화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Applied Chemistry for Engineering, Vol.32, No.4, 431-441, August, 2021
DOI10.14478/ace.2021.1049  Export Citation
ZIF-8@GO를 함유한 PEBAX-PEI 복합막의 기체투과 특성
Gas Permeation Characteristics of PEBAX-PEI Composite Membranes Containing ZIF-8@GO
이은선, 홍세령1, †
  • 상명대학교 화공신소재학과
  • 1상명대학교 계당교양교육원상명대학교
Eun Sun Yi, and Se Ryeong Hong1, †
  • Department of Chemical Engineering and Materials Science, Sangmyung University, Seoul 03016, Korea
  • 1Kyedang College of General Educations, Sangmyung University, Seoul 03016, Korea
E-mail:
초록
본 연구에서는 PEBAX에 GO과 ZIF-8@GO의 함량을 달리하여 PEBAX/GO-PEI 복합막과 PEBAX/ZIF-8@GO-PEI 복합막을 제조하고, N2와 CO2의 투과 특성을 연구하였다. 전체적으로 PEBAX/GO-PEI 복합막의 N2와 CO2 투과도는 GO 함량이 증가할수록 감소하였고, CO2/N2 선택도는 약간 증가하였다. PEBAX/ZIF-8@GO-PEI 복합막에서도 N2의 투과도는 감소하였으나 CO2는 ZIF-8@GO 1 wt%까지 증가하였고, 그 이후의 함량에서는 감소하였다. CO2/N2 선택도는 ZIF-8@GO1 wt%에서 92.3으로 가장 높은 선택도를 보였는데 이는 PEBAX와의 호환성을 향상시켜 고르게 분산되면서 다공성의ZIF-8의 효과와 함께 CO2에 친화성이 좋은 GO, ZIF-8의 효과를 가장 크게 받았기 때문으로 생각된다. 또한 PEBAX/ZIF-8@GO-PEI 복합막은 ZIF-8@GO 5 wt%를 제외하고 PEBAX-PEI와 PEBAX/GO-PEI 복합막보다 CO2 투과도와 CO2/N2선택도가 모두 향상되면서 Robeson upper bound에 근접하는 결과를 얻었다.
In this study, PEBAX/GO-PEI and PEBAX/ZIF-8@GO-PEI composite membranes were prepared by varying the contents of GO and ZIF-8@GO in PEBAX, and also the gas permeation characteristics of N2 and CO2 was studied. Overall, the N2 and CO2 permeability of the PEBAX/GO-PEI composite membrane decreased as the GO content increased, and the CO2/N2 selectivity slightly increased. In the case of PEBAX/ZIF-8@GO-PEI composite membrane, the permeability of N2 decreased, but CO2 increased to 1 wt% of ZIF-8@GO and then decreased in the content thereafter. The CO2/N2 selectivity at 1 wt% of ZIF-8@GO was 92.3, showing the highest selectivity. This is thought to be due to the greatest effect of GO and ZIF-8 with good affinity for CO2 alongside the effect of porosity ZIF-8 while improving compatibility with PEBAX and dispersing evenly. In addition, PEBAX/ZIF-8@GO-PEI composite membrane improved both CO2 permeability and CO2/N2 selectivity than those of the PEBAX-PEI and PEBAX/GO-PEI membranes, except for ZIF-8@GO 5 wt%. The result was close to the Robeson upper bound.
Keywords:PEBAX;ZIF-8;GO;Permeability;Selectivity
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