이온교환막의 균질/비균질 표면 형상에 따른 전기 와류 가시화 및 전기적 특성 분석
(주)코리아스칼라
- 최초 등록일
- 2023.04.03
- 최종 저작일
- 2023.01
- 8페이지/
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서지정보
ㆍ발행기관 : 한국재료학회
ㆍ수록지정보 : 한국재료학회지 / 33권 / 1호
ㆍ저자명 : 조명현, 최진웅, 김범주
목차
Abstract
1. 서 론
2. 이론 및 실험방법
2.1. 이론적 배경
2.2. 실험장치 제작
2.3. 실험 방법
3. 결과 및 고찰
3.1. 표면 형상 관찰
3.2. 유동 가시화
3.3. 전류-전압 특성 곡선
4. 결 론
Acknowledgement
References
영어 초록
The electromembrane process, which has advantages such as scalability, sustainability, and eco-friendliness, is used in renewable energy fields such as fuel cells and reverse electrodialysis power generation. Most of the research to visualize the internal flow in the electromembrane process has mainly been conducted on heterogeneous ion exchange membranes, because of the non-uniform swelling characteristics of the homogeneous membrane. In this study, we successfully visualize the electroconvective vortices near the Nafion homogeneous membrane in PDMS-based microfluidic devices. To reinforce the mechanical rigidity and minimize the non-uniform swelling characteristics of the homogeneous membrane, a newly developed swelling supporter was additionally adapted to the Nafion membrane. Thus, a clear image of electroconvective vortices near the Nafion membrane could be obtained and visualized. As a result, we observed that the heterogeneous membrane has relatively stronger electroconvective vortices compared to the Nafion homogeneous membranes. Regarding electrical response, the Nafion membrane has a higher limiting current and less overlimiting current compared to the heterogeneous membrane. Based on our visualization, it is assumed that the heterogeneous membrane has more activated electroconvective vortices, which lower electrical resistance in the overlimiting current regime. We anticipate that this work can contribute to the fundamental understanding of the ion transport characteristics depending on the homogeneity of ion exchange membranes.
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