磁性流體在微流體晶片之混合與分離之研究

The Study on the Mixing and Separation of the Ferrofluid in Microfluidic Chips

張志偉(Chih-Wei Chang)

指導教授 ： 陳炳煇

國立臺灣大學/工學院/機械工程學研究所/博士(2006年)

https://doi.org/10.6342/NTU.2006.00693

摘要

無資料

關鍵字

磁性流體 ； 混合 ； 分離 ； 微流體晶片

並列摘要

The mixing and the separation of the ferrofluid in microfluidic chips were investigated in this thesis. Mixing processes of the ferrofluid in the presence of a permanent magnet (5mm*4mm*2mm, 1000 Gauss) are highly different from that of pure diffusion. The magnetic field re-distributes the ferrofluid and the mixing efficiencies vary with the positions of the magnet and the volumetric flow rates of the fluids. With the suitable setup of the magnet, the mixing efficiencies can reach more than 90% within one characterisitic width of the channel. The segmented flows are also studied by injecting two immiscible fluids (water and oil were used in the present study) into the microchannel, which can be applied for fluid control. The length of the segmented slugs can be controlled by modulating the flow rates of water and oil; the geometry of the microchannels also plays an important role during the formation of the slugs. The mixing and the separation were then combined on the PDMS microfluidic chips to perform a more complete function. By the suitable design of the microfluidic chips and the proper position of the magnet, mixing and separation of the ferrofluid in microfluidic chips can be performed in order.

並列關鍵字

ferrofluid ； mixing ； separation ； microfluidic chip

參考文獻

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