Baicang Liu - High Performance Ultrafiltration Membrane Composed of PVDF Blended with Its Derivative Copolymer PVDF-g-PEGMA

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  Publication Details (including relevant citation   information):

  Baicang Liu, Chen Chen, Tong Li, John Crittenden,

  Yongsheng Chen, High Performance Ultrafiltration Membrane   Composed of

  PVDF Blended with Its Derivative Copolymer PVDF-g-PEGMA, Journal   of

  Membrane Science,


  Amphiphilic graft copolymers were fabricated from a   poly(vinylidene fluoride) (PVDF) backbone that was grafted with   poly(ethylene glycol) methyl ether methacrylate (PEGMA)   (PVDF-g-PEGMA) using atom transfer radical polymerization (ATRP)   method. An intriguing membrane of periodic pillar-like or sphere   structures was formed using PVDF/PVDF-g-PEGMA block copolymer   mixtures that were dissolved in suitable solvents. X-ray   photoelectron spectroscopy (XPS), scanning electron microscopy   (SEM), atomic force microscopy (AFM), contact angle measurement,   and flux performance tests were conducted to determine the   membrane characteristics. The results show that the defect-free   high performance ultrafiltration membrane can be fabricated by   adding 10 wt.% or 15 wt.% PVDF-g-PEGMA to the PVDF backbone   material using the phase inversion method. The permeate fluxes of   the fabricated membrane with 10 wt.% and 15 wt.%   PVDF534K-g-PEGMA are 5110 (L/m2·h·bar) and   5170 (L/m2·h·bar), respectively, for deionized water   under 0.07 MPa. The TOC (sodium alginate) removal efficiencies of   PVDF membranes with 10 wt.%, and 15 wt.%   PVDF534K-g-PEGMA are 90.97%, and 87.19%, respectively.   Furthermore, the removals of Suwannee River humic acid that   contained 2 mM CaCl2 and 10 mM Ca(OH)2 for   the PVDF membrane with 10 wt.% PVDF534K-g-PEGMA are   72.11% and 77.69%, respectively. This defect-free   high-performance membranes show good potential for water   treatment applications.

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