| 초록 |
This work focused on improving the performance of polyamide thin-film composite membranes via the co-solvent-assisted interfacial polymerization (CAIP) technique. In this study, we examined, compared, and optimized the effects of adding acetone in hexane, heptane, and isopar G organic solvents on the structural and physicochemical properties of the membrane. The membrane characteristics were also evaluated by analyzing the long-term stability and measuring the water flux and NaCl/MgCl2 rejection. The membrane formed a narrow miscibility zone between the two solutions by reducing the solubility difference and interfacial tension, which ultimately formed a thicker reaction zone and a multi-layered polyamide structure. The water flux performance of the membrane showed a fold by increasing from 27.5 LMH to 52 LMH with the negligible sacrifice of salt rejection. With CAIP, the membrane performance can be increased without compromising rejection and membrane strength. The CAIP membranes were found to be promising candidates for brackish water desalination and water treatment. |
