The deformation and breakup behaviors of droplets containing polymer are investigated by high-speed photography to reveal the mechanism of electric field collapse when treating the emulsion containing polymer. The results show the electric field collapse process caused by droplet breakup consists of three steps. First, the droplet containing polymer ejects liquid filament under strong electric field. Second, the liquid filament is continuously stretched until it touches positive and negative electrodes. Finally, the severe Joule heating effect appears because the strong electric current flows through the liquid filament. The release of a large amount of heat causes the formation, expansion, and collapse of bubble, resulting in the fracture of liquid filament and the collapse of electric field. The increase of polymer concentration strengthens the Joule heating effect and enlarges the influence scope of bubble expansion and collapse. These findings provide significant guidance for the stable operation of electric dehydrator.

中文翻译：

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直流电场下含聚合物水滴的变形和破碎

通过高速摄影研究了含聚合物液滴的变形和破碎行为，以揭示处理含聚合物乳液时电场崩塌的机制。结果表明，由液滴破裂引起的电场坍塌过程包括三个步骤。首先，含有聚合物的液滴在强电场下喷射出液态细丝。其次，液态灯丝不断被拉伸，直到接触到正负极。最后，由于强电流流过液体灯丝，出现了严重的焦耳热效应。大量热量的释放导致气泡的形成、膨胀和塌陷，从而导致液丝断裂和电场塌陷。聚合物浓度的增加增强了焦耳热效应，扩大了气泡膨胀和破裂的影响范围。这些发现为电脱水机的稳定运行提供了重要的指导。