Hexagonal polymer plates of (sub)millimeter size that were uniform in shape and size were used as a stabilizer for emulsions, and the correlations of plate size, oil polarity, and plate dispersing media before emulsification with the formability, type, and droplet shape of emulsions were studied. The formability of the emulsions was improved by decreasing the plate size. The lower the oil polarity was, the more preferably O/W-type emulsions were formed, and as the oil polarity increased, the formability of W/O-type emulsions increased, whereas too high of an oil polarity resulted in no emulsion formation or macrophase separation of the oil dispersion of the plates and water. Furthermore, when the plate dispersing medium before emulsification was oil, the plates tended to be lipophilic compared with those dispersed in water before emulsification. In addition, we confirmed that there was a correlation between the droplet/stabilizer size ratio and droplet shape: when the droplet/plate size ratios are >2, droplets with near-spherical shapes are formed; when the size ratios are between 1 and 2, droplets with polyhedral shapes (e.g., hexahedral and tetrahedral shapes) are formed; and when the size ratios are <1, sandwich-shaped droplets are formed. Droplets with similar structures tended to form if the droplet/plate size ratios were close, even though the sizes of the plate and droplet were different.

中文翻译：

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用毫米级聚合物板稳定的 Pickering 乳液


以形状和尺寸均匀的（亚）毫米级聚合物板作为乳液的稳定剂，研究了乳化前板尺寸、油极性和板分散介质与乳液的成型性、类型和液滴形状的相关性。通过减小板材尺寸，乳液的成型性得到改善。油极性越低，形成 O/W 型乳液就越优选，并且随着油极性的增加，W/O 型乳液的可形成性增加，而油极性过高会导致没有乳液形成或板与水的油分散体的宏观分离。此外，当乳化前的板分散介质为油时，与乳化前分散在水中的板相比，板往往具有亲脂性。此外，我们证实了液滴/稳定剂尺寸比与液滴形状之间存在相关性：当液滴/平板尺寸比为 >2 时，会形成近球形的液滴;当粒径比在 1 到 2 之间时，形成多面体形状（例如，六面体和四面体形状）的液滴;当粒径比为 <1 时，形成夹心状液滴。如果液滴/板尺寸比接近，即使板和液滴的尺寸不同，也往往会形成具有相似结构的液滴。