In this study, a MWCNT(multi-wall carbon nanotube) was added to polysulfone(PSf) support layer to improve flux of TFC(thin film composite) RO(reverse osmosis) membrane. Two different kinds of MWCNT were used. Surfaces of some MWCNTs were modified hydrophilically through acid treatment, while those of other MWCNTs were modified through heat treatment to maintain their hydrophobicity. MWCNT/PSf support layer was prepared by adding PSf to the NMP mixed solvent containing 0.1 wt% MWCNTs using a phase inversion method. The surface porosity of the MWCNT/PSf support increased by 42~46% while its surface pore size being maintained. The TFC RO membrane made of MWCNT/PSf support layer showed a 20% flux increase while its salt rejection characteristics is sustained. In addition, the MWCNT/PSf support layer has better mechanical stability than the PSf support layer, there resulting in an increased resistance of flux reduction due to physical pressure.

ABSTRACT
1. 서 론
2. 재료 및 실험방법
    2.1 재료 및 시약
    2.2 탄소나노튜브 정제
    2.3 MWCNTs 특성 분석
    2.4 분리막 제조 및 특성평가
    2.5 분리막 여과 실험
3. 결과 및 고찰
    3.1 MWCNTs 특성
    3.2 MWCNTs/PSf 지지체의 특성
    3.3 MWCNTs/PSf 지지체의 플럭스 및 MWCO
    3.4 MWCNTs/PSf TFC RO막의 플럭스 및 염배제율
4. 결 론
References

• 민충식(경남대학교 토목공학과) | Choong-Sik Min (Department of Civil Engineering, Kyungnam University)
• 김승현(경남대학교 토목공학과) | Seung-Hyun Kim (Department of Civil Engineering, Kyungnam University) Corresponding author