Preparation of PEBA/PDMS Blend Membranes for Separation of Carbon Dioxide

PEBA/PDMS 블렌드막의 제조 및 이산화탄소 분리 특성 연구

  • Park, You-In (Environment & Resources Research Center, Korea Research Institute of Chemical Technology) ;
  • Kang, Ha-Sung (Environment & Resources Research Center, Korea Research Institute of Chemical Technology) ;
  • Nam, Mi-Yeon (Environment & Resources Research Center, Korea Research Institute of Chemical Technology) ;
  • Lee, Eun-Woo (Environment & Resources Research Center, Korea Research Institute of Chemical Technology) ;
  • Kim, Beom-Sik (Environment & Resources Research Center, Korea Research Institute of Chemical Technology) ;
  • Lee, Sang-Hak (Environment & Resources Research Center, Korea Research Institute of Chemical Technology) ;
  • Suh, Jeong-Kwon (Environment & Resources Research Center, Korea Research Institute of Chemical Technology) ;
  • Suh, Dong-Hak (Department of Chemical Engineering, Hanyang University) ;
  • Feng, Xianshe (Department of Chemical Engineering, University of Waterloo)
  • 박유인 (한국화학연구원 환경자원연구센터) ;
  • 강하성 (한국화학연구원 환경자원연구센터) ;
  • 남미연 (한국화학연구원 환경자원연구센터) ;
  • 이은우 (한국화학연구원 환경자원연구센터) ;
  • 김범식 (한국화학연구원 환경자원연구센터) ;
  • 이상학 (한국화학연구원 환경자원연구센터) ;
  • 서정권 (한국화학연구원 환경자원연구센터) ;
  • 서동학 (한양대학교 화학공학과) ;
  • Published : 2009.03.30

Abstract

Poly(ether block amide) (PEBA)/poly(dimethyl-siloxane) (PDMS) blend membranes (PEBA : PDMS = 5 : 2, 6 : 1 wt%) were prepared through the solution-casting and phase inversion process in order to demonstrate their superior performance in carbon dioxide separation. PDMS and PEBA (4033) were also prepared by the same method using n-butanol as a solvent. To study the gas permeation properties, the membranes were characterized with SEM and tested with carbon dioxide and nitrogen at $35^{\circ}C$ and pressure ranging from 3 to 5 atm. In conclusion, PEBA/PDMS blend membranes were shown to have selectivity for $CO_2/N_2$ separation that is 4 to 5 magnitudes greater than that of PDMS membrane at 3 atm.

본 연구는 Poly(ether block amide) (PEBA)와 poly(dimethyl-siloxane) (PDMS)를 혼합한 블렌드막(PEBA: PDMS = 5 : 2,6 : 1 wt%)을 상전이법을 이용하여 제조하여, 이산화탄소의 분리능을 향상시키고자 하였다. PDMS와 PEBA (4033) 은 투과특성의 비교를 위해 각각 같은 방법의 단일막으로 제조되었고, 용매로는 n-butanol을 사용하였다. 제조된 막은 SEM 을 이용하여 morphology를 분석하였고, 압력에 따른 $CO_2$$N_2$의 투과도를 측정하였다. 실험결과, PEBA/PDMS 블렌드막은 3기압에서 단일 PDMS막에 비해 $N_2$에 대한 $CO_2$의 선택도가 $4{\sim}5$배 높은 것으로 나타났다.

Keywords

References

  1. B. I. Blume and I. Pinnau, 'Composite membrane, method of preparation and use', US Patent 4963165 (1990)
  2. J. H. Kim, S. Y. Ha, and Y. M. Lee, 'Gas permeation of poly(amide-6-b-ethylene oxide) copolymer,' J. Membr. Sci., 190, 179 (2001) https://doi.org/10.1016/S0376-7388(01)00444-6
  3. L. Liu, A. Chakma, and X. Feng, 'Preparation of hollow fiber PEBA/PSf composite membranes for separation of carbon dioxide from nitrogen', Chem. Eng. J., 105, 43 (2004) https://doi.org/10.1016/j.cej.2004.08.005
  4. C. K Yeom, J. M. Lee, Y. T. Hong, K. Y. Choi, and S. C. Kim, 'Analysis of permeation transients of pure gases through dense polumeric membranes measure by a new permeation apparatus', J. Membr. Sci., 166, 71 (2000) https://doi.org/10.1016/S0376-7388(99)00252-5