title: Preparation, characterization and performance of a novel PVDF/PMMA/TPU blend hollow fiber membrane for wastewater treatment.
abstract: 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 COD(Cr), turbidity and color were about 63, 84 and 63% respectively.
authors.affiliation: School of Environmental Science and Engineering, Dong Hua University, Shanghai 201620, China.
authors.forename: C Y
authors.initials: CY
authors.lastname: Ma
authors.forename: J P
authors.initials: JP
authors.lastname: Huang
authors.forename: D L
authors.initials: DL
authors.lastname: Xi
mesh_terms: D008567:Membranes, Artificial; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D011140:Polyurethanes / Q000737:chemistry*; D011145:Polyvinyls / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods; D018508:Water Purification / Q000295:instrumentation; D005465:Fluorocarbon Polymers
chemical_list: D008567:Membranes, Artificial; D019904:Polymethyl Methacrylate; D011140:Polyurethanes; D011145:Polyvinyls; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers