聚结(物理)
电场
乳状液
机械
材料科学
皮克林乳液
经典力学
物理
光学
化学物理
纳米技术
化学工程
量子力学
工程类
天体生物学
作者
Guo Chen,Peng Tan,Shuyu Chen,Jiping Huang,Weijia Wen,Lei Xu
标识
DOI:10.1103/physrevlett.110.064502
摘要
Combining high-speed photography with electric current measurement, we investigate the electrocoalescence of Pickering emulsion droplets. Under a high enough electric field, the originally stable droplets coalesce via two distinct approaches: normal coalescence and abnormal coalescence. In the normal coalescence, a liquid bridge grows continuously and merges two droplets together, similar to the classical picture. In the abnormal coalescence, however, the bridge fails to grow indefinitely; instead, it breaks up spontaneously due to the geometric constraint from particle shells. Such connecting-then-breaking cycles repeat multiple times, until a stable connection is established. In depth analysis indicates that the defect size in particle shells determines the exact merging behaviors: when the defect size is larger than a critical size around the particle diameter, normal coalescence will show up, while abnormal coalescence will appear for coatings with smaller defects.
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