| 초록 |
Nanofiltration membrane is effective to purify water contaminated with small organics and multivalent ions. Recently, graphitic materials have been used to fabricate the nanofiltration membrane due to its precise molecular separation enabled by narrow interlayer spacing. In this work, one-pot synthesis of MWNT/GONR hybrid was achieved by controlling the oxidation degree of MWNT using KMnO4 as an oxidizer. After oxidation, oxygen functional groups were generated on the surface of the MWNTs and some of the MWNTs are converged to GONRs by unzipping the MWNTs. The MWNT/GONR can be soluble in various solvents and be concentrated up to the concentration of 40 mg/mL. When the MWNT/GONR hybrid dispersion was used to coat the membrane layer on porous support via slot-die coater, the prepared MWNT/GONR membrane showed high solvent flux and molecular separation performance with excellent stability in nanofiltration tests. |
