超高速旋转填充床连续可控制备乳液研究

首次提出采用超高速旋转填充床对分散相单独做功连续制备乳液，考察了操作参数和填料规格对乳液粒径和粒径分布的影响规律。研究发现上述操作条件对乳液分散相的粒径和粒径分布具有显著影响，并获得了较优操作条件：转速9 000 r/min，乳化剂质量分数4.2%，油相流量15 L/h，填料类型为3D打印填料；在该条件下制备出平均液滴粒径约为12 μm的乳液。建立了用于预测分散相粒径的数学模型。所得结果为连续、可控、低成本制备乳液提供了一条新途径。

Continuous emulsification in an ultra-high-speed rotating packed bed

The performance of an emulsion is determined by the average particle size and size distribution of the dispersed phase. Developing new methods for the continuous and controlled preparation of emulsions is of considerable interest. Industrial emulsification processes usually involve mixing the dispersed phase and continuous phase in an intermittent manner, which results in high energy consumption and unstable properties of the product. In this work, an ultra-high-speed rotating packed bed (UHS-RPB) has been used for the first time to prepare an emulsion continuously. The influence of the operating parameters and packing specifications on the particle size and size distribution in the emulsion has been investigated. It was found that the above operating conditions had a significant effect on the particle size and particle size distribution of the dispersed phase. An emulsion with an average droplet size of 12 μm was obtained under the optimal operating conditions of rotational speed of 9 000 r/min, emulsifier concentration of 4.2%, oil flow rate of 15 L/h, and 3D printing packing in a UHS-RPB. A mathematical model for predicting the particle size of the dispersed phase was established. This study provides a new route for the continuous, controllable and low cost preparation of emulsions.