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

Document Type : Original Research Paper

Author

Department of Physics, Tafresh University, Tafresh, Iran

Abstract

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 Na2SO4 and NaCl salts, 94% and 38%, respectively. On the other hand, the high-water flux for the two salts mentioned above, 60 L/m2.h and 73 L/m2.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.

Keywords

Challenges in Nano and Micro Scale Science and Technology
Volume 11, Issue 2
November 2023
Pages 1-6

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