作　　者： ; ; ; ; ;

机构地区： 中国科学院广州能源研究所

出　　处： 《纳米技术与精密工程》 2012年第1期59-63,共5页

摘　　要： 介绍了一种基于毛细管流动聚焦方法制备微纳米量级气泡的流动聚焦微流控芯片.以水和空气为工质,在一定的压力和流量下,利用高速摄影技术研究微气泡的尺寸、发生频率和形成过程.分析了表面张力、气体压力、液体流量等参数对微气泡直径和发生频率的影响.实验结果表明,该微流控芯片可以稳定产生直径微米量级的微气泡,操作简单,在微反应器和生物、医药等领域有良好的应用前景. A flow focusing device for producing micro bubbles with the diameter of micro- and nano-meter was presented in this paper. In the experiment of water-air system, the size, generation frequency and for- mation process of micro bubbles were obtained from the pictures caught by a high-speed camera under the certain pressure and flow. The influences of surface tension, pressure and flow rate on the size of micro bubbles and generation frequency were studied. Experimental results show that the device can produce continuous micro bubbles of certain diameters and it is convenient to control. Thus it can be used in mi- cro reactors and biological and pharmaceutical fields.

关 键 词： 流动聚焦 微通道 微气泡 流型

领　　域： [理学] [理学]