Measurements of Polymer Motions in Microchannel Viscoelastic Fluid Flows using Fluorescent Labeling Method

2014 Fiscal Year Final Research Report

• Project/Area Number: 25630066
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Thermal engineering
• Research Institution: Kyoto University
• Principal Investigator: TATSUMI Kazuya 京都大学, 工学(系)研究科(研究院), 准教授 (90372854)
• Co-Investigator(Renkei-kenkyūsha): NAKABE Kazuyoshi 京都大学, 大学院工学研究科, 教授 (80164268)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 高分子計測 / 粘弾性流体流れ / 蛍光標識 / 誘電分光 / マイクロ流路 / 分子量計測 / 濃度計測

Outline of Final Research Achievements

Fluorescent marking of polymers solved in fluids was conducted to evaluate the polymer conditions in fluids such as molecular weight, concentration and orientation. Further, to measure the same polymer characteristics, dielectrophoretic spectroscopy of the polymer solution was performed using parallel plate type electrodes designed for stationary fluids and micro-electrodes attached to the top and bottom walls of the microchannel. In the fluorescent labeling case, the single polymer molecule was visualized reasonably, however, there was some difficulties in measuring their distributions in fluid flows. We are now trying to apply HPam to solve this problem. On the other hand, the polymer characteristics could be measured based on the frequency the dielectric relaxation occurs. Still, measurement in microchannel flows incurs noticeable noise and we our now improving the experimental apparatus.

Free Research Field

伝熱工学