| 초록 |
A graft copolymer, poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM), was synthesized via atom transfer radical polymerization (ATRP), and then the copolymer was composed of hydrophilic site, PVP, and hydrophobic site, POEM. Mesoporous MgTiO3 perovskite showing a high porosity was prepared with solvothermal reaction using the above copolymer as structure-directing agent. Then the mixed matrix membrane (MMM) was prepared with solution containing the mesoporous MgTiO3 perovskite dispersed the copolymer solution. The mesoporous MgTiO3 was well-dispersed in PVC-g-POEM solution due to its similar density with the copolymer as compared to dense perovskite. Because the average pore diameter the MgTiO3 perovskite was about 10.4 nm, it was effective to facilitating gas transport via Knudsen diffusion. The permeability of MMM was greater than those of MMM with only MgO or TiO2, indicating the simultaneous improvement of solubility and diffusivity in the former. The MMM with MgTiO3 25 wt % exhibited a CO2 permeability improvement of 140% up to 138.7 Barrer without a large loss of CO2/N2 selectivity. |
