Abstract In this study, we shed light on the coupling between voltage (V) and tip-to-collector distance (T) in polymer electrospinning. First, an operating map in the V-T plane– with the potential to facilitate real-time control – reveals four electrospinning regimes including a newly identified rotational regime. Next, across experiments in which V and T are independently varied, we image and investigate regime-specific cone/jet dynamics using six quantifiable features. Our results demonstrate for the first time that potential drop (V/T) ─ although crucial in determining electrospinning outcomes─ is not a fundamental V-T coupling parameter. Further, the nature of coupling is shown to dynamically vary with specific V-T combinations. Significantly, small changes to the collector position orchestrates regime transitions at the needle tip despite the large separation distance. Supporting simulations implicate the roles of effective field strength, charge density and field line distribution near the cone apex as critical factors influencing V-T coupling.

中文翻译：

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聚合物静电纺丝中电压和尖端到收集器距离之间的耦合：从状态、转变和锥/射流特征分析中获得的见解

摘要 在这项研究中，我们阐明了聚合物静电纺丝中电压 (V) 和尖端到集电极距离 (T) 之间的耦合。首先，VT 平面中的操作图（具有促进实时控制的潜力）揭示了四种静电纺丝方式，包括新确定的旋转方式。接下来，在 V 和 T 独立变化的实验中，我们使用六个可量化的特征对特定区域的锥/射流动力学进行成像和研究。我们的结果首次证明，电位降 (V/T)——尽管对确定静电纺丝结果至关重要——不是基本的 VT 耦合参数。此外，耦合的性质显示为随特定 VT 组合动态变化。显着地，尽管分离距离很大，但收集器位置的微小变化会协调针尖处的状态转换。支持模拟暗示有效场强、电荷密度和锥顶附近的场线分布是影响 VT 耦合的关键因素。