The objective of this work is to establish an experimental approach to scale-up the production of melamine formaldehyde (MF) microcapsules from a batch lab-scale to a pilot-scale inline rotor stator mixer (RSM). The inline RSM is operated in a continuous recycle mode, allowing multiple passes of the emulsion through the intensive mixing zone during continuous production. The liquid is continuously recirculated directly to the RSM, without a holding vessel, as is the case in conventional batch recirculation emulsification. The setup is operated at feed flow rates of 0.24 kg/h - 20 kg/h. Parameters including the Weber number, tip speed and energy density are investigated to correlate the mean capsule size of the batch and flow process. Rotational speeds range from 3000 to 26,000 rpm. The dimensionless maximum diameter correlated well with the Weber number to the power -0.4, for both devices operated at the same residence time. Volume and number based mean diameters showed little influence of the feed flow rate in the continuous recycle mode of operation. This inline RSM setup is therefore an ideal tool to optimize emulsification processes at lab scale and increase production by increasing the feed flow rate, while maintaining rotor-stator geometry.

这项工作的目的是建立一种实验方法，以将三聚氰胺甲醛（MF）微胶囊的生产规模从批处理实验室规模扩大到中试规模在线转子定子混合器（RSM）。在线RSM以连续循环模式运行，在连续生产过程中允许乳液多次通过强力混合区。就像传统的间歇式循环乳化一样，液体无需保留容器即可连续直接循环回RSM。该装置的进料流速为0.24 kg / h-20 kg / h。研究了包括韦伯数，叶尖速度和能量密度在内的参数，以关联批料和流动过程的平均胶囊尺寸。转速范围为3000至26,000 rpm。对于在相同停留时间下运行的两个设备，无因次最大直径与韦伯数与功率-0.4很好地相关。在连续循环操作模式下，基于体积和数量的平均直径对进料流速的影响很小。因此，这种在线RSM设置是理想的工具，可在实验室规模优化乳化过程并通过增加进料流速提高产量，同时保持转子定子的几何形状。