用于聚合物微流控装置中流量操纵的磁控柔性阀

Madhushree Bute, A. Sheikh, V. Mathe, D. Bodas, R. N. Karekar, S. Gosavi
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引用次数: 3

摘要

本文介绍了一种用于微流控网络中流量控制的简单磁致柔性聚合物阀的设计和制造。该阀门由聚合物复合材料制成。将CoFe2O4包埋在聚二甲基硅氧烷(PDMS)中制备该聚合物复合材料。采用不同体积百分比CoFe2O4负载的复合材料,为每个浓度阀制作不同厚度的矩形薄膜。该膜沿厚度方向磁化,表现出典型的永磁体特性。为了驱动阀门,膜受到外部施加的磁力的偏转,可以关闭任何一个通道。阀门的流量控制和正确操作取决于膜中磁性物质的厚度和百分比,以及通道、腔室和膜的尺寸与出口通道的位置有关。在任何流体流速下,微流体通道都是完全封闭的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Magnetically controlled flexible valve for flow manipulation in polymer microfluidic devices
The paper describes design and fabrication of simple, magnetically actuated flexible polymer valve for flow manipulation in the microfluidic network. The valve is made up of a polymer composite. The CoFe2O4 was embedded in PDMS (Polydimethylsiloxane) for making this polymer composite. The composites of different volume percentage loading of CoFe2O4 were used and for each concentration valves of different thicknesses were fabricated, as thin rectangular membranes. This membrane was magnetized in the thickness direction and showed typical permanent magnet behaviour. For actuation of the valve the membrane was deflected by externally applied magnetic force which can close either of the channels. The flow manipulation and proper operation of the valve depends on thickness and percentage loading of magnetic material in membrane as well as dimensions of channel, chamber and membrane with respect to the location of outlet channels. The microfluidic channel was completely close for any fluid flow rate.
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