Improving the performance of polyvinyl alcohol membrane by deposition of graphene oxide nanostructures using non-thermal plasma

In this research, membranes based on polyvinyl alcohol polymer were surface modified using graphene oxide nanostructures, and the effect of this layering on the performance and properties of the membrane was investigated and evaluated. Graphene oxide nanostructures were produced using a non-thermal plasma jet. The surface morphology and hydrophilicity of prepared membranes were studied using the AFM, SEM, FTIR, and CA analyses. The analyses showed a rougher surface with more hydrophilicity for the modified membranes than the pure PVA membrane. Also, the separation performance of membranes using a cross-flow filtration system was investigated for different salt solutions. The modified nanofiltration membrane with graphene oxide, showed good separation performance for Na۲SO۴ and NaCl salts, ۹۴% and ۳۸%, respectively. On the other hand, the high-water flux for the two salts mentioned above, ۶۰ L/m۲.h and ۷۳ L/m۲.h respectively, was obtained for the modified nanofiltration membrane with graphene oxide. In sum, this study shows that the separation performance of nanofiltration membranes can be effectively improved by adjusting the different factors in the groups that changed the graphene oxide surface. Also, membranes modified using graphene oxide nanostructures have more suitable antibacterial properties compared to other unmodified membranes.

کلیدواژه ها:

Membrane nanofiltration ، plasma modification ، graphene oxide nanostructures ، non-thermal plasma jet ، desalination performance