Structure and properties of polyurethane/poly(vinylidene difluoride) blend hollow fiber membrane
Zhaoxu Wang · Membrane science and technology/Membrane science and technology series · 2007
Polyurethane/polyvinylidene difluoride(PU/PVDF) blend hollow fiber membranes were prepared by melting-spinning and drawing.The influence of drawing on the structure of membrane was analyzed.The pressure-responsibility of the membrane was analyized by the relationships of water flux and transmembrane pressure and the different pressure-responsibility property of the membrane with different draw ratio was also studied.Results showed that drawing improved the permeability of the interfacial micro-voids of the membranes,and thus increased the water flux of the membranes.With the increasing in draw ratio,the reversion property of the interfacial micro-voids of the PU/PVDF blend hollow fiber membrane is also improved.