Author/Authors :
Liping Zhu، نويسنده , , BAO-KU ZHU?، نويسنده , , Li Xu، نويسنده , , Yong-Xiang Feng، نويسنده , , Fu Liu، نويسنده , , You-Yi Xu، نويسنده ,
Abstract :
Graft polymerization of acrylic acid (AA) onto porous polyethersulfone (PES) membrane surfaces was developed using corona discharge in
atmospheric ambience as an activation process followed by polymerization of AA in aqueous solution. The effects of the corona parameters and
graft polymerization conditions on grafting yield (GY) of AA were investigated. The grafting of AA on the PES membranes was confirmed by
ATR-FTIR and X-ray photoelectron spectroscopy (XPS) analysis. Porosimetry measurements indicate the average pore diameters and porosities of
the modified membranes decrease with the increase of the GY. The hydrophilicity and surface wetting properties of the original and modified
membranes were evaluated by observing the dynamic changes of water contact angles. It is found that the grafting of AA occurs not only on the
membrane surfaces, but also on the pore walls of the cells inside the membrane. The permeability experiments of protein solution reveal that the
grafting of PAA endows the modified membranes with enhanced fluxes and anti-fouling properties. The optimized GYof AA is in the range of 150–
200 mg/cm2. In addition, the tensile experiments show the corona discharge treatment with the power lower than 150 Wyields little damage to the
mechanical strength of the membranes.