报告题目：High Output Power Micropump by Electro-Conjugate Fluid and its Applications
报告人：Dr. Joon-wan KIM
时间：11月15日(星期五) 14:00 – 16:00
地点：浙江大学玉泉校区液压老楼四楼会议室
交流内容及邀请专家人介绍：
High Output Power Micropump by Electro-Conjugate Fluid and its Applications
Abstract:
In order to realize micro motion control systems for high output power-needed tasks, fluid-powered microactuators are considered as promising candidates due to scaling laws. However, nobody has ever developed such a microactuator that satisfies both high output power and miniaturization at the same time, because of difficulties in fabricating powerful micropumps. Even if over 200 archival journal papers have been published, there are no micropumps that have sufficient output power density and can be employed as power sources in micro hydraulic systems. In order to develop the powerful micropumps, we focus on electro-conjugate fluid (hereafter ECF) effect as a promising driving mechanism. ECF is a kind of dielectric and functional fluid, which generates a powerful jet, called the ECF jet, when electrodes inserted into it are subjected to DC voltages. In the ECF effect, electric energy is converted directly to kinetic energy of the ECF. Triangular prism and slit electrode (TPSE) pairs were proposed and developed as electrode structures for the strong ECF jets, because TPSE pairs have their great merits of combining relatively high performance with easy fabrication by a micro electro mechanical system (MEMS) technology. Thanks to the MEMS-fabricated TPSE pairs, ECF micropumps having world-highest power density were successfully realized. The ECF micropumps as micro hydraulic power source have led to the breakthroughs in various applications, such as micro cooling systems for microelectronic devices, micro fingers & their hands, focus-tunable microlens, micro rate gyroscope, and so on. This presentation introduces the following to peoples in Zhejiang University: (1) ECF; (2) MEMS; (3) ECF micropumps as micro hydraulic power sources; and (4) various applications based on the ECF micropumps.
Biography:
Ph.D. Joon-wan KIM is an Associate Professor at Secure Device Research Center of Precision and Intelligence Laboratory in Tokyo Institute of Technology.
He was born in Seoul, Korea and received B.S. in the department of Mechanical Engineering, POSTECH (Pohang University of Science and Technology) in 1999. He was screened and selected as a Japanese Government Scholarship student by Japanese Embassy and joined in the department of Precision Machinery Engineering, the University of Tokyo in 1999. He received M.S. awarded as honor researches in 2002 and gained his Ph.D. at the same department in 2005. From 2002 to 2005, he was also a Junior Research Associate at Materials Fabrication Laboratory, RIKEN, which is Japan’s largest and most comprehensive research organization for basic and applied science. His Ph.D. thesis is “A Study on Micro Patterning Method Using Electrically Controlled Nano-particle Deposition”, which is the interdisciplinary research of mechatronics, biochemistry, and MEMS technology. From April in 2005 to May in 2013, he was an assistant professor and worked with Prof. Shinichi YOKOTA concerning microactuators using Electro-Conjugate Fluid (ECF) at Precision and Intelligence Laboratory in Tokyo Institute of Technology, where he is currently an associate professor. He is also an associate professor in the department of Mechano-Micro Engineering, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology. His current interests are micro & bio mechantronics, microactuators using functional fluids, and MEMS fabrication technology.