Graphene oxide based membrane: adhesion enhancement by plasma treatment and diffusion study of potassium chloride ions
14:30 - 15:00
Auditorium between bldg. 4 & 5, level 0
Graphene oxide (GO) and reduced Graphene oxide (rGO) are 2D materials which exhibit unique anti-fouling and anti-bacterial properties along with high water permeability through its 2D channels, good selectivity and good thermal, mechanical and chemical stability. These unique properties offer the opportunity to incorporate GO and rGO and synthesize new membranes for water filtration applications such as Forward Osmosis, pervaporation, Reverse Osmosis, ultrafiltration and nanofiltration.
In this work, we report a diffusion study of KCl ions through plasma treated polyethersulfone (PES) membranes which have been coated with GO and rGO. Layer by Layer (LbL) spin coating process was used to deposit thin Go and rGO films on the PES membrane surface. The membranes were characterized by scanning electron microscopy (SEM), water contact angle measurement (WCA), Fourier transform infrared spectroscopy (FTIR) and Atomic force microscopy (AFM). A side by side diffusion cell was used to evaluate ions blocking performance of GO and rGO layers. The results showed that rGO layers deposited on PES samples significantly enhanced KCl ion blockage to ~93% as compared to 28% ion blockage of bare PES membranes. However, with the GO layers, the PES membranes achieved ~57% KCl ion blockage.