期刊
WATER SCIENCE AND TECHNOLOGY
卷 65, 期 6, 页码 1041-1047出版社
IWA PUBLISHING
DOI: 10.2166/wst.2012.930
关键词
hollow fiber membrane; polymethylmethacrylate; polyvinylidene fluoride; thermoplastic polyurethane; ultrafiltration properties; wastewater treatment
资金
- S&T project on treatment and control of water pollution [2009ZX07529-003]
- National Science and Technology Ministry [2009BAC65B07]
- National Science Foundation of Shanghai [11ZR1400800]
- China Postdoctoral Science Foundation [20110490645]
Polyvinylidene fluoride (PVDF)/polymethylmethacrylate (PMMA)/thermoplastic polyurethane (TPU) blend hollow fiber membranes were successfully prepared by the wet-spinning method with the loading of PMMA and TPU in a range of polymer concentrations varying from 0 to 20 wt% and at a total polymer concentration of 16 wt%. The influence of the addition of PMMA and TPU on the morphologies and the properties of such prepared membranes was investigated through FTIR-ATR, SEM, viscosity measurements, UF experiments and mechanical strength tests. Based on the experimental results, the compatibility of the PVDF, PMMA and TPU blend was best under the conditions of the PVDF-rich phase. The elongation at break of the membrane increased to a maximum of 146% with increase in the TPU concentration to 20 wt% in dope solution. The addition of PMMA increased the water permeation flux from 120 to 195 L/(m(2) h) initially. The flux then decreased when PMMA concentration was increased to over 10 wt%. The membranes obtained at optimized blending ratio were applied to the dyeing process wastewater filtration. During continuous filtration for 8 h, the flux was stabilized at about 20 L/(m(2) h) at 0.1 MPa. The reduction in CODCr, turbidity and color were about 63, 84 and 63% respectively.
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