Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Gas Permeation Properties of PTMSP-ZIF Composite Membrane

PTMSP-ZIF 복합막의 기체투과 특성

  • Received : 2015.03.20
  • Accepted : 2015.06.30
  • Published : 2015.08.10
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Abstract

PTMSP-ZIF composite membranes were prepared by the addition of zeolitic imidazolate framework (ZIF-8) into poly (1-trimethylsilyl-1-propyne) (PTMSP) having high gas permeability to improve trade-off relationship of the polymer membrane. PTMSP-ZIF composite membranes were prepared with different amounts of ZIF-8; 0, 5, 10, 20, 30 and 40 wt%. Gas permeation properties for $H_2$, $N_2$, $CO_2$, and $CH_4$ were investigated by increasing the amount of ZIF-8 in the PTMSP. The gas permeability of PTMSP-ZIF composite membranes within 5~30 wt% of ZIF-8 contents increased as ZIF-8 contents went up and decreased thereafter. The gas permeability for $CO_2$ showed the maximum value of 76080 barrer at 30 wt% of ZIF-8 content and PTMSP-ZIF composite membrane containing 20 wt% of ZIF-8 content had the highest selectivity ($CO_2/N_2$) with the value of 8.2. The selectivity ($H_2/N_2$) and selectivity ($CO_2/CH_4$) were almost the same as PTMSP in the range 10~40 wt% of the ZIF-8. Overall, PTMSP-ZIF composite membranes resulted in maintained selectivity and increased permeability compared to those of PTMSP membranes.

기체 투과도가 우수한 PTMSP [Poly(1-trimethylsilyl-1-propyne)] 고분자막의 양립현상(trade-off relationship)을 개선하기 위해서 ZIF-8 (zeolitic imidazolate framework)을 첨가하여 PTMSP-ZIF 복합막을 제조하였다. PTMSP-ZIF 복합막은 PTMSP에 ZIF-8의 함량을 0, 5, 10, 20, 30, 40 wt%로 하여 제조하였고, PTMSP-ZIF 복합막의 ZIF-8 함량 변화에 따른 $H_2$, $N_2$, $CO_2$, $CH_4$의 기체투과 특성을 알아보았다. 기체투과 실험에서 ZIF-8의 함량 5~30 wt%까지는 ZIF 함량이 증가함에 따라 기체투과도는 증가하였고, 그 이후에는 감소하였다. PTMSP-ZIF 30 wt% 복합막에서 $CO_2$의 기체투과도가 76080 barrer로 가장 큰 기체투과도를 보였고, PTMSP-ZIF 20 wt% 복합막에서 선택도($CO_2/N_2$)는 8.2로 가장 높은 값을 보였다. 선택도($H_2/N_2$)와 선택도($CO_2/CH_4$)는 ZIF-8 함량 10~40 wt% 범위에서 PTMSP 단일막과 거의 비슷한 값을 보였다. 전체적으로 PTMSP-ZIF 복합막들은 PTMSP 단일막보다 선택도는 감소되지 않으면서 투과도는 향상된 결과를 보였다.

Keywords

References

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