Publication Details (including relevant citation information):
Desalination. 2012,307, 26-33.
To fabricate low-cost hydrophilic and antifouling ultrafiltration membranes, in this work, we tuned the membrane
surface hydrophilicity and porosity by adding different amounts of the amphiphilic copolymer
(Pluronic F 127) into polyvinyl chloride (PVC) casting solution. The modified PVC membrane characteristics
including oxygen content, morphology and pore size, surface roughness, hydrophilicity, and permeability
were characterized using X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM),
atomic force microscopy (AFM), contact angle measurement, and flux measurements. With the increase of
Pluronic F 127 content from 0 to 10 wt.%, the oxygen content on the membrane surface increased and then
reached an asymptote when 8 wt.% or greater Pluronic F 127 was used; the pore size and the pore density
both decreased; the membrane surface became more hydrophilic as indicated by the decreasing contact angles;
and the flux declined by 30% when Pluronic F 127 reached 10 wt.%. Overall, the modified PVC membrane
exhibited excellent antifouling feature even with Pluronic F 127 as low as 2 wt.%. Due to the membrane flux
decline at 10 wt.% Pluronic F 127, the optimal addition of Pluronic F 127 was 8 wt.%, which maintained the
antifouling feature and high flux.
Address (URL): http://dx.doi.org/10.1016/j.desal.2012.07.036