Development of an electroosmotic pump using nanosilica particle packed capillary
Development of an electroosmotic pump using nanosilica particle packed capillary
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DOI：
10.1109/jsen.2008.918726
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发表时间：
2008-05-01
影响因子：
4.3
通讯作者：
Choo, Jaebum
中科院分区：
文献类型：
--
作者：
Chen, Lingxin;Li, Qingling;Choo, Jaebum
高压电渗透泵（EOPs）的工作原理是在填充床毛细管上施加电场产生电渗透流（EOF）。本文描述了一种利用纳米二氧化硅颗粒设计的新型填充床EOP。填充床毛细管采用5 cm × 530 μ m直径的毛细管，与平均粒径为20-30 nm的二氧化硅颗粒紧密填充。仔细研究了泵的流量、压力和压力/流量（P - Q）特性、电性能以及磷酸盐缓冲液浓度对泵的影响。通过增加压力、降低施加电压和电流，无机缓冲液的热力学效率约为1% ~ 2%，有机溶剂或无离子溶剂混合物的热力学效率约为3% ~ 5%。
High-pressure electroosmotic pumps (EOPs) operate on the principle that electroosmotic flow (EOF) can be generated through a packed-bed capillary by applying an electric field through it. In this paper, a novel packed-bed EOP design using nanosilica particles is described. The packed-bed capillary was fabricated using a capillary of 5 cm x 530 mu m i.d. close packed with silica particles having an average particle size of 20-30 nm. The flow rates, pressures and pressure/flow rate (P - Q) characteristics, electric properties of the pump and the influence of phosphate buffer concentration on the pump were carefully studied. By increasing the pressure, decreasing the applied voltage, and the electric current, the thermodynamic efficiency was about 1%-2% for inorganic buffers and 3%-5% for organic solvents or their mixture without ions.