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Influence of liquid bridge formation process on its stability in nonparallel plates

机译：液面桥梁形成过程对非平行板稳定性的影响

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The formation of a liquid bridge in non-parallel plates is very common and the stability (whether or not it can move spontaneously) of such liquid bridges has been studied a lot for industry, e.g. in printing applications. It is generally considered that the liquid bridge stability is determined by Contact Angle (CA), Contact Angle Hysteresis (CAH), the position of the liquid bridge (represented as P) and the dihedral angle (theta) between non-parallel plates. The stability equation is theta = f(CA, CAH, P). Since P is a process quantity, which is difficult to determine, so it is also difficult to obtain the critical equation for the stability of the liquid bridge. In the previous study (J. Colloid Interface Sci., 2017, 492, 207-217), based on the fitting simulation results, the critical equation about CA, CAH and theta is obtained, as theta = f(CA, CAH). However, in some special cases, the results are still biased (e.g. the weak hydrophilic situation). In this paper, unlike simulation, we get the critical equation theta = f(CA, CAH) from a theoretical point of view. For the first time, by in-depth analysis of the process of liquid bridge formation, the theoretical calculation equation of P is obtained as P = f(CA, CAH, theta). And then, combining the equations theta = f(CA, CAH, P) and P = f(CA, CAH, theta), the theoretical equation is obtained. A lot of simulations and experiments were performed to verify our theoretical equation. Furthermore, comparing our equation with the previous equation, it was found that our equation is more consistent with the experimental results (error less than 0.2 degrees). Finally, the importance of considering the liquid bridging process (the function of P) for stability analysis is illustrated by comparing the results with those not considered (the difference is more than 20% in some cases). The outputs of this paper provide in-depth theoretical support for the analysis and application of liquid bridges.
机译：非平行板中的液体桥的形成是非常常见的，并且对于工业而言，已经研究了这种液体桥的稳定性（无论是可以自发地移动）。在打印应用程序中。通常认为液体桥稳定性由接触角（CA），接触角滞后（CAH），液体桥（表示为P）的位置和非平行板之间的二偏角角（θ）。稳定性方程是θ= f（ca，cah，p）。由于P是一种难以确定的过程量，因此难以获得液体桥的稳定性的关键方程。在先前的研究中（J.Colod接口SCI。，2017,492,207-217）基于拟合仿真结果，获得了关于CA，CAH和THEA的关键方程，如θ= F（CA，CAH）。然而，在一些特殊情况下，结果仍然偏向（例如亲水性弱）。在本文中，与模拟不同，我们从理论的角度获取临界方程= F（CA，CAH）。首次，通过深入分析液态桥形成的过程，获得P的理论计算等式作为P = F（CA，CAH，THETA）。然后，组合等式Theta = F（CA，CAH，P）和P = F（CA，CAH，THETA），获得理论等式。进行了许多模拟和实验以验证我们的理论方程。此外，将我们的等式与前一个等式进行比较，发现我们的等式更符合实验结果（误差小于0.2度）。最后，通过将结果与未考虑的结果进行比较来说明考虑液态桥接过程（P的功能的p）的重要性（在某些情况下差异超过20％）。本文的输出为液态桥接的分析和应用提供了深入的理论支持。

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  • 来源
    《RSC Advances》 |2020年第34期|共7页
  • 作者

    Bian Xiongheng; Huang Haibo; Chen Liguo;

  • 作者单位

    Soochow Univ Collaborat Innovat Ctr Suzhou Nano Sci &

    Technol Robot &

    Microsyst Ctr Suzhou 215123 Peoples R China;

    Soochow Univ Collaborat Innovat Ctr Suzhou Nano Sci &

    Technol Robot &

    Microsyst Ctr Suzhou 215123 Peoples R China;

    Soochow Univ Collaborat Innovat Ctr Suzhou Nano Sci &

    Technol Robot &

    Microsyst Ctr Suzhou 215123 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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