The aim of this study was to investigate the production characteristics of large soybean oil droplets dispersed in an aqueous solution containing an emulsifier using newly designed microchannel emulsification (MCE) chips. The silicon MCE chips consisted of numerous asymmetric through holes with a characteristic cross-sectional size of 20 μm to 50 μm, each consisting of a microslot and a circular microchannel (MC). MCE using such chips enabled the stable production of uniform large droplets with average diameters of 75 μm and 179 μm respectively, and a coefficient of variation below 2%. The detachment behavior of the large droplets generated from the asymmetric through holes was analyzed and discussed based on results obtained by real-time optical microscopy. The size of droplets smaller than 100 μm was independent of the flow rate of the cross-flowing continuous phase (Q_c) applied in this study. In contrast, the size of droplets larger than 100 μm became sensitive to Q_c in its range over a critical value. Large droplets with a very narrow size distribution were obtained at dispersed phase fluxes (Jd) of 50 L m~(-2) h~(-1) or less, whereas their average diameters were somewhat dependent on Jd.
展开▼
机译：本研究的目的是研究分散在含有乳化剂的水溶液中的大豆油液滴的生产特性，使用新设计的微通道乳化（MCE）芯片。硅MCE芯片由许多不对称的通孔组成，具有20μm至50μm的特征横截面尺寸，每个横截面尺寸为微卷和圆形微通道（MC）。使用这种芯片的MCE使得平均直径分别为75μm和179μm的平均直径的均匀大液滴的稳定生产，并且变异系数低于2％。基于通过实时光学显微镜获得的结果分析和讨论从非对称通孔产生的大液滴的分离行为。小于100μm的液滴的尺寸与本研究中应用的交叉流动连续相（Q_c）的流速无关。相反，大于100μm的液滴的大小在其范围内对Q_C敏感到临界值。在50 L M〜（-2）H〜（-1）或更少分散相通量（JD）方法，得到了一个非常窄的粒度分布大的液滴，而它们的平均直径为一定程度上取决于JD。
展开▼
