Preparation of PES@RGO Ultrafiltration Membranes by Gamma-ray Pre-Irradiation and Its Filtration Performance for Emulsified Oil Aqueous Solution

In this study, graphene oxide (GO) was reduced to reduced graphene oxide (RGO), then introduced into the casting solution as an additive and finally prepared the PES@RGO membrane. The molecular structure and thermodynamic properties of the modified membranes were tested by Fourier transform infrared spectroscopy (FTIR) and thermal gravimetric analysis (TGA), respectively. The results confirmed the effective load of RGO in the PES@RGO membranes. The micro-section and surface structure of the membrane was analysed by scanning electron microscope (SEM). The addition of RGO made the membrane cross-section show a finger-like pore structure, and led to a certain degree of blockage of the membrane surface. The introduction of RGO reduced the permeability of the membrane to a certain extent, but the rejection rate of emulsified oil aqueous solution increased significantly, and the anti-fouling performance of the membrane was also effectively improved.