Surface zwitterionic functionalized graphene oxide for a novel loose nanofiltration membrane
MetadataShow full item record
© The Royal Society of Chemistry 2016. Surface zwitterionization of graphene oxide (GO) was firstly conducted by grafting poly(sulfobetaine methacrylate) (PSBMA) onto the GO surface via reverse atom transfer radical polymerization (RATRP). Then, a novel type of GO-PSBMA/polyethersulfone (PES) loose nanofiltration membrane (NFM) was constructed by mixing with modified GO composites via phase inversion. FTIR, XRD, TEM, XPS and TGA were applied to analyze the chemical composition and morphology, confirming a favorable synthesis of GO-PSBMA composites. Besides, the effect of the embedded GO-PSBMA nanoplates on the morphology and overall performance of the hybrid membranes was systematically investigated based on the SEM images, water contact angle, zeta potential, and fouling parameters. It was found that the water flux of the hybrid membrane was greatly enhanced from 6.44 L m-2h-1bar-1to 11.98 L m-2h-1bar-1when the GO-PSBMA content increased from 0 to 0.22 wt%. The antifouling tests revealed that the GO-PSBMA embedded membranes had an excellent antifouling performance: a high flux recovery ratio (ca. 94.4%) and a low total flux decline ratio (ca. 0.18). Additionally, the hybrid membranes exhibited a distinct advance in the mechanical strength due to the addition of highly rigid GO. Notably, compared with unmodified membranes, the hybrid membranes had a higher retention of Reactive Black 5 (99.2%) and Reactive Red 49 (97.2%), and a lower rejection of bivalent salts (10% for Na2SO4) at an operational pressure of 0.4 MPa, rendering the membranes promising for dye/salt fractionation.
Showing items related by title, author, creator and subject.
Fabrication of a mixed matrix membrane with in situ synthesized quaternized polyethylenimine nanoparticles for dye purification and reuseZhu, J.; Zhang, Y.; Tian, M.; Liu, Jian (2015)© 2015 American Chemical Society. A facile and novel method for the fabrication of mixed matrix membranes (MMMs) has been developed, i.e., in situ synthesis of quaternized polyethylenimine (QPEI) soft nanoparticles (SNPs) ...
Zhao, Q.; Hou, J.; Shen, J.; Liu, Jian; Zhang, Y. (2015)© The Royal Society of Chemistry. Membrane fouling by microbial and organic components is considered as the "Achilles heel" of membrane processes as it not only reduces the membrane performance but also leads to membrane ...
Fabrication of a novel "loose" nanofiltration membrane by facile blending with Chitosan-Montmorillonite nanosheets for dyes purificationZhu, J.; Tian, M.; Zhang, Y.; Zhang, H.; Liu, Jian (2015)© 2014 Elsevier B.V. The novel hybrid material, clay/polymer nanocomposite has represented a desired alternative for designing the mixed matrix membranes (MMMs) due to their excellent overall performance, such as good ...