온실가스의 주범인 이산화탄소를 효과적으로 분리하기 위하여 이산화탄소와 친화성이 좋은 에틸렌글리콜 사슬이 도입된 폴리설폰 기반의 고분자와 아민이 기능화된 ZIF8 무기입자 (ZIF8-A) 를 복합화한 유무기 복합 기체분리막 (MMM)을 제조하였다. 제조된 분리막은 XRD, TGA, FT-IR, SEM 및 NMR 분석을 통해 분리막의 구조와 물성특성을 확인하였다. CO2/N2, CO2/CH4에 대한 가스 투과 특성을 조사하였고, 그 결과 ZIF8-A 구조 내 아민 함량 증가에 따라 이산화탄소에 대한 투과도 및 선택도가 증가하는 경향을 나타냈다. 이는 ZIF8-A 구조 아민기능기와 에칠렌글라이콜 사슬과의 입자와의 계면저항성이 낮은 것에 기인한 것으로 판단하였다.

A series of amphiphilic block copolymers consisting of hydrophobic poly(methyl methacrylate) (PMMA) and poly(polyethylene glycol methyl ether methacrylate) (PPEGEMA) were synthesized by Cu based ATRP and utilized as an additive to prepare asymmetric ultrafiltration (UF) membranes by non-solvent induced phase separation (NIPS) with PVDF. Obtained PVDF based UF membranes gave in-situ hydrophilic surfaces on the hydrophobic PVDF matrix because of strong compatibility PMMA block segment to PVDF and the hydrophilicty of PPEGMA block segment to the non-solvent (water), which showed improved water flux in comparison to neat PVDF UF membrane.

Amine functionalized polysulfone (PSf) based ultrafiltration (UF) membranes were prepared by non-solvent induction phase separation method (NIPS) with reactive PSf (matrix) and polyehtyleneimine (PEI) (additive), where PEI was reacted in dope solution to give surface modified PSf-UF membrane. Unreacted PEI might be worked as a forming agent during NIPS, however it was not much affected to the pore structures. Obtained membranes showed enhanced hydrophilic property on the membrane, which increased the water flux without loss of the rejection rate of PEO (100 K).