Mamba Bhekie B^*

来源：Journal of Membrane Science, 2012, 405: 291-299.

DOI：10.1016/j.memsci.2012.03.023

• Water treatment
• Nanofiltration
• Hydrophilicity
• Morphology
• Porosity
• Cadmium

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.

• 出版日期2012-7-1