The electroconvection generated on the surface of an ion exchange membrane (IEM) is closely related to the electrical/ chemical characteristics or topology of the IEM. In particular, when non-conductive regions are mixed on the surface of the IEM, it can have a great influence on the transfer of ions and the formation of nonlinear electroconvective vortices, so more theoretical and experimental studies are necessary. Here, we present a novel method for creating microscale non-conductive patterns on the IEM surface by laser ablation, and successfully visualize microscale vortices on the surface modified IEM. Microscale (~300 μm) patterns were fabricated by applying UV nanosecond laser processing to the non-conductive film, and were transferred to the surface of the IEM. In addition, UV nanosecond laser process parameters were investigated for obvious micro-pattern production, and operating conditions were optimized, such as minimizing the heat-affected zone. Through this study, we found that non-conductive patterns on the IEM surface could affect the generation and growth of electroconvective vortices. The experimental results provided in our study are expected to be a good reference for research related to the surface modification of IEMs, and are expected to be helpful for new engineering applications of electroconvective vortices using a non-conductive patterned IEM.

Abstract
1. 서 론
2. 이론 및 실험방법
    2.1. 이론적 배경
    2.2. 비전도성 패턴 이온교환막 제작
    2.3. 실험 방법
3. 결과 및 고찰
    3.1. 유동 가시화(without shear flow)
    3.2. 유동 가시화(with shear flow)
4. 결 론
Acknowledgement
References

• 최진웅(공주대학교 미래융합공학과) | Jinwoong Choi (Department of Future Convergence Engineering, Kongju National University)
• 조명현(공주대학교 미래융합공학과) | Myeonghyeon Cho (Department of Future Convergence Engineering, Kongju National University)
• 김범주(공주대학교 미래융합공학과, 공주대학교 기계자동차공학부) | Bumjoo Kim (Department of Future Convergence Engineering, Kongju National University, Department of Mechanical & Automotive Engineering, Kongju National University) Corresponding author