进料时间及表面活性剂对撞击流微反应器在粉体制备中的影响

The Influence of Feeding Time and Surface Active Agents on Impact Microreactor in Powder Preparation

摘要: 本文利用撞击流微反应器制备纳米硫酸钡，除考虑进料流量和表面活性剂对粉体制备的影响外，还应考虑进料时间以及表面活性剂的用量对粉体制备的影响。实验结果表明：在不同进料时间条件下所制得的硫酸钡晶体的粒度大小十分接近，进料时间的长短只能影响到产品的数量，而不能影响产品的质量。加入微量的六偏磷酸钠对粉体的粒度没有太大的影响。随着加入量的不断增加，制得的粉体的粒度明显减小。但当加入量达到一定程度时，继续增加表面活性剂的用量对实验结果的影响不大。

Abstract: This article uses an impact microreactor to prepare nanometer barium sulfate. In addition to considering the influence of feed rate and surface active agents on powder preparation, the influence of feeding time and surface active agent dosage on powder preparation should also be considered. The experimental results show that the particle size of barium sulfate crystals produced under different feeding time conditions is very close, and the length of feeding time can only affect the quantity of the product rather than its quality. The addition of trace amounts of sodium hexametaphosphate has little effect on the particle size of the powder. As the amount of addition continuously increases, the particle size of the powder produced obviously decreases. However, when the surface active agent dosage reaches a certain level, the further increase in dosage has little effect on the experimental results.