Grafting of regenerated cellulose membrane by surface-initiated atom transfer radical polymerization and its pH-resposive behavior

Regenerated cellulose (RC) membranes which have pH modulated permeability have been prepared by anchoring the hydroxyl groups on the membrane surface with 2-bromoisobutyryl bromide, followed by grafting with acrylic acid (AA) using atom transfer radical polymerization (ATRP). The obtained membranes were analyzed by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared attenuated total reflection spectrometer (ATR-FTIR), scanning electron microscopy (SEM), TGA and the results showed that AA had been grafted onto the membrane surfaces successfully. Then the pH modulated permeability properties were tested by water flux measurement. All results show that the pH modulated permeability properties of a RC membrane can be obtained by surface-initiated ATRP. Copyright (C) 2010 John Wiley & Sons, Ltd.