멤브레인 (Membrane Journal)

  • 제30권6호
  • /
  • Pages.385-394
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  • 2020
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  • 1226-0088(pISSN)
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  • 2288-7253(eISSN)
한국막학회 (The Membrane Society of Korea)
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가소화 저항 향상을 위한 기체분리막 소재 개발 동향

Review on Membrane Materials to Improve Plasticization Resistance for Gas Separations

  • 조진희 (전남대학교 고분자융합소재공학부) ;
  • 지원석 (전남대학교 고분자융합소재공학부)
  • Jo, Jin Hui (School of Polymer Science and Engineering, Chonnam National University) ;
  • Chi, Won Seok (School of Polymer Science and Engineering, Chonnam National University)
  • 투고 : 2020.11.25
  • 심사 : 2020.12.20
  • 발행 : 2020.12.31
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⟨ 이전 논문 다음 논문 ⟩

초록

기체분리공정에서 사용되는 분리막은 높은 기체 투과 및 분리성능과 고온·고압 조건에서 높은 안정성을 보여야 한다. 하지만 고분자분리막(특히, 유리상 고분자)은 응축 가능한 기체 분자(예를 들어, CO2, H2S, hydrocarbon 등)에 노출되면 고분자 사슬이 부풀어 오르는 가소화 현상을 보여 안정성 측면에서 한계를 보인다. 이러한 가소화 현상은 고압의 복합기체 분리공정에서 선택도를 감소시켜 장기적으로는 고분자분리막이 분리공정에 도입될 수 없는 문제를 가져온다. 이러한 가소화 현상 문제를 해결하기 위해서 분리막 연구자들은 분리막 열처리, 고분자 혼합, 고분자구조의 열적 재배열, 혼합매질분리막 제작, 가교화 방법 등을 통하여 분리막의 가소화 저항을 향상시켰다. 본 총설에서는 고분자 분리막의 가소화 저항의 개념 및 현상에 대해서 알아보고 이를 해결할 수 있는 인자들과 그와 연관된 연구들을 살펴보도록 할 것이다.

In the gas separation process, the separation membranes have to not only show high gas transport and selectivity but also exhibit exceptional stability at high temperature and pressure. However, when the polymeric membranes (particularly, glassy polymers) are exposed to the condensable gases (i.e., CO2, H2S, hydrocarbon, etc.), the polymer chains are prone to swell, leading to low stability. As a result, the plasticization behavior reduces the gas selectivity in the separation of mixture gases at high pressures and thus results in limited applications to the separation processes. To address these issues, many strategies have been studied such as thermal treatment, polymer blending, thermally rearrangement, mixed-matrix membranes, cross-linking, etc. In this review, we will understand the plasticization behavior and suggest potential methods based on the previously reported studies.

키워드

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