微流道中磁性流體之毛細充填

Capillary Filling of Ferrofluid in Homogeneous Hydrophilic PDMS Microchannels

楊博智(Bo-Zhi Yang)

指導教授 ： 郭如男

國立虎尾科技大學/工程學院/自動化工程研究所/碩士(2013年)

https://doi.org/10.6827/NFU.2013.00153

摘要

本研究是使用聚二甲基矽氧烷(PDMS)材質的微流道來進行磁性流體之毛細充填速度實驗，探討磁場與溫度對於磁性流體毛細充填的影響。本研究使用黃光微影製程與氧電漿接合技術，製作出深度100 μm，寬度100~400 μm的微米流道，利用不同濃度的磁性流體來進行毛細充填實驗，並與DI water來做比較，結果發現，實驗所得的磁性流體充填速度明顯低於DI water。本研究結果顯示，當流道寬度較窄和充填較低溫的磁性流體時，磁性流體的充填速度會比充填流道寬度較寬與高溫的磁性流體來的低。此外，充填的長度增加也會降低磁性流體的充填速度，但是在充填磁性流體中結合強力磁鐵下能夠提高充填的速度，當流體越靠近強力磁鐵時，充填速度的提升更為明顯 。

關鍵字

微流道 ； 磁性流體 ； 毛細充填 ； 聚二甲基矽氧烷(PDMS)

並列摘要

The capillary filling speed of ferrofluid combine with magnetic and temperature effects in hydrophilic polydimethylsiloxane (PDMS) microfluidic channels is investigated. Microchannels with depth of 100 μm and widths ranging from 100 to 400 μm are fabricated using conventional photolithography techniques and oxygen plasma bonding process. The capillary filling speed of ferrofluid is measured experimentally and compared with the DI water. It is found that the obtained experimental capillary filling speed of ferrofluid are significantly lower than DI water. The experimental results show that capillary filling speed of ferrofluid reduces with a narrow channel width, an increasing ferrofluid concentration, and a lower operation temperature. Furthermore, the filling speeds of ferrofluid reduces with an increasing filling length, but combine with magnetic effect the filling speed is increased and the more near the magnet is the more obviously.

並列關鍵字

Capillary filling ； Ferrofluid ； Microchannels ； PDMS

參考文獻

[29]陳冠宇，“微流道毛細填充流動之理論與實驗研究”，淡江大學機械與機電工程系，碩士論文，2007。

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