| 초록 |
Thin-film nanocomposite (TFN) membranes with carbon nanotubes (CNTs) are known to show higher water permeability than existing thin-film composite (TFC) membranes. However, CNTs has the poor dispersion stability to most of solvents. Thus, in this study, CNT was modified to have high dispersion stability in the organic solvent which is used to fabricate TFN membranes. First, CNT was oxidized to partially unzipped carbon nanotube (PUCNT) and then alkyl chain was grafted on the PUCNT using octadecylamine. TFN membrane fabricated by incorporating PUCNT-C18 as a nanofiller of organic phase allowed more nanofillers to be exposed to the surface than TFN membranes with oxidized CNT (OCNT). As a results, TFN with PUCNT-C18 showed outstanding pure water flux and chlorine resistance compared to the TFC and TFN with OCNT. These results indicate that controlling the position of nanomaterials could improve the performance of TFN membrane. |
