Preparation of negatively charged nanofiltration membrane using blending of polyethersulfone with poly(glycidyl methacrylate) brushes grafted on SBA-15 nanoparticles
Paper ID : 1198-ICNS
Authors:
Mohammadreza Nazari *
Chemistry,Institute for Advanced Studies in Basic Sciences,Zanjan, Iran
Abstract:
To improve PES (polyethersulfone) membrane property, modified SBA-15 nanoparticles can be blended in casting solutions to form nanocomposite membranes. In this study, SBA-15 nanoparticles were modified by coupling with aminopropyltriethoxy silane, then grafted with poly(glycidyl methacrylate) (PGMA) via surface-initiated atom transfer radical polymerization (SI-ATRP) and epoxy groups of the grafted polymer were modified to sulfonic acid groups. TGA analysis was used to quantitatively indicate the relative richness of grafted PGMA on SBA-15. Weight loss (88.76%) in the temperature range 250-450 °C is related to the degradation of the organic parts of the sample. A negatively charged nanofiltration membrane is fabricated via “blending-phase inversion” method. The blended membranes displayed improved water permeability compared to the bare PES. With increasing the content of SBA-15-g-GMA-SO3- from 0.1 to 0.3 wt.%, the membrane water flux increased from 21 (L/m2.h) to 33 (L/m2.h). Nanofiltration performance of the prepared membranes was evaluated by rejection of two organic dyes with different molecular weights (i.e. Coomassie Brilliant Blue and Congo red). The hybrids membranes showed better dye removal performance than the bare PES.
Keywords:
Nanofiltration, Membrane, SI-ATRP, Phase inversion, Membrane modification
Status : Abstract Accepted (Poster Presentation)