In this paper, we experimentally investigated the impact dynamics of different viscous droplets on solid surfaces with diverse wettabilities. We show that the outcome of an impinging droplet is dependent on the physical property of the droplet and the wettability of the surface. Whereas only deposition was observed on lyophilic surfaces, more impact phenomena were identified on lyophobic and superlyophobic surfaces. It was found that none of the existing theoretical models can well describe the maximum spreading factor, revealing the complexity of the droplet impact dynamics and suggesting that more factors need to be considered in the theory. By using the modified capillary-inertial time, which considers the effects of liquid viscosity and surface wettability on droplet spreading, a universal scaling law describing the spreading time was obtained. Finally, we analyzed the post-impact droplet oscillation with the theory for damped harmonic oscillators and interpreted the effects of liquid viscosity and surface wettability on the oscillation by simple scaling analyses.

在本文中，我们通过实验研究了不同粘性液滴在具有不同润湿性的固体表面上的冲击动力学。我们表明撞击液滴的结果取决于液滴的物理性质和表面的可湿性。尽管仅在亲液表面上观察到沉积，但在疏液和超疏液表面上发现了更多的撞击现象。结果发现，现有的理论模型都无法很好地描述最大扩散因子，从而揭示了液滴冲击动力学的复杂性，并表明在理论中还需要考虑更多因素。通过使用修改后的毛细管惯性时间，该时间考虑了液体粘度和表面润湿性对液滴散布的影响，获得了描述散布时间的通用比例定律。