论文标题
通过少量聚合物添加剂对液滴的反弹抑制对超氧气表面的影响
Rebound suppression of a droplet impact on a supersolvophobic surface by a small amount of polymer additives
论文作者
论文摘要
少量的聚合物溶解在液滴中会抑制液滴在超肺表面上撞击。这项工作研究了通过使用多体散发性粒子动力学模拟的分子量和聚合物的浓度来影响稀聚合物溶液的动力学。较长的聚合物或高聚合物浓度都可以抑制液滴的反弹，尽管其剪切粘度和液体蒸气表面张力与纯溶剂液滴没有差异。我们发现了一种抗重复的新机制，在该机制中，对跳跃运动的电阻施加了，而在较早的扩散和缩回阶段，非重复液滴的行为与回弹液滴相同。对减少反弹趋势的两个聚合物贡献进行了定量分析：通过聚合物吸附和聚合物伸长力的底物润湿性改变。
A small amount of polymer dissolved in a droplet suppresses droplet rebound when it impinges on a supersolvophobic surface. This work investigates impacting dynamics of a droplet of dilute polymer solution depending on the molecular weight and the concentration of the polymer by using multi-body dissipative particle dynamics simulations. Either the longer polymer or the high polymer concentration suppresses rebound of a droplet although its shear viscosity and the liquid-vapor surface tension are not different from those of a pure solvent droplet. We found a new mechanism of the anti-rebound in which the resistance is applied against the hopping motion, while behavior of the non-rebounding droplet at the earlier spreading and retraction stages is same as for the rebounding droplets. Two polymer contributions to reducing the rebound tendency are quantitatively analyzed: the alteration of the substrate wettability by the polymer adsorption and the polymer elongation force.
