| 초록 |
Recently, a few-layered graphene oxide (GO), which high CO2/N2 selective characters in the humidified feed, has been extensively investigated as a membrane material for gas and liquid separation. Although GO membrane is considered as one of promising membranes, it has a limitation to apply for practical application because of low CO2 permeance and low stability under dry condition. As such, in this study, we fabricated CO2-philic polymers and GO composite membranes by using GO as a filler for high CO2/N2 selectivity. We used two kinds of PEO-containing polymers (PEBAX®1657 and poly (ethylene glycol) methyl ether acrylate (PEGMEA)) to increase CO2 permeability by controlling the ratio of free volume in polymer networks. PEGMEA was used as an embedment for increasing free volume, finally, it led to high permeability. High CO2 permeability (~850 barrer) and high CO2/N2 selectivity (~55) were achieved in CO2-philic composite membranes. |
