Abstract:

A new method of micro-chemical reaction was proposed on the basis of the digitalization of micro-fluids technology, which brings a small controllable pulse inertial force to the micro-nozzle. By using this method, the micro-fluids could be digitally transported and injected as a string of micro-drops, and then the micro-chemical reaction proceeded in the mixed domain by collision and polymerization. During the micro-chemical reaction, one micro-droplet could be injected with one driving pulse. The droplets not only could be injected continuously, but also could be injected according to the codes , therefore the micro-chemical reaction could be controlled effectively. The speed and time of the micro-chemical reaction were adjusted by changing the diameter of micro-pipette and driving frequency. By using the precision glass fabrication technology, the micro-reactor had neither inner moving parts nor embedded microcircuit. It had simple structure, low cost, smooth circular cross-section glass channel and could be driven easily. The synthesis experiment of metal porphyrin was made, and the result showed that the micro-reactor could reduce reaction time and reaction temperature was lower than conventional reaction.

Key words:

微反应器, 微喷射, 微流体数字化, 荧光材料

摘要：

提出一种新的基于微流体数字化技术的微化学反应方法，该方法通过对微喷嘴施加小幅可控的脉冲惯性力，对参加反应的微流体进行数字化传输和喷射生成微液滴，进而在混合腔内碰撞聚合实现溶液间的微反应。微反应过程中，每个驱动脉冲喷射出一颗微液滴，反应的节拍既可是连续的也可是编码的，因而可对微反应过程实施有效控制。通过改变微喷嘴内径和驱动频率，可调整微反应的速度和时间。微反应器采用玻璃精细加工技术制造，内部既无可动件又无内嵌式微电路，结构简单、制造成本低，圆截面玻璃微流道光滑流畅，易于驱动。进行了金属卟啉荧光材料的合成实验，结果表明，数字化微反应器可大大缩短反应时间，降低反应温度。

关键词:

微反应器, 微喷射, 微流体数字化, 荧光材料