| 초록 |
Membrane-based gas separation is a promising process owing to many advantages such as small foot prints, low energy-consumption and easy-to-control. Polymeric membranes are usually used for high permeability and selectivity. Especially, polyimide membranes have excellent properties in mechanical strength, chemical resistance, thermal stability and selective gas transport. For gas separation, however, they showed relatively lower gas permeability than other polymers. Here we demonstrated that the incorporation and proper heat treatment of graphene oxide (GO) can improve the gas separation performance. In this study, we prepared the GO/polyimide nanocomposite membranes to study the effect of the GO contents on the gas permeability and selectivity. GO was prepared by the oxidation of synthetic graphite using modified Hummers method and then mixed with polyimide solution for GO/polyimide composite membranes. |
