小型低压电渗输液泵的研究  

A Small Low-Pressure Electroosmotic Pump

作　　者：谭峰[1] 杨丙成[1] 关亚风[1] 

机构地区：[1]中国科学院大连化学物理研究所,大连116023

出　　处：《分析化学》2006年第2期280-282,共3页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金杰出青年基金(No.29925514);国家自然科学基金仪器专项(No.20227501)资助

摘　　要：设计了一种小型低压电渗泵。该泵主要由直流电源、填充电渗柱、铂电极和压力传感器等构成。电渗柱的内部尺寸为币6×12mm，柱内填充45μm的多孔硅胶。工作时，泵头直接浸入被输送的液体中进行输液。研究了电压和电流对输出压强和流量的影响：压强和电压及电流均成良好的线性；而在250V以上，流量增加变快，明显偏离线性。对去离子水和0．5mmol／L的KCl溶液，该泵可产生0～1．6atm的输出压力和每分钟几μL至几百μL的输出流量。该泵结构简单，可以不问断输液一星期以上，能用于微流控分析、流动注射分析及微反应输液等领域。A small low-pressure electroosmotic flow （EOF） pump capable of generating pressure of 1.6 atm with flow rates on the order of several hundred μL/min has been designed and evaluated. The pump consisted of direct current （DC） power supply, nylon column packed with porous silica particles, platinum wire electrode and pressure transducer. The packed electroosmotic pump （EOP） column is nylon tube which has dimension of φ 6 × 12 mm and packed with 45 μm silica particles. The effect of driven voltage and current on pressure and flow rate of the pump was studied. Results showed both pressure and flow rate linearly increased with the voltage and current; however, the curve deviated the linear near to flow rate-axis when the voltage was over 300 V. Deionized water and 0.5 mmol/L KCl solution were used as a working fluid in order to study the effect of driven voltage and current on output pressure and flow rate. In this EOF pump, the gas produced in electrode chamber and electroosmotic column was instantly removed and then the pump can continuously work over one week. The pump may be applied in micro total analysis system, flow injection analysis and delivery liquid in micro-reaction, and so on.

关 键 词：电渗流 电渗泵 输液 

分 类 号：TH38[机械工程—机械制造及自动化]