Study on CO2/N2 Mixture Gas Permeation Behavior through Polyethersulfone Membrane Treated by Plasma

플라즈마 처리된 폴리이써설폰 막의 CO2/N2 혼합가스의 투과거동에 대한 연구

  • Park, Hee-Jin (Department of Chemical Engineering, College of Engineering Science, Hanyang University) ;
  • Noh, Sang-Ho (Department of Chemical Engineering, College of Engineering Science, Hanyang University) ;
  • Bae, Seong-Youl (Department of Chemical Engineering, College of Engineering Science, Hanyang University) ;
  • Moon, Sei-Ki (Department of Chemical Engineering, College of Engineering Science, Hanyang University)
  • 박희진 (한양대학교 공과대학 화학공학과) ;
  • 노상호 (한양대학교 공과대학 화학공학과) ;
  • 배성렬 (한양대학교 공과대학 화학공학과) ;
  • 문세기 (한양대학교 공과대학 화학공학과)
  • Received : 2002.02.05
  • Accepted : 2002.09.04
  • Published : 2002.12.01

Abstract

The surface of polyethersulfone(PES) membrane treated by Ar, $NH_3$ plasma, and the effects were observed before and after the treatment. The membrane treated by Ar plasma was increased the O/C ratio and measured the hydrophilic group, and the one by $NH_3$ plasma was attached the amine group and the amino group. In addition, with the wettability of polyethersulfone membrane $CO_2$ and the polar functional groups of surface interacted increasingly. Thus by comparable increase of the soluble selectivity $CO_2$ to $N_2$ both the permeability and the selectivity of $CO_2$ was improved. The optimum condition for the $CO_2$ permeation and actual separation factor of the plasma treated membrane was as follows; the measurement of Ar-10 W-2 min plasma treatment was $13.19{\times}10^{-10}cm^3(STP)cm/cm^2{\cdot}s{\cdot}cmHg$ and 20.12, and the measurement of $NH_3$-50 W-2 min plasma treatment was $15.40{\times}10^{-10}cm^3(STP)cm/cm^2{\cdot}s{\cdot}cmHg$ and 20.06.

폴리이써설폰 막(polyethersulfone membrane, PES)을 Ar, $NH_3$ 플라즈마로 표면 처리하고, 처리 전후의 변화를 관찰하였다. Ar 플라즈마로 처리하였을 때 O/C의 비율이 증가하며 친수성기의 도입이 확인되었고 $NH_3$ 플라즈마로 처리하였을 때 아민, 아미노기가 도입되었다. 또한 폴리이써설폰 막의 흡습성이 유지될 경우, 플라즈마 처리에 의해 표면에 형성된 극성 작용기들과 $CO_2$와의 내부반응이 증가하였다. 이로 인해 $N_2$에 비하여 $CO_2$의 용해 선택성이 증가하였고 투과도와 선택도가 동시에 향상되는 효과를 나타내었다. 플라즈마 처리된 폴리이써설폰 막에서 $CO_2$의 투과도와 ${\gamma}$(actual separation factor)에 대한 최적조건은 Ar 플라즈마 처리의 경우 10 W-2 min에서 각각 $13.19{\times}10^{-10}cm^3(STP)cm/cm^2{\cdot}s{\cdot}cmHg$와 20.12이며, $NH_3$ 플라즈마 처리의 경우 50 W-2 min에서 $15.40{\times}10^{-10}cm^3(STP)cm/cm^2{\cdot}s{\cdot}cmHg$와 20.06를 얻었다.

Keywords

References

  1. Membrane Separation Gas Separation
  2. Chemistry Letters Yoshikawa, M;Fujimoto, K;Kinugawa, H;Kitao, T;Ogata, N
  3. Journal of Polymer Science Part A Polymer Chemistry v.33 no.12 Surface modification of aromatic polyamide film by oxygen plasma Inagaki, N;Tasaka, S;Kawai, H https://doi.org/10.1002/pola.1995.080331207
  4. Polymer v.38 no.7 Adhesion properties of oxygen plasma-treated polypropylene-based copolymers Nihlstrand, A;Hjerberg, T;Johansson, K https://doi.org/10.1016/S0032-3861(96)00667-2
  5. Cold Plasma in Materials Fabrication Grill;Alfred
  6. Journal of Membrane Science v.125 no.2 Plasma fluorination of organosilicon polymeric films for gas separation applications Borisov, S;Khotimsky, V. S;Rebrov, A. I;Rykov, S. V;Slovetsk, D. I;Pashunin, Y. M https://doi.org/10.1016/S0376-7388(96)00254-2
  7. Journal of Membrane Science v.55 no.1-2 Kawagami, M;Yamashita, Y;Iwamoto, M;Kagawa, S https://doi.org/10.1016/S0376-7388(00)82331-5
  8. Membrane Journal v.11 Noh, S. H;Rew, D. S;Park, H. J;Bae, S. Y
  9. Journal of Macromolecular Science Part A v.10 no.3 Yasuda, H https://doi.org/10.1080/00222337608061190