| 초록 |
Graphene-based membranes are promising for organic solvent nanofiltration (OSN) due to their chemical stability in harsh conditions. The pore generation on graphene surface has been widely utilized to improve molecular permeation. Furthermore, nanoporous graphene should be prepared by environmentally friendly and scalable fabrication method for industry. In this work, we fabricated graphene oxide (GO) membranes using a slot-die coater without the dispersion of nanoporous graphene flakes in a harsh organic solvent. Following, the GO membrane was treated with a hot-pressing to activate nanopores on the graphene surface. The prepared membrane exhibited ultrafast organic solvent permeance. In addition, the membrane showed different OSN performance depending on the hot-pressing time, which is attributed to the control of pore size and interlayer spacing of graphene. |
