Graphene oxide hybrid poly(p-phenylene sulfide) nanofiltration membrane intercalated by bis(triethoxysilyl) ethane

Using organosilicon to crosslink and intercalate GO sheets, we made a hybrid GO layer on the surface of poly(p-phenylene sulfide) (PPS) microporous membrane support. A large number of oxygen-containing groups were introduced into the interlayer of GO layer, forming hydrophilic channels, more free interlayer space and nanochannels, which greatly enhanced the permeation and transmission of hydrophilic solvent. Furthermore, the introduced organosilicon species could improve the stability of PPS-GO@PB hybrid membranes. Water and ethanol were used as models to WA the permeability of hybrid membranes, the results showed that the water and ethanol fluxes of GO@PB hybrid PPS membranes increased significantly. Especially, the water and ethanol fluxes of PPS-0.1GO@2.5PB membrane achieved 34.3 and 12.8 LMH under the pressure of 0.5 MPa. Four kinds of dyes were used as model pollutants to test the separation efficiency of the modified membrane, showing the high rejection of 99.2% (MB), 93.8% (MEB), 90.2% (BS) and 92.4% (RB), respectively. In the test of operation stability and solvent resistance, PPS-0.1GO@2.5PB membrane showed excellent stability and solvent resistance. These findings suggest that the as-prepared GO@PB hybrid PPS membrane will be great potential for utilization in the field of separation and purification of organic solvents and small molecules.