Membrane properties and anti-bacterial/anti-biofouling activity of polysulfone-graphene oxide composite membranes phase inversed in graphene oxide non-solvent


Mokkapati V. R. S. S. , KOSEOGLU-IMER D. Y. , YILMAZ-DEVECI N., Mijakovic I., Koyuncu İ.

RSC ADVANCES, cilt.7, ss.4378-4386, 2017 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 7 Konu: 8
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1039/c6ra25015g
  • Dergi Adı: RSC ADVANCES
  • Sayfa Sayıları: ss.4378-4386

Özet

A new and facile method for the fabrication of polysulfone-graphene oxide composite membranes is reported, where after casting, phase inversion is carried out with graphene oxide flakes (GO) in a coagulation bath. The membranes were characterized and the morphology was analysed using scanning electron microscopy. A bacterial inhibition ratio of 74.5% was observed with membranes fabricated from a very low concentration of di-water-GO non-solvent (0.048% of GO). The membranes were successfully tested for permeate flux and fouling resistance using activated sludge filtration from an MBR system. The observed trend shows that GO can operate as a protective barrier for membrane pores against the bacterial community. To our knowledge this is the first time where the immersion precipitation mechanism was carried out in a coagulation bath with GO flakes under continuous stirring. Using this method, a very low concentration of GO is required to fabricate membranes with conventional GO composite membrane properties and better selectivity.