Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Preparation and Electrochemical Applications of Pore-filled Ion-exchange Membranes with Well-adjusted Cross-linking Degrees: Part II. Reverse Electrodialysis

가교도가 조절된 세공충진 이온교환막의 제조 및 전기화학적 응용: Part II. 역 전기투석

  • Song, Hyun-Bee (Department of Green Chemical Engineering, Sangmyung University) ;
  • Moon, Ha-Neul (Department of Green Chemical Engineering, Sangmyung University) ;
  • Kim, Do-Hyeong (Department of Green Chemical Engineering, Sangmyung University) ;
  • Kang, Moon-Sung (Department of Green Chemical Engineering, Sangmyung University)
  • 송현비 (상명대학교 그린화학공학과) ;
  • 문하늘 (상명대학교 그린화학공학과) ;
  • 김도형 (상명대학교 그린화학공학과) ;
  • 강문성 (상명대학교 그린화학공학과)
  • Received : 2017.10.25
  • Accepted : 2017.10.27
  • Published : 2017.10.31
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Abstract

In this study, the effects of membrane characteristics on the power generation performance in reverse electrodialysis (RED) have been investigated with pore-filled ion-exchange membranes (PFIEMs) prepared by employing a porous polyethylene substrate and the mixtures of three cross-linking agents. As a result, it was confirmed through the correlation analyses that the cross-linking degree and free volume of the PFIEMs were effectively controlled by mixing the cross-linking agents having different molecular sizes, influencing complexly the electrochemical characteristics of the membranes and the power generation performance in RED. In particular, the pore-filled cation-exchange membranes at the optimum cross-linking conditions exhibited the power generation performance superior to that of the commercial membranes and the pore-filled anion-exchange membranes also showed the excellent performance close to that of the commercial membrane.

본 연구에서는 다공성 폴리에틸렌 지지체를 기반으로 세 가지 가교제를 혼합 도입한 세공충진 이온교환막을 제조하고 역 전기투석에서 멤브레인의 특성이 발전성능에 미치는 영향을 고찰하였다. 실험 결과, 분자 크기가 다른 가교제를 혼합함으로써 이온교환막의 가교도 및 자유체적이 효과적으로 조절됨을 확인하였으며 상관 분석을 통해 멤브레인의 전기화학적 특성 및 이를 적용한 역 전기투석의 발전성능에 복합적인 영향을 미침을 알 수 있었다. 특히 세공충진 양이온 교환막은 최적 가교조건에서 상용막 대비 동등 이상의 발전 성능을 나타내었으며 음이온 교환막 또한 상용막에 근접하는 우수한 성능을 나타내었다.

Keywords

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