Compatibility of Polyvinylidene Difluorid/Polyurethane and Preparation of Composite Tubular Membrane

Dan Ying Zuo; Hong Jun Li; Chang Hai Yi; Hou Lei Gan

doi:10.4028/www.scientific.net/AMR.936.212

Paper Titles

Numerical Research of the Beryllia Ceramics Formation Process
p.187

Cu(In,Ga)Se₂ Films Deposited by Sputtering with Single Cu(In,Ga)Se₂ and Cu-Ga-In₂Se₃ Targets and a Subsequent Selenization Procedure
p.197

Effect of Hydrogen Dilution Ratio and Substrate Roughness on the Microstructure of Intrinsic Microcrystalline Silicon Thin Films
p.202

The Photoluminescence from (Eu, Yb) Co-Doped Silicon-Rich Si Oxides
p.207

Compatibility of Polyvinylidene Difluorid/Polyurethane and Preparation of Composite Tubular Membrane
p.212

Preparation and Properties of Two-Dimensional Braid Heterogeneous-Reinforced Polyvinylidene Fluoride Hollow Fiber Membrane
p.218

Effect of Ethanol Composition in Water Coagulation Bath on Structure and Performance of Homogeneous-Reinforced Polyvinyl Chloride Hollow Fiber Membranes
p.226

Fabrication and Characterization of CuO Micro-Dimensional Structures for Superhydrophobic Surface
p.233

Low Temperature Preparation of Aluminum Titanate Film via Sol-Gel Method
p.238

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Compatibility of Polyvinylidene Difluorid/Polyurethane and Preparation of Composite Tubular Membrane

Abstract:

The compatibility of polyvinylidene difluorid (PVDF) and polyurethane (PU), the thermodynamics of the PVDF/PU/DMF (N-N-Dimethylformamide) membrane-forming systems were studied, and the composite tubular membranes of PVDF/PU-PET knitted fabric tube were prepared by the immersion precipitation phase inversion method. The results showed that the PVDF/PU system was partly compatible by the measurements of the solubility parameter theory, the mixing enthalpy, the viscosity. With PU content increasing, the gelation values increased and the instantaneous liquid-liquid phase separation was preferred to occur. The water flux of the composite tubular membranes were enhanced from 1264.81 to 2165.35 L/m².h with PU content increasing from 10wt% to 40wt%, which resulted from the an increment of the membrane porosity and the improvement of the hydrophilicity.