Photoinduced grafting of ultrafiltration membranes: comparison of poly(ether sulfone) and poly(sulfone)

摘要: Using UV-assisted graft polymerization of three hydrophilic monomers, N-vinyl-2-pyrrolidinone (NVP), 2-acrylamidoglycolic acid monohydrate (AAG) and 2-acrylamido-2-methyl-1-propanesulfonic (AAP), both poly(ether sulfone) (PES) poly(sulfone) (PSf) 50 kDa ultrafiltration (UF) membranes were modified using the dip method with 300 nm wavelength lamps. The concentration monomer irradiation energy supplied to was varied. characterized physicochemically by their degree grafting attenuated total reflection-Fourier transform infrared spectra (ATR-FTIR) wettability a captive air bubble technique. They also filtration performance 0.1 wt.% bovine serum albumin (BSA) solution in phosphate buffered saline (PBS) at 20±2°C pH 7.4. protocol gave several measures including initial water permeability, protein permeability after flushing DI water. Four different modification conditions found that UF superior than base unmodified PES, PSf, or regenerated cellulose (RC) control membrane. Slightly compromised permeabilities compensated for low fouling exhibited excellent cleaning characteristics. All best cases highest concentrations (5 wt.%) lowest (<65 mJ/cm2 PES <130 mJ/cm2 PSf). This work suggests degrees (DG<0.53) intermediate wettabilities () sufficient obtain attractive non-fouling membranes. Since BSA is strongly negatively charged 7.4, it not surprising AAP two four cases. An important finding far more sensitive and, thus, requires less attain desired PSf.